9th International Conference on New Frontiers in Physics (ICNFP 2020)


         9th International Conference on New Frontiers in Physics (ICNFP 2020)

  • 4 September 2020: Arrival day. 
  • 4 September 2020, 15:00 Start of Lectures day
  • 5 September 2020, 8:00 Opening of main plenary session of ICNFP2020   
  • 11 September 2020, 18:00 Closing of physical ICNFP 2020.
  • 12 September 2020 Departure day
  • 1-2 October 2020 Extended internet-only session of ICNFP 2020

The International Conference on New Frontiers in Physics aims to promote scientific exchange and development of novel ideas in science with a particular accent in interdisciplinarity. The conference will bring together worldwide experts and promising young scientists working on experimental and theoretical aspects of particle, nuclear, heavy ion and astro-particle physics and cosmology, with colleagues from other disciplines, for example solid state physics, mathematics, mathematical physics, quantum optics and other.

The conference will be hosted in the Conference Center of the Orthodox Academy of Creta (OAC), an exceptionally beautiful location only a few meters from the mediteranean sea.

  • Abhishek Sharma
  • Aditya Nath Mishra
  • Agostino De Iorio
  • Ahmed Mhamed
  • Airton Deppman
  • Alberto Salvio
  • Aleksandra Iakovleva
  • alexander migdal
  • Alexander Molochkov
  • Alexander Savin
  • Alexandre Shabetai
  • Alexey Yushkov
  • Alyssa Rae Montalbano
  • Anastasios Belias
  • Andrea Moretti
  • Andrea Pocar
  • Andrea Zani
  • Andrei Gridin
  • Andrei Smilga
  • Anna Driutti
  • Anna Holin
  • Antonia Di Crescenzo
  • Antonio De Maria
  • Antonio Gallerati
  • Apiwit Kittiratpattana
  • Arkadiy Taranenko
  • Attila Bonyár
  • Bakhtiyar Iskakov
  • Ben Carlson
  • Ben Kilminster
  • Benjamin Lehmann
  • Bing Zhou
  • Blaise Raheem Delaney
  • Bojana Ilic (Blagojevic)
  • Caterina Aruta
  • Chenzheng Zhu
  • Chunxu Zhang
  • Clara Taruggi
  • Claude Crepeau
  • Claudia Caterina Delogu
  • Cristina Biino
  • Daniel ROHRLICH
  • Dariusz Gora
  • David Laroze
  • Debasis Mondal
  • Dieter H.H. Hoffmann
  • Dmitry Madigozhin
  • Elena Bratkovskaya
  • Eleonora Polini
  • Elham E Khoda
  • Eliahu Cohen
  • Elizaveta Zherebtsova
  • Eugenio Megias
  • Evgeny Zabrodin
  • Federica Maria Simone
  • Federica Oliva
  • Francesco Barile
  • Gennady Kozlov
  • George Manolakos
  • Giancarlo Panizzo
  • Giovanni Renzi
  • Gregory Patellis
  • Grzegorz Zuzel
  • Haoqi Lu
  • Herve Partouche
  • Hideyuki Oide
  • Hitoshi Murayama
  • Ignat Fialkovskiy
  • Ignatios Antoniadis
  • Ignatios Antoniadis
  • Igor Denisenko
  • Ingmari Christa Tietje
  • Iosif Bena
  • Irene Bachiller Perea
  • Irene Nutini
  • Istvan Papp
  • Jana Schaarschmidt
  • Jaroslaw Stasielak
  • Jean Bragard
  • Jerome Baudot
  • Joerg Aichelin
  • Jon Paul Lundquist
  • Kolahal Bhattacharya
  • Krista Smith
  • Kyrill Bugaev
  • Larisa Bravina
  • Laszlo Pal Csernai
  • Laura Giacoppo
  • Laurent Thomas
  • Logan Morrison
  • Lorenzo Amati
  • Lukas Layer
  • Magdalena Skurzok
  • Magnus Schlösser
  • Maksim Ulybyshev
  • Marat Siddikov
  • Marcello Campajola
  • Marek Karliner
  • Margaret Carrington
  • Mariia Larionova
  • Mattia Di Mauro
  • Mauro Piccini
  • Max Maerker
  • Maxim Chernodub
  • Mia Tosi
  • Michael Suleymanov
  • Michal Dubovsky
  • Mikhail Zubkov
  • Miriam Kümmel
  • Mirzayusuf Musakhanov
  • Murad Sarsour
  • Natasa Vukasinovic
  • Nazar Yakovenko
  • Nikolay Gulitskiy
  • Nissan Itzhaki
  • Nolan Smyth
  • Oksana Polischuk
  • Patrick McCormack
  • Paul Frampton
  • Pavel Buividovich
  • Peter Parfenov
  • Peter Senger
  • Pietro Vischia
  • Po-Ju Lin
  • Poonam Jain
  • Punnatat Thaprasop
  • Qun Wang
  • Rajdeep Mohan Chatterjee
  • Ralph Massarczyk
  • Rita Bernabei
  • Roberto Seidita
  • Romain Gaior
  • Roman Litvinov
  • Roman Zhokhov
  • Rosamaria Venditti
  • Ruggero Caravita
  • Samuel May
  • Sanghwa Park
  • Sebastian Olivares
  • Sibilla Di Pace
  • Silvia Martellotti
  • Sofia Colombi
  • Sonia Kabana
  • Souvik Priyam Adhya
  • Stefano Profumo
  • Stuart Raby
  • Tadeas Dohnal
  • Teresa Bister
  • Theodota Lagouri
  • Tommaso Dorigo
  • Tomomi Kawaguchi
  • Uttiya Sarkar
  • Valentin Zakharov
  • Valeria Sequino
  • Victor Matveev
  • Victoria Volkova
  • Viktor Riabov
  • Vincent Wai Sum Wong
  • Vincenzo Caracciolo
  • Vipul Bairathi
  • Vladimir Nikolaenko
  • Volodymyr Klavdiienko
  • Xianglei Zhu
  • Xiaojun Yao
  • Yevhen Kravchenko
  • Yoav Afik
  • Yogesh Kumar
  • You Zhou
  • Zakhar Khaidukov
  • Zhongyukun Xu
  • Zuzana Moravcova
Support / Helpdesk
    • Plenary: Lectures Room 1

      Room 1

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      • 1
        Opening of the conference
      • 2
        The Higgs boson at the LHC
        Speaker: Sebastian Olivares (Pontifical Catholic University of Chile (CL))
      • 4:00 PM
        Coffee Break
      • 3
        Higgs Hidden/Dark Sector Physics

        The Standard Model (SM), while extremely powerful as a description of the strong, electromagnetic and weak interactions, does not provide a natural candidate to explain Dark Matter (DM). Theoretical as well as experimental motivation exists for the existence of a hidden or dark sector of phenomena that couples either weakly or in a special way to SM fields. Hidden or dark sectors near the weak scale are motivated by naturalness, thermal dark matter and electroweak baryogenesis. Hidden or dark sector states appear in many extensions to SM to provide a particulate candidate for dark matter in the universe or to explain astrophysical observations such as the positron excess observed in the cosmic radiation flux. If there is such a family of Beyond-the-Standard Model (BSM) particles and interactions, they may be accessible experimentally at the present and future High Energy Colliders.

        Speaker: Theodota Lagouri (Instituto De Alta Investigacion Universidad de Tarapaca (CL))
      • 4
        Machine Learning in LHCb

        The landscape of machine learning applications aiding the physics programme of LHCb is broad and expanding in preparation for the restart of data taking in 2021 and beyond. This talk aims to offer a broad overview of the machine learning solutions adopted at LHCb in the context of event reconstruction. Following the data acquisition and processing workflow at LHCb, machine learning applications in tracking, triggering and particle identification will be discussed. Furthermore, this talk will expand on the ongoing development of deep learning architectures employed in the context of calorimetric cluster reconstruction, leveraging the use of graph and convolutional neural networks. The lecture will conclude by providing an example of a deep-learning-driven approach to physics analysis and an outline of the more cutting-edge techniques currently under development to tackle the increased luminosity expected in LHCb's future upgrades.

        Speaker: Blaise Delaney
    • Plenary

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      • 5
        Talk on History of OAC Chapel and Meaning of Blessing. Blessing

        Talk on History of OAC Chapel and Meaning of Blessing. Blessing

        Speaker: Katerina Karkala
      • 6
        History of Crete

        History of Crete

        Speaker: Emanuela Larentzakis
    • Plenary Room 1

      Room 1

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      • 7
        Opening of the conference
      • 8
        Search for di-Higgs production at 13 TeV and prospects for HL-LHC

        The latest results on production of Higgs boson pairs at 13 TeV by the ATLAS experiment are reported, including a combination of six different decay modes. Results include bbtautau, bbbb, bbgamgam, bbWW, WWWW and WWgamgam final states, and they are interpreted both in terms of sensitivity to the SM and as limits on kappa_lambda, a scaling of the triple-Higgs interaction strength. Future prospects of testing the Higgs self-couplings at the High Luminosity LHC (HL-LHC) will also be presented.

        Speaker: Jana Schaarschmidt (University of Washington (US))
    • Workshop on Astro-Cosmo-Gravity Room 1

      Room 1

      • 9
        The characteristics of the Galactic center excess measured with 11 years of Fermi-LAT data

        The excess of gamma rays in the data measured by the Fermi Large Area Telescope from the Galactic center region is one of the most intriguing mysteries in Astroparticle Physics. This Galactic center excess (GCE), has been measured with respect to different interstellar emission models, source catalogs, data selections and techniques. Although several proposed interpretations have appeared in the literature, there are not firm conclusions as to its origin. The main difficulty in solving this puzzle lies in modeling a region of such complexity and thus precisely measuring the characteristics of the GCE.
        In this presentation I will show the results obtained for the GCE by using 11 years of Fermi-LAT data, state of the art interstellar emission models, and the newest 4FGL source catalog to provide precise measurements of the energy spectrum, spatial morphology, position, and sphericity of the GCE.

        Speaker: Dr Mattia Di Mauro (INFN Turin)
    • 10:30 AM
      Coffee Break
    • Semiplenary: Quantum Physics, Quantum Optics and Quantum Information Room 2

      Room 2

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      • 10
        Self-testing of quantum states using symmetric local hidden state model

        We introduce a symmetric local hidden state (slhs) model in a scenario, where two spacially separated parties receive quantum states from an unknown source. We derive an inequality based on the model. A completely new form of nonlocality emerges from the resource theoretic point of view. The inequality singles out a larger set of quantum correlated states than what is predicted by the local hidden variable (lhv) model or the existing lhs model. We propose an experiment to show the experimental violation of the inequality. We also show that the maximal violation of the inequality can be used to self-test the Bell state and measurement bases, leading to complete device-independence.

        Speaker: Debasis Mondal
      • 11
        Demystifying locality problem in Aharonov Bohm effect

        In Aharonov-Bohm effect [1], the electrons have been found to be influenced by the classical potentials in field free region. This led to the notion that in quantum mechanics, potentials are fundamental objects, in spite of gauge freedom. In this talk, we will show that a quantum theory of electrostatic and magnetostatic fields can explain the observed effects: the quanta of the static fields can exist in the regions where the total field is zero and that these quanta influence the electron wave functions. This will put an end to a sixty years old question on the locality in Aharonov-Bohm effect.
        [1] Y. Aharonov and D. Bohm, Phys. Rev.115, 485 (1959)

        Speaker: Dr Kolahal Bhattacharya (Manipal Centre for Natural Sciences)
      • 12
        Quantum information and entanglement with top quarks at the LHC

        Entanglement is a key subject in quantum information theory. Due to its genuine relativistic and fundamental nature, high-energy colliders are attractive systems for the experimental study of quantum information theory. We propose the detection of entanglement between the spins of top-antitop quark pairs at the LHC, representing the first proposal of entanglement detection in a pair of quarks, and also the entanglement observation at the highest energy scale so far. We show that entanglement can be observed by direct measurement of the angular separation between the leptons arising from the decay of the top-antitop pair. The detection can be achieved with more than 5 statistical deviations, using the current data recorded at the LHC. In addition, we develop a simple protocol to implement the quantum tomography of the top-antitop pair, providing a new experimental tool to test theoretical predictions for the quantum state of the top-antitop pair. Our work explicitly implements canonical experimental techniques of the quantum information field, paving the way to use high-energy colliders to study quantum information theory.

        Speaker: Yoav Afik (Technion- Israel Institute of Technology (IL))
      • 13
        A whole world lies between quantum non-locality and communication.

        We consider a hierarchy of classical and quantum correlations for multiple agents restricted in their ability to signal to each other.

        This work surveys the definitions of several non-locality classes (classical and quantum) and their relations. Existing results will be framed into a unified context and future of research will be outlined.

        Speaker: Claude Crepeau (McGill University)
    • Workshop on Astro-Cosmo-Gravity Room 1

      Room 1

      • 14
        The Transient high-Energy Sky and Early Universe Surveyor (THESEUS)

        The Transient High-Energy Sky and Early Universe Surveyor (THESEUS) is a space mission
        concept currently under Phase A study by ESA as candidate M5 mission, aiming at exploiting
        Gamma-Ray Bursts for investigating the early Universe and at providing a substantial
        advancement of multi-messenger and time-domain astrophysics. Through an unprecedented
        combination of X-/gamma-rays monitors, an on-board IR telescope and automated fast slewing
        capabilities, THESEUS will be a wonderful machine for the detection, characterization and
        redshift measurement of any kind of GRBs and many classes of X-ray transients. In addition
        to the full exploitaiton of high-redshift GRBs for cosmology (pop-III stars, cosmic
        re-ionization, SFR and metallicity evolution up to the "cosmic dawn"), THESEUS will allow
        the identification and study of the electromagnetic counterparts to sources of
        gravitational waves which will be routinely detected in the late '20s / early '30s by next
        generation facilities like aLIGO/aVirgo, LISA, KAGRA, and Einstein Telescope (ET), as well
        as of most classes of transient sources, thus providing an ideal sinergy with the large
        e.m. facilities of the near future like LSST, ELT, TMT, SKA, CTA, ATHENA.

        Speaker: Dr Lorenzo Amati (INAF - OAS Bologna)
    • Workshop on QCD Room 3

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      • 15
        Drell-Yan production at NLO in the Parton Branching method at low and high DY masses and low and high $\sqrt s$$

        Transverse Momentum Dependent (TMD) parton distributions obtained from the Parton Branching (PB) method are combined with next-to-leading-order (NLO) calculations of Drell-Yan (DY) production. We apply the MC@NLO method for the hard process calculation and matching with the PB TMDs.
        We compute predictions for the transverse momentum of Z bosons and Drell-Yan (DY) production. The theoretical predictions agree well, within uncertainties, with measurements at the Large Hadron Collider (LHC). We also compute the transverse momentum spectrum of low mass DY production at low center-of-mass energies $\sqrt s$ and compare our predictions with experimental measurements at low DY mass, and find very good agreement. In addition we use the low mass DY measurements at low $\sqrt s$ to determine the width $q_s$ of the intrinsic Gauss distribution of the PB -TMDs at low evolution scales and find values that have earlier been used in applications of PB -TMDs to high-energy processes at the LHC and HERA.

        Speaker: Qun Wang (Peking University (CN))
      • 16
        Gluons, Heavy and Light Quarks in the Instanton Liquid Model

        We are extending ILM to gluons, heavy quarks, and heavy-light quarks systems.
        In ILM $4N_c$ instanton collective coordinates = size $\rho\approx\bar\rho$, color orientation, position.
        $\rho\approx 0.3\,{\rm fm}$, inter-instanton distance $ R\approx 1\,{\rm fm}$, packing parameter $\lambda=\rho^4/R^4\approx 0.01.$
        ILM vacuum energy density $\approx - 500\,{\rm MeV}/{\rm fm^3}$.

        Instanton vs hadron sizes.
        $r_{J/\psi}= 0.25$ fm, $r_{\Upsilon}= 0.14$ fm, $r_N\sim 0.3-0.5$ fm.
        Small quark core size hadrons are insensitive to the confinement, ILM safely applicable.

        Light quarks in ILM. Dynamical quark mass $M(q)$.
        $M(0)\approx 360$ MeV $\sim \lambda^{1/2}\rho^{-1}$ $\sim$ strength of light quark-instanton interaction.
        Successful reproducing of light hadrons physics with $O(m,1/N_c,m/N_c)$ corrections.

        Gluons in ILM. Dynamical gluon mass $M_g(q)$.
        $M_g(0)\approx M(0)$ $\sim \lambda^{1/2}\rho^{-1}\sim$ strength of gluon-instanton interaction.

        Heavy quarks in ILM. ILM contribution to heavy quark mass $\Delta M(q)$.
        $\Delta M(0)\approx 70$ MeV $\sim \lambda\rho^{-1}\sim$ strength of heavy quark-instanton interaction.
        Heavy quark-antiquark potential $V(r)$ = ILM modified one gluon exchange $V_{ILM,g}(r)$ + direct instanton $V_{\rm dir}(r)$ + confinement $V_{\rm conf}(r)$ potentials.
        $V_{\rm cornell}(r)$ = one gluon exchange $V_g(r)$ + confinement $V_{\rm conf}(r)$ potentials.
        $V(r)$ vs $V_{\rm cornell}(r)$ $\Rightarrow$ $+5\div 10\,\%$ correction for charmonium $(c\bar c)$ ground state energy.

        Heavy+light quarks in ILM. $(c\bar c)'\rightarrow (c\bar c) \pi\pi$.
        Light quark factor $F_{\pi Q}\approx 0.6 F_{\pi}$.
        Heavy quark factor = dipole approximation$(1 + c\, r^2_{J/\psi}/\rho^2+...)$.
        $ c\, r^2_{J/\psi}/\rho^2\approx -0.372\,r^2_{J/\psi}/\rho^2\approx - 0.26 $.
        Standard approach = dipole approximation. Request for ILM reconsideration of heavy quarkonium light hadrons emission processes and light-heavy quarks meson states.

        ILM is a framework for uniform and consistent description of light and heavy quark physics.

        Speaker: Prof. Mirzayusuf Musakhanov (National University of Uzbekistan)
    • Parallel session Room 2

      Room 2

      • 17
        Quantum noise reduction in Advanced Virgo

        In order to detect the small distance variations induced by gravitational waves, very sensitive devices must be used. Gravitational wave (GW) detectors are sophisticated interferometers sensitive even to vacuum fluctuations. These latters are responsible for quantum noise (QN). Due to the frequency-dependent response of GW interferometers, QN manifests itself as Radiation Pressure Noise (RPN) for frequencies below 100 Hz, while as Shot Noise (SN) for higher frequencies.
        The solution that has been adopted in order to reduce QN is the injection, through the interferometer output port, of vacuum states with correlated amplitude and phase uncertainties, called “squeezed”.
        A Frequency-Independent Squeezing (FIS) technique, as a method for the reduction of the QN, has been already demonstrate in Advanced Virgo.
        RPN does not limit the sensitivity of the present interferometers, being this completely covered by other noises. But, in the near future, these noises will be reduced and also this quantum noise component will be relevant.
        The adopted solution to have a broad-band quantum noise reduction is a Frequency-Dependent Squeezing (FDS) technique.
        In this talk I will talk about the results obtained in Advanced Virgo using the FIS technique and the status of the FDS project.

        Speaker: Valeria Sequino (INFN - National Institute for Nuclear Physics)
      • 18
        Small scale suspended interferometer for ponderomotive squeezing as test bench for EPR squeezer integration in Advanced Virgo

        In 2015, after many years of R&D efforts of the LIGO-Virgo collaboration for the upgrade to the second generation of ground based gravitational wave detectors, for the first time it has been possible a direct observation of a gravitational wave event (GW). In the following years, many other GW events have been detected by both LIGO and Virgo. Nevertheless, in the very near future the present generation of detectors will face the limit in sensitivity due to the quantum nature of light: the so-called Standard Quantum Limit (SQL). Therefore, any future upgrade aiming at increasing the sensitivity implies quantum noise reduction techniques. LIGO and Virgo already adopt frequency independent squeezers, which reduce the quantum noise in the high frequency range where shot noise is dominant (above 200Hz). In the very near future, the detectors will be also limited by quantum noise in the low frequency range (below 100Hz), where radiation pressure noise is dominant. Therefore, it is crucial to develop table-top experiments aiming at testing broadband quantum noise reduction (10Hz-1kHz): frequency dependent squeezers. We are developing a small-scale interferometer with monolithic suspension of test masses (SIPS) that will be sensitive to the radiation pressure noise in the audio frequency band of GW detectors. In order to be able to produce frequency dependent squeezing (FDS) in the audio frequency band, seismic noise at low frequency must be suppressed. This can be possible by suspending the whole interferometer to a chain of mechanical filters like a superattenuator of Virgo. In the same time, we are developing a table-top experiment for the FDS generation through the Einstein Podolsky Rosen (EPR) principle. These two experiments are growing up in parallel. EPR technique, before the injection in Virgo for the quantum noise reduction, needs to be tested in an optical cavity achieving the radiation pressure noise limit. Therefore, the small-scale interferometer SIPS turns out to be a suitable test bench for the EPR technique before the integration in Virgo. In this talk the status of the art of the SIPS experiment and the design for the integration with the EPR experiment will be presented.

        Speaker: Laura Giacoppo (INFN - National Institute for Nuclear Physics)
    • Parallel session: A High Energy Particle Physics Room 3

      Room 3

      • 19
        Rydberg positronium for pulsed antihydrogen production

        The foreseen production of cold antihydrogen atoms at CERN's Antiproton Decelerator (AD) opened up the possibility to perform direct measurements of Earth's gravitational acceleration on antimatter bodies. This is one of the goals of the AEgIS collaboration: measure the value of g using a pulsed source of cold antihydrogen and a moiré deflectometer/Talbot-Lau interferometer. The milestones achieved so far by AEgIS, on the way of developing a pulsed cold antihydrogen source using resonant charge-exchange between antiprotons and cold Rydberg positronium, are presented.
        First, the procedure developed to capture, manipulate and prepare a cold plasma of antiprotons for antihydrogen production is summarized. Antiprotons were captured from the AD using aluminum degraders and cooled with electrons. These mixed e-/p+ plasma were radially compressed to sub-mm radii applying a rotating-wall drive and progressively reducing the number of cooling electrons. Antiprotons were finally transferred in high numbers to the antihydrogen production trap using an efficient in-flight launch and recapture procedure.
        Second, the many milestones achieved by AEgIS in producing, manipulating and studying Ps are summarized. Ps has been first studied in a dedicated setup for spectroscopy experiments at room temperature using nanoporous silica positron-positronium converters in a reflection geometry. The spectroscopy of its 1-3 and 3-15 transitions was carried out, first showing the feasibility of AEgIS' proof-of-concept in-flight laser excitation. These experiments yielded as a byproduct the development of a pulsed long-lived source of 23S Ps atoms, which may be considered in the future to directly probe gravity on positronium. Ps was subsequently formed also from the 10K cryogenic converter inside the main AEgIS experiment, leading to the first Ps laser excitation to the Rydberg levels in a 1T magnetic field and to the detailed characterization of the Ps source for antihydrogen production.

        Speaker: Ruggero Caravita (Universita degli Studi di Trento and INFN (IT))
      • 20
        Observation of a strong diocotron instability in an antiproton plasma ring and ``tailoring'' of pure electron plasmas in the strong drive regime

        Non-neutral plasmas – in the zero temperature limit - can be described in analogy to a $2$-dimensional fluid [1]. We observe the temporal stages of a Kelvin-Helmholtz-like diocotron instability of an antiproton ring. The evolutionary stages are comprised of a linear part during which the instability grows, followed by a collapse of the ring into vortices, and a nonlinear part consisting of vortex interactions. Some characteristics of the evolutionary stages can be related to the initial ring dimensions.

        A second part of the talk addresses the so-called SDREVC (strong drive evaporative cooling) technique, which was pioneered by [2], and which we have successfully implemented in the AEgIS experiment. The technique ``tailors'' pure electron plasmas in terms of their radii, densities and thus particle number to an accuracy of 1-2 \%. This is an improvement of a factor of $10$ with respect to what was reported by experiments from the low-energy antimatter community prior to SDREVC.

        [1] R. H. Levy, “Diocotron instability in a cylindrical geometry”, The Physics of Fluids
        8, 1288–1295 (1965).
        [2] ALPHA collaboration “Enhanced control and reproducibility of non-neutral plasmas”, Phys. Rev. Lett. 120, 025001 (2018).

        Speaker: Ingmari Christa Tietje (TU Berlin, CERN)
    • Parallel session: Cosmology, Astrophysics, Gravity, Mathematical Physics Room 1

      Room 1

      • 21
        The Physics Program of the PADME Experiment

        The PADME experiment, conducted at Laboratori Nazionali di Frascati of INFN, searches for a signal of a Dark Photon A’ in the e+e−→γA’ reaction in a positron-on-target experiment by evaluating the missing mass of annihilation events with a single photon.
        The basic idea is that a massive photon-like particle could be the portal toward a hidden sector where Dark Matter is secluded. In about one year of data taking, a sensitivity on the interaction strength down to 0.001 is achievable in the mass region M(A’) <23.7 MeV.
        In addition, the PADME approach allows searches for any new particle produced in e+e− collisions through a virtual off-shell photon, such as long lived Axion-Like-Particles (ALPs), proto-phobic X bosons, Dark Higgs, etc. In the talk, the scientific program of the experiment and its current status will be illustrated.

        Speaker: Federica Oliva
      • 22
        The PADME Detector

        To search for the production of a dark photon (A’) in the process e+ e− → A'γ, the PADME apparatus has been built at the Frascati National Laboratory of INFN. This is a small-scale detector consisting of an active target, a beam monitor system, a spectrometer to measure the charged particle momenta in the range 50-400 MeV, a dipole magnet to deflect the primary positron beam out of the spectrometer and allow charged particles momentum analysis and an electromagnetic calorimetric system to detect with high accuracy the signal and background photons produced in the annihilations.
        Each element has specific requirements that are stringent and sometimes at the limit of present technology.
        In the talk will be given an overview of each component, and a description of the chosen technical solutions implemented to accomplish the experiment needs. Results of the commissioning data taking, performed from October 2018 to February 2019, will be illustrated.

        Speaker: Clara Taruggi
    • 1:30 PM
    • Plenary: Machine Learning Room 1

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      • 23
        Can Machine Learning Rid Us Of Systematic Uncertainties?

        In the past few years a number of new advanced machine learning tools and techniques have become available for data analysis. Besides offering improved ways to tackle old problems of interest to fundamental physics, such as event classification for signal enhancement, they also provide entirely new solutions to previously unapproachable issues. In this talk will be given an overview of recently proposed methods to reduce the deteriorating impact of systematic uncertainties on parameter estimation. Their potential of improving the measurement capabilities of experiments in HEP and astro-HEP is very significant.

        Speaker: Tommaso Dorigo (Universita e INFN, Padova (IT))
    • 4:00 PM
      Coffee Break
    • Mini-workshop on Machine Learning for Particle Physics Room 1

      Room 1

      • 24
        Outlier detection in heavy-ion collisions with unsupervised learning

        High energy nuclear collision experiments produce large amounts of data which are often challenging to handle. We present machine learning algorithms using unsupervised learning to find so-called outlier events which might occur e.g. due to detector malfunction or imperfect centrality determination. Their detection can be crucial for the correct determination of sensitive observables. We implement and compare Principle Component Analysis (PCA) and Autoencoders (AEN) which both are dimensional reduction algorithms. Training data is provided from the UrQMD transport model with artificially generated outliers due to wrong centrality determination, detector malfunction, and general data loss. A Receiver-Operating-Characteristic curve allows us to compare the performance between different models and different selection criteria. The results show that for the selected application, the reconstruction error criterion is most suitable for outlier detection tasks. Furthermore, the number of encoded dimensions significantly influences the performance of outlier detection tasks. A small number of total parameter that still keeps enough significance appears best suited to separate outlier and signal events.

        Speaker: Punnatat Thaprasop (SUT)
      • 25
        New approaches to the problem of unfolding

        Matrix inversion problems are often encountered in experimental physics, and in particular in high-energy particle physics, under the name of unfolding. The true spectrum of a physical quantity is deformed by the presence of a detector, resulting in an observed spectrum. If we discretize both the true and observed spectra into histograms, we can model the detector response via a matrix. Inferring a true spectrum starting from an observed spectrum requires therefore inverting the response matrix. Many methods exist in literature for this task, all starting from the observed spectrum and using a simulated true spectrum as
        a guide to obtain a meaningful solution in cases where the response matrix is not easily invertible.
        In this Contribution, I take a different approach to the unfolding problem by exploring several methods of connecting the true to the smeared space, using machine learning techniques; some of these methods outperform current state-of-the art algorithms in problems with a non-trivial null space. Regularization schemes are introduced to treat the case where non-diagonal response matrices result in high-frequency oscillations of the solution in true space, and the introduced bias is studied.

        Speaker: Dr Pietro Vischia (Universite Catholique de Louvain (UCL) (BE))
      • 26
        Machine Learning (CMS)

        Advanced machine learning methods are increasingly used in CMS physics analyses to maximize the sensitivity of a wide range of measurements. The landscape is diverse in terms of both methods and applications. Deep learning methods, from recurrent LSTM architectures for classification tasks to deep autoencoders for data quality monitoring, have greatly improved the physics results delivered from the CMS experiment. Algorithms are developed both for collaboration-wide use as well as for individual physics analyses. Many marquee results from CMS, like the measurement of the Higgs boson’s properties in the diphoton decay channel, exploit a multitude of different machine learning algorithms to reduce the uncertainties on measured properties of the Higgs boson.

        Speaker: Samuel May (Univ. of California San Diego (US))
    • Workshop on QCD Room 2

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      • 27
        Anomalous Currents and Constitutive Relations of a Chiral Hadronic Superfluid

        The anomalous currents of two-flavor chiral nuclear matter in the presence of chiral imbalance are computed, using recently developed methods exploiting generalized transgression, which facilitates the evaluation of both the equilibrium partition function and the covariant currents. The constitutive relations for both the broken and unbroken phase of the theory are studied and the out-of-equilibrium nondissipative transport coefficients determined. In the superfluid phase, the vector covariant currents exhibit nondissipative chiral electric, magnetic, and vortical effects, the latter governed by chiral imbalance. This work is based on Ref. [1]. Other references are [2-4].

        [1] J.L. Mañes, E. Megias, M. Valle, M.A. Vazquez-Mozo, JHEP 1912 (2019) 018. arXiv: 1910.04013[hep-th].
        [2] K. Fukushima and K. Mameda, Phys. Rev. D86 (2012) 071501, arXiv: 1206.3128.
        [3] J.L. Mañes, E. Megias, M. Valle, M.A. Vazquez-Mozo, JHEP 1811 (2018) 076. arXiv: 1806.07647[hep-th].
        [4] T. Brauner and H. Kolesova , Nucl. Phys. B945 (2019) 114676. arXiv:1809.05310.

        Speaker: Dr Eugenio Megias (University of Granada)
      • 28
        Sudden increase in the degrees of freedom in dense QCD matter

        We present the extraction of the temperature by analyzing the charged particle transverse momentum spectra in lead-lead (Pb-Pb) and proton-proton (${\bf pp}$) collisions at LHC energies from the ALICE Collaboration using the Color String Percolation Model (CSPM). From the measured energy density ${\boldsymbol \varepsilon}$ and the temperature T the dimensionless quantity $ {\boldsymbol \varepsilon/}T^{4}$ is obtained to get the degrees of freedom (DOF), ${\boldsymbol \varepsilon}/T^{4}$ = DOF ${\boldsymbol \pi^{2}}$/30. We observe for the first time a two-step behavior in the increase of DOF, characteristic of deconfinement, above the hadronization temperature at temperature $\sim$ 210 MeV for both Pb-Pb and ${\bf pp}$ collisions and a sudden increase to the ideal gas value of $\sim $ 47 corresponding to three quark flavors in the case of Pb-Pb collisions.

        Speaker: Dr Aditya Nath Mishra (ICN-UNAM)
      • 29
        Fractal Aspects of QCD

        The scaling properties of Yang-Mills fields, and in particular of the QCD, are analyzed from the point of view of fractal systems. We show that fractal structures can be formed in any Yang-Mills field, and that the fractal dimension is related to the fundamental parameters of the field theory.

        In addition, the fractal structures leads to power-law distributions that are related to the distributions in Tsallis non extensive thermodynamics. The entropic index, $q$, is determined from the QCD parameters, namely, number of flavours and number of colors.

        Several experimental aspects of high energy collisions are analyzed under the light of the proposed theory. In particular, we show that the entropic index calculated is in good agreement with that obtained from experimental data analysis.

        Speaker: Airton Deppman (Universidade de São Paulo)
    • Plenary: High Energy Particle Physics Room 1

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      • 30
        Higgs physics at CLIC

        The Compact Linear Collider (CLIC) is a mature option for a future electron-positron collider operating at centre-of-mass energies of up to 3 TeV. CLIC is foreseen in a staged approach with three centre-of-mass energy stages currently assumed to be 380 GeV, 1.5 TeV and 3 TeV. This contribution discusses the physics potential of CLIC in the area of Higgs physics based on benchmark analyses using full detector simulation. The initial stage of operation allows study of Higgs production in Higgsstrahlung and WW-fusion, resulting in precise measurements of the production cross sections and the total Higgs-boson decay width. Operation at high energy will provide high-statistics samples of Higgs bosons produced in WW-fusion enabling tight constraints on Higgs couplings and measurement of double Higgs production.

        Speaker: Natasa Vukasinovic (Vinca Institute of Nuclear Sciences)
      • 31
        Overview on the ILC project and political situation in Japan

        A large, worldwide community of physicists is working to realise an exceptional physics program of energy-frontier, electron-positron collisions with the International Linear Collider (ILC). This is an ideal collider for precision studies of the Higgs boson and searches for new physics beyond the Standard Model.The Higgs factory is recommended as the highest-priority next collider after CERN’s LHC. The ILC satisfies this priority, with an initial center-of-mass energy of 250 GeV as a “Higgs Factory”, and the upgradability up to 1 TeV. It is the most advanced proposal in technology, maturity, cost, and preparation in international cooperation. Highlighting the global nature of particle physics, the 2020 European Strategy Update for Particle Physics reaffirms that the timely realization of the ILC in Japan is compatible with the strategy. In this talk, we will review the physics goals and prospects, the key accelerator and detector technologies, and the recent advances of the project.

        Speaker: Hitoshi Murayama (University of California Berkeley (US))
    • Plenary Room 1

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      • 32
        Weak gravity conjecture in an accelerating Universe

        I will describe the weak gravity conjecture in flat and de Sitter space and the difficulties to obtain An accelerating Universe in string theory.

        Speaker: Prof. Ignatios Antoniadis (LPYHE Paris and AEC Bern)
      • 33
        Quiver Theory and Gravitational Waves

        Quiver Theory and Gravitational Waves

        Speaker: Paul Frampton (University of Salento)
      • 34
        CMS Highlights

        During the LHC Run 2, the CMS experiment recorded an integrated luminosity of proton-proton collision data corresponding to about 140 fb-1 at a center of mass energy of 13 TeV.
        With such a large volume of dataset at an unprecedented energy, CMS has updated many physics searches.
        Direct searches for new particles predicted by theories beyond the Standard Model (SM) have been pursued, touching unexplored phase-space regions; the precision on various Standard Model measurements has substantially improved, thus making the SM a more and more powerful tool to search for new physics.
        Higgs boson properties have been measured in the di-photon channel with highest precision; CP and anomalous couplings of the Higgs boson have been probed in the di-tau and 4-leptons final states. Moreover, for the first time, we observed the decay of the Higgs boson in opposite charged muon pairs.
        The features of all the mentioned searches will be reported, together with a selection of the most recent results on top quark, B-Physics and new physics searches.
        The status of the CMS detector and reconstruction algorithms in Run2 will be briefly described and the prospects and ongoing activities for next LHC runs will be discussed.

        Speaker: Rosamaria Venditti (Universita e INFN, Bari (IT))
      • 35
        What does quantum mechanics conserve?

        We raise fundamental questions about the very meaning of conservation laws in quantum mechanics and we argue that the standard way of defining conservation laws, while perfectly valid as far as it goes, misses essential features of nature and has to be revisited and extended.

        Speaker: Daniel ROHRLICH (Ben-Gurion University of the Negev)
    • 10:30 AM
      Coffee Break
    • Plenary: High Energy Particle Physics Room 1

      Room 1

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      • 36
        ATLAS Searches for Resonances Decaying to Boson Pairs

        Many extensions to the Standard Model predicts new particles decaying into two bosons (W, Z, photon, or Higgs bosons) making these important signatures in the search for new physics. Searches for such diboson resonances have been performed in final states with different numbers of leptons, photons and jets and b-jets where new jet substructure techniques to disentangle the hadronic decay products in highly boosted configuration are being used. This talk summarizes recent ATLAS searches with LHC Run 2 data collected.

        Speaker: Mr Zhongyukun Xu (Shandong University (CN))
      • 37
        Searches for BSM Higgs at ATLAS

        The discovery of the Higgs boson with the mass of about 125GeV completed the particle content predicted by the Standard Model. Even though this model is well established and consistent with many measurements, it is not capable to solely explain some observations. Many extensions addressing this fact introduce additional Higgs-like bosons which can be either neutral, singly-charged or even doubly-charged. Other theories suggest that the Higgs may couple to hidden-sector states that do not interact under the Standard Model gauge transformations. Models predicting exotic Higgs decays to pseudoscalars can explain the galactic center gamma-ray excess, if the additional pseudoscalar acts as the dark matter mediator. This talk presents recent ATLAS searches for decays of the 125 GeV Higgs boson to a pair of new light bosons, and searches for additional Higgs bosons The current status of searches based on full Run2 data of the ATLAS experiment at the LHC are presented.

        Speaker: Max Maerker (Technische Universitaet Dresden (DE))
      • 38
        Search for rare decays of the observed Higgs boson and additional Higgs bosons with the ATLAS detector

        The unprecedented amount of data recorded by the ATLAS experiment during the LHC pp collision run at 13 TeV allows to search for rare decays of the Higgs boson. In addition, the sensitivity of searches for additional Higgs bosons is highly increased. The latest results on these topics will be presented.

        Speaker: Tomomi Kawaguchi (Nagoya University (JP))
      • 39
        Searches for electroweak production of supersymmetric particles with the ATLAS detector

        The direct production of electroweak SUSY particles, including sleptons, charginos, and neutralinos, is a particularly interesting area with connections to dark matter and the naturalness of the Higgs mass. The small production cross sections lead to difficult searches, despite relatively clean final states.The ATLAS experiment is exploring this experimentally challenging frontier with the large integrated luminosity of Run 2, multiple signatures, and new experimental techniques. This talk will highlight the most recent results of searches performed by the ATLAS experiment for supersymmetric particles produced via electroweak processes. Models are targeted in both R-parity conserving as well as R-parity violating scenarios.

        Speaker: Abhishek Sharma (University of Adelaide (AU))
      • 40
        Searches for strong production of supersymmetric particles with the ATLAS detector

        Supersymmetry (SUSY) provides elegant solutions to several problems in the Standard Model, and searches for SUSY particles are an important component of the LHC physics program. Naturalness arguments for weak-scale supersymmetry favour supersymmetric partners of the gluons and third generation quarks with masses light enough to be produced at the LHC. This talk will present the latest results of searches conducted by the ATLAS experiment which target gluino and squark production, in a variety of decay modes. It covers both R-parity conserving models that predict dark matter candidates and R-parity violating models that typically lead to high-multiplicity final states without large missing transverse momentum, and includes results which use new techniques to target compressed regions which have historically been difficult to access due to small mass splittings between SUSY particles.

        Speaker: Chenzheng Zhu (Chinese Academy of Sciences (CN))
      • 41
        CMS SUSY Searches

        We summarize the recent results from CMS searches for supersymmetric particles for Run 2 at CM energy of 13 TeV. Strong and weak production of SUSY scenarios in both R-parity conserving and R-parity violating supersymmetric scenarios are considered. Results are presented for the recent searches for squark and gluinos, direct production of charginos, neutralinos and sleptons. These searches involve final state objects reconstructed using the data collections at CMS which include jets, missing transverse momentum, electrons or muons, taus or photons, as well as long-lived particle signatures. The data in these searches are analyzed and found to be consistent with the standard model predictions and no significant excess is observed. Therefore, upper limits have been set on the masses of supersymmetric particles from the variety of search channels.

        Speaker: Mr Uttiya Sarkar (Tata Inst. of Fundamental Research (IN))
    • 1:30 PM
    • 4:00 PM
      Coffee Break
    • Plenary: High Energy Particle Physics Room 1

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      • 42
        Vector-boson fusion, vector-boson scattering and diboson production at ATLAS

        Measurements that exploit electroweak boson scattering and electroweak boson fusion (VBF) processes have become increasingly common at the Large Hadron Collider in the last few years. In this talk, we present the observation of electroweak ZZjj production, evidence for electroweak Zyjj production and the first measurement of differential cross-sections for electroweak Zjj production. In addition, we present precision differential cross-section measurements of inclusive 4-lepton production and inclusive Zy production. All of the differential cross-section measurements are corrected for detector effects and are compared to the predictions of state-of-the-art Monte Carlo event generators. The detector-corrected data are also used to search for signatures of physics beyond the SM.

        Speaker: Bing Zhou (University of Michigan (US))
      • 43
        Dark matter searches at CMS

        Searches in CMS for dark matter particles, mediators, and dark sector extensions will be presented. Various final states, topologies , and kinematic variables are explored utilizing the full LHC Run-II data-set collected at the LHC.

        Speaker: Ben Kilminster (Universitaet Zuerich (CH))
      • 44
        Dark Matter searches with the ATLAS Detector

        The presence of a non-baryonic dark matter component in the Universe is inferred from the observation of its gravitational interaction. If dark matter interacts weakly with the Standard Model it would be produced at the LHC, escaping the detector and leaving a large missing transverse momentum as their signature. The ATLAS detector has developed a broad programme to directly search for DM. The results of recent searches on 13 TeV pp data, giving the details of analysis techniques and improvements used and their interpretation, will be presented.

        Speaker: Ben Carlson (University of Pittsburgh)
      • 45
        Measurements of photon-photon fusion at ATLAS

        Photon-photon fusion is a rare process at hadron and ion colliders. It is particularly interesting as a remarkably clean interaction with little (if any) remnant activity from the interacting particles. In this talk, we present the status of photon-photon fusion measurements at the ATLAS detector. This includes the production of photon pairs via light-by-light scattering in heavy ion collisions as well as photon-photon fusion measurements in proton-proton collisions that contain two charged leptons in the final state. The experimental techniques used in the proton-proton and heavy-ion measurements are different, due to the different amounts of pile-up activity, and will be discussed in detail.

        Speaker: William Patrick Mccormack (Lawrence Berkeley National Lab. (US))
      • 46
        ATLAS measurement of CP Violation with Beauty mesons

        The ATLAS experiment has performed accurate measurements of mixing and CP violation with the neutral B mesons. This talk will focus on the latest results from ATLAS on the CP violation in Bs to Jpsi phi decays. The Standard Model predicts the CP violating phase, phi_s, to be very small and its SM value is very well constrained, while in many new physics models large phi_s values are expected. The Bs0—>J/psi phi decay channel is sensitive to new physics contributions, and even small deviations in a measurement of phi_s would be hints for the existence of new particles.

        Speaker: Vladimir Nikolaenko (Institute for High Energy Physics of NRC Kurchatov Institute (R)
    • Poster Session
      • 47
        Broadband quantum noise reduction via frequency dependent squeezing for Advanced Virgo Plus

        Quantum noise is limiting the sensitivity of ground based gravitational wave detectors both at high frequency, in the form of shot noise, and low frequency, in the form of radiation pressure noise. In the last observing run, the injection of frequency independent squeezing improved Virgo and LIGO sensitivities at high frequency, slightly worsening the performance at low frequency. A broadband quantum noise reduction can be achieved using frequency dependent squeezing, i. e. rotating the vacuum squeezed ellipse below 100 Hz by reflecting the squeezed vacuum off a Fabry-Perot cavity, called filter cavity. The first demonstration of this technique at the right configuration to reduce quantum noise in the whole observation bandwidth, has been obtained in TAMA, at NAOJ, Tokyo, Japan, where I worked for my master thesis. The experiment uses a 300 meter long filter cavity, similar to the ones planned to be installed in Virgo and LIGO. Once the frequency dependent squeezing is produced, it has to be injected into the interferometer. The interface between the squeezing setup and Virgo is not trivial, since it requires the installation of additional benches and a 285 meter long cavity and also to couple the rotating squeezed vacuum with the detector. In this context, I work on the preparation and installation of the two benches connecting the vacuumsqueezed source to the filter cavity. An important issue which can worsen the performance of frequency dependent squeezing or directly the interferometer sensitivity is the stray light. To avoid the propagation of additional stray light, I traced the ghost beams on these benches, inside linking tubes and inside the filter cavity andwe will install several diaphragms and baffles to limit this problem.

        Speaker: Ms Eleonora Polini (LAPP)
      • 48
        Radiation dominated implosion with flat target

        Inertial confinement fusion achieved with highly energetic laser pulse is a promising method to provide clean, affordable energy in the future. The state of the art of present research and development is hindered by hydrodynamic instabilities occurring at the high compression of the target fuel. Recent studies [1,2] show that a simultaneous ignition could prevent these instabilities. Combining advancements in two fields, detonations in relativistic fluid dynamics and radiative energy deposition by plasmonic nano-shells lead to decreased or eliminated initial compression of the target . Rapid volume ignition can be achieved with a short final energetic laser pulse, having penetration time closely matched to the speed of light across the target. Here, we discuss a flat fuel target irradiated from both sides simultaneously, proposing ignition with smaller compression, largely increased energy, entropy and temperature increase. Instead of external indirect heating with losing energy, we aim for maximized internal heating in the target with the advances in nano-technology. Neglecting the reflectivity of the target we propose increasing the absorptivity by using plasmonic nano-shells embedded into the target. Therefore, we achieve higher ignition temperature and radiation dominated dynamics. Based on relativistic fluid dynamics calculations with this method, the ignition temperature can be reached simultaneously in a bigger volume of the target's interior.  This reduces development of instabilities, which prevents the complete ignition of the target.

        [1] L. P. Csernai, N. Kroo, and I. Papp, “Radiation dominated implosion with nano--plasmonics,” Laser Part. Beams. 36 (2), 171--178 (2018).
        [2] L. P. Csernai and D. D. Strottman, “Volume ignition via time-like detonation in pellet
        fusion,” Laser Part. Beams. 33 (2), 279--282 (2015).

      • 49
        Studying of processes caused by stopped muons for the energy scale determination in the DANSS experiment

        The Standard Model includes three types of active neutrinos. Some recent experimental results indicate a possible existence of a sterile neutrino that is beyond the Standard Model. One of the DANSS experiment goals is the search for the sterile neutrinos. DANSS is a one cubic meter highly segmented solid scintillator detector. It is placed under an industrial reactor at the Kalinin NPP (Russia) on a movable platform. The experiment results are based on a change in the shape of the antineutrino spectrum at different distances from the reactor core. Antineutrino energies are determined from the inverse beta decay reaction by measuring energies of produced positrons, therefore the energy scale accuracy is a key parameter for the data analysis. We use two processes caused by stopped muons in order to determine the energy scale: muon decays at rest and beta decays of boron produced in stopped muons capture on carbon. In the poster we describe a method of identification of muons stopped inside the central cube of the detector and present selection criteria for studied reactions. The measured electron and positron energy spectra from the two studied processes are compared with the results of the Monte Carlo simulations in order to determine the corrections to the energy scale and the additional blurring coefficient, required to describe the experimental data. Systematic uncertainties in the energy scale determination using these methods are discussed in detail.

        Speaker: Aleksandra Iakovleva (Moscow Institute of Physics and Technology)
      • 50
        The ASTAROTH Project - a novel technique for NaI(Tl) crystal cool-down

        ASTAROTH is an R&D project aiming at improving the physics reach of direct dark matter (DM) detection experiments based on NaI(Tl) scintillating crystals, like SABRE, ANAIS, COSINE. These collaborations aim at testing the dark matter interpretation of the DAMA annual modulation signal, with the same target and techniques. ASTAROTH instead proposes a technology development that lowers the detection energy threshold, making it possible for the first time to observe sub-keV recoils. This would allow disentangling different DM-induced modulation models, thus possibly restricting the parameter space of a surviving DM candidate. A lower threshold can be achieved by technological advancements, such as immersing the target NaI(Tl) crystals in a cryogenic medium, and reading them out with Silicon PhotoMultipliers (SiPM), which feature lower dark noise than PMTs at T<150 K. The perfect cooling medium is liquid Argon, a scintillator that can double as veto detector. At this stage, ASTAROTH is in a technology demonstration phase, where an innovative controlled crystal cooling technique is being developed. This will allow characterizing the crystals performance in a broad range of temperatures, and selecting the best working point. This contribution will outline the physics potential of the ASTAROTH project and describe the details of the cooling technique.

        Speaker: Andrea Zani (Università degli Studi e INFN Milano (IT))
      • 51
        Measurement of the Higgs boson off-shell coupling to constrain the total width in the ZZ final state with the ATLAS detector

        After the Higgs boson observation, a number of measurements have been performed to quantify the properties of this particle. Even though there is strong evidence that the observed particle is the Higgs boson predicted by the Standard Model (SM), there is still space for Beyond SM candidates. Efforts to measure the properties of the Higgs boson are primarily focused on on-shell production. However, above 125 GeV off-shell production of the Higgs boson has a substantial cross section at the LHC, due to the increased phase space as the vector bosons (V = W, Z) and top quark decay products become on-shell with the increasing energy scale. Off-shell production can provide sensitivity to new physics that alters the interactions between the Higgs boson and other fundamental particles in the high-mass region. The SM Higgs boson has a narrow total width, approximately 1000 times smaller than the current detector resolution, being impossible to measure it directly at the Large Hadron Collider (LHC). A measurement of the relative off-shell and on-shell event yields provides direct information about the Higgs boson total width, if one assumes identical on-shell and off-shell Higgs boson coupling modifiers.

        Speaker: Sebastian Olivares (Pontifical Catholic University of Chile (CL))
      • 52
        A new simulation tool for the LUNA experiment

        A new simulation tool for the LUNA experiment

        Speaker: Francesco Barile (INFN Sezione di Bari)
      • 53
        Characteristics of hadrons and muons in EAS

        Obtaining information from experimental data on a wide number of EAS, which are currently available for studying primary cosmic radiation and the explosive effects of hadrons at energies above 1015 eV, requires multi-parameter EAS studies. For example, the study of fluctuations in the number of muons in a shower with a fixed number of electrons or fluctuations in the distribution of the depth of the cascade maximum studied in the Chernekov light in a fixed primary energy can provide information on the primary cosmic radiation. The energy of the primary particle that initiated the shower is most often estimated by the charged component of EAS. The calculation of space-energy characteristics can be related both to the presence of several ranges of visible energies, and from the point of view of the need for the necessary separate consideration of physical processes in different energy ranges. This work will be considered at the conference.

        Speaker: Bakhtiyar Iskakov (Satbayev University)
    • Concert of Classical Music per internet
      • 54
        L. van Beethoven - Sonata No. 2 g-moll for cello and piano op.5 no.2

        L. van Beethoven - Sonata No. 2 g-moll for cello and piano op.5 no.2

        Speakers: Vladimir Nor, Ruben Muradyan
      • 55
        L. van Beethoven - Sonata No. 3 A-Dur for cello and piano op.69

        L. van Beethoven - Sonata No. 3 A-Dur for cello and piano op.69

        Speakers: Vladimir Nor, Ruben Muradyan
      • 56
        S. Rakhmaninov - Elegiac trio No. 2 d-moll "In Memory of the Great Artist".

        S. Rakhmaninov - Elegiac trio No. 2 d-moll "In Memory of the Great Artist".

        Speakers: Svetlana Nor, Vladimir Nor, Ruben Muradyan
      • 57
        S. Rakhmaninov - Melody.

        S. Rakhmaninov - Melody.

        Speakers: Vladimir Nor, Ruben Muradyan
      • 58
        S. Rakhmaninov - Vocalise (arranged for piano).

        S. Rakhmaninov - Vocalise (arranged for piano).

        Speaker: Ruben Muradyan
    • Plenary Room 1

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      • 59
        Future physics with CMS

        The CMS Collaboration continues to work actively on developing the physics program for the High-Luminosity LHC (HL-LHC).
        The HL-LHC will extend the LHC program to the second half of the 2030’s with pp collisions at 14 TeV with an integrated luminosity
        of 3 ab$^{-1}$ each for ATLAS and CMS experiments, and PbPb and pPb collisions with integrated luminosities of 13 nb$^{-1}$ and 50 nb$^{-1}$,
        A factor of ten increase in the integrated luminosity compare to the initial LHC program, and new and improved detector components,
        open the door for refined studies
        of the properties of the Higgs boson, including its self-coupling,
        allow precision measurements of standard-model process, and further investigations of the flavor sector and the quark-gluon plasma.
        The CMS physics projects for the HL-LHC are discussed.

        Speaker: Alexander Savin (University of Wisconsin Madison (US))
      • 60
        Physics Prospects of PANDA at FAIR

        The PANDA experiment (antiProton ANnihilation at DArmstadt) is one of the four key experiments to be operated at FAIR (Facility for Antiproton and Ion Research), which is currently under construction near Darmstadt/Germany. This fixed target experiment will address a wide range of open questions in the field of hadron physics. The detector consists of at target as well as a forward spectrometer to fully exploit the forward boosted collisions of antiprotons with dense hydrogen or nuclear targets. Phase-space cooled antiprotons with momenta in the range of 1.5 GeV/c to 15 GeV/c provided by the High Energy Storage Ring (HESR) allow for high precision line-shape scans. The ability to perform exclusive reconstruction of arbitrary final states enables a physics program including topics such as spectroscopy in the charmonium and open-charm region, proton structure, and hyperon and hypernuclear physics. The talk will give an overview of the PANDA experiment and highlight the most important aspects of the physics program.

        Speaker: Miriam Kümmel (Institut für Experimentalphysik I, Ruhr-Universität Bochum)
      • 61
        Wigner - Weyl calculus in quantum field theory

        We review recent development of Wigner - Weyl calculus within quantum field theory. In particular, we discuss diagram technique in terms of Wigner transformed Green functions. This technique allows to study topological properties of non - dissipative transport in non - homogeneous systems including effects of interactions.

        Speaker: Mikhail Zubkov (Ariel University, Israel and ITEP, Russia)
      • 62
        Electric conductivity in gauge theory with finite-density dynamical fermions

        We study the dependence of electric conductivity on fermion chemical potential in finite-density $SU(2)$ gauge theory with $N_f = 2$ flavours of rooted staggered sea quarks and with Wilson-Dirac and Domain Wall valence quarks. We concentrate in particular on the vicinity of the crossover between the high-temperature and the low-temperature regimes, where we find the low-frequency electric conductivity to be most sensitive to small changes in fermion density. An estimate of the second derivative $\frac{T^2}{\sigma} \, \frac{\partial^2 \sigma}{\partial \mu^2} \sim 0.05$ is obtained. On the other hand, in the diquark condensation phase at low temperatures and large values of $\mu$ the conductivity quickly grows with chemical potential. As a by-product of our study we confirm the conclusions of previous studies with higher pion masses that for $SU(2)$ gauge theory the ratio of crossover temperature to pion mass $T_c/m_{\pi}$ is significantly smaller than in real QCD.

        Speaker: Pavel Buividovich (Regensburg University)
    • 10:30 AM
      Coffee Break
    • Parallel session: Cosmology, Astrophysics, Gravity, Mathematical Physics Room 3

      Room 3

      • 63
        AugerPrime - The upgrade of the Pierre Auger Observatory

        Ultra-high-energy cosmic rays (UHECRs) are studied with giant ground-based detectors recording extensive air showers, cascades of secondary particles, induced by cosmic ray particles in the atmosphere. Research at the Pierre Auger Observatory - the largest of such detectors ever built - largely contributed to a number of breakthroughs and dramatically advanced our understanding of UHECRs. Nonetheless, the results so far are still inconclusive as neither have the sources of these most energetic particles known in the Universe been determined, nor has the origin of the unambiguously established cosmic ray flux suppression above 40 EeV been fully understood. At the same time, precise measurements of the muon component of the extensive air showers on the ground show discrepancies with the predictions of hadronic interaction models. The explanation of these puzzles, which are closely related to each other, is one of the most important goals of modern astrophysics.

        The results obtained by the Pierre Auger Observatory indicate that further advances in the understanding of UHECRs require an improvement of the measuring capabilities of existing detectors, where the key feature is a superior separation of the muonic and electromagnetic components of air showers. AugerPrime, the ongoing upgrade of the Pierre Auger Observatory has been designed for this task. As part of the upgrade, almost all of the 1661 water-Cherenkov detectors, composing the 3000 km2 of the surface array of the Observatory, will be instrumented with additional scintillator and radio detector units. Moreover, new, faster and more precise acquisition electronics will be installed in all surface detectors. The main objective of the AugerPrime is to enhance the sensitivity of our analyses to the masses of cosmic rays, which will help to elucidate the origin of the UHECRs. In this talk we overview the main features of the AugerPrime design, its current status, and discuss the goals and potential capabilities of the upgraded Observatory.

        Speaker: Jaroslaw Stasielak
      • 64
        "Physics prospects with DAMIC-M"

        The DAMIC-M (Dark Matter In CCDs at Modane) experiment is a low-energy threshold CCD experiment with 1kg of sensitive mass that is sensitive to low-mass dark matter such as WIMPs and interactions with electrons through a hidden sector. It is 10 times larger mass, 50 times lower background, and 10 times lower energy threshold than DAMIC@SNOLAB, allowing it to probe dark matter for cross-sections that are theoretically motivated based by cosmological models. The talk will highlight its sensitivity to electron scattering and absorption for heavy and light hidden-photon mediators, as well as prospects for nuclear recoils. A DAMIC-M prototype known as the low-background chamber will be installed at the end of 2020 and will collect data to demonstrate the test aspects of design and also produce world-leading scientific results. Long-term prospects for a 10kg CCD experiment called OSCURA will also be discussed.

        Speaker: Ben Kilminster (Universitaet Zuerich (CH))
      • 65
        Particle physics in cosmic rays

        The Pierre Auger Observatory is the world's largest detector of the ultra high energy cosmic rays (UHECRs). It uses a series of fluorescence telescopes and an array of particledetectors at the ground to obtain detailed measurements of the energy spectrum, mass composition and arrival directions of primary cosmic rays (above the energy of 1017 eV) with accuracy not attainable until now.

        Observations of extensive air showers performed by the Pierre Auger Observatory can also be used to probe hadronic interactions at high energy, in a kinematic and energy region not accessible by human-made accelerators. Indeed, exploiting Auger data, we reach center-of-mass energies up to √s∼400 TeV, i.e. more than 30 times of those attainable at the LHC, and explore interactions in the very forward region of phase space on targets of atomic mass of 14. In addition, a precise measurement of the muon component of air showers at the ground is more sensitive to the details of the hadronic interactions along many steps of the cascade development, such as the multiplicity of the secondaries and the fraction of electromagnetic component with respect to the total signal. On the contrary, the intrinsic muon fluctuations mostly depend on the first interaction.

        In this talk we overview the new Auger studies exploring the connection between the dynamics of the air shower and the multi-particle production, and how this knowledge can be translated into constraints of the high energy hadronic models as well as direct measurements, complementary to, and beyond the reach of, accelerator experiments.

        Speaker: Dr Dariusz Gora (Institute of Nuclear Physics PAN)
      • 66
        Anisotropies in the arrival directions of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory

        The search for anisotropies in the arrival directions of cosmic rays of the highest energies is essential in the on-going effort to identify their sources. After more than 15 years of operation, the exposure of the Pierre Auger Observatory exceeds 100,000 km^2 sr yr and several important scientific findings regarding anisotropy studies on various angular scales have been reported.
        In the large-scale regime, a dipolar modulation above an energy threshold of 8 EeV was discovered with a significance exceeding the 5\sigma confidence level. The dipole exhibits an amplitude of 6.6^{+1.2}_{-0.8}\% and its maximum points ~125^\circ away from the Galactic center, thus providing observational evidence for an extragalactic origin of the highest-energy cosmic rays. The analysis of the equatorial component was extended to lower energies of ~0.03 EeV where the dipole phase changes towards the Galactic center. However, none of the lower-energy amplitudes is yet significant.
        At the highest energies, searches for small- and intermediate-scale anisotropies were performed. A model-independent search for overdensities as well as a correlation study with the direction of the nearby radio galaxy Cen A was conducted. The latter analysis yields a one-sided post-trial significance of 3.9 \sigma for energies above 37 EeV on an angular scale of 28^\circ. Additionally, comparisons to four catalogs of candidate sources were performed using a maximum likelihood analysis. The comparison of the cosmic-ray arrival directions to a sample of starburst galaxies results in the highest post-trial significance, which lately surpassed the 4.5 \sigma confidence level above 38 EeV.

        Speaker: Teresa Bister (RWTH Aachen University)
      • 67
        Telescope Array Summary

        Telescope Array (TA) is the largest ultra-high-energy cosmic ray (UHECR) observatory in the northern hemisphere and has entered its thirteenth year of exploring astrophysical phenomena at the highest energies. It covers more than 700 km^2 of the Utah desert and consists of a 1.2 km spaced grid of 507 surface detector (SD) scintillation counters along with three fluorescence detector (FD) sites looking inward over the surface array. The TA Low Energy Extension (TALE) has collected over six years of data and consists of an FD site with a 400 m to 600 m spaced SD infill array that allows UHECR detection over an unprecedented five decades of energy (0.002 EeV to 200 EeV). Recent results that indicate extragalactic anisotropies in arrival directions and energies of UHECR are presented as well as updated measurements of the energy spectrum, the primary particle composition, an updated proton-air inelastic cross-section, upper limits on photon and neutrino fluxes, and terrestrial gamma-ray observations. Additionally, TA is currently expanding to TAx4 to cover a four times larger area for greater statistics at the highest energies. Two new FD sites are in place and more than half of the new SDs on 2.08 km spaced grid have been deployed. Preliminary observations from the new FD sites will also be shown.

        Speaker: Jon Paul Lundquist (University of Utah)
      • 68
        Enhancing the understanding of fragmentation processes in hadrontherapy and radioprotection in space with the FOOT experiment

        Proton therapy treatments are based on the characteristic depth-dose deposition profile of charged particles (i.e. the Bragg Peak). During treatment, target fragmentation takes place, leading to the production of low-energy, high-charge and therefore short-range fragments along the beam path. The higher-Z fragments produced may have higher biological effectiveness compared to protons, thus affecting the proton Relative Biological Effectiveness (RBE, i.e. biological effectiveness of protons compared to photons), nowadays assumed as a constant value (i.e. RBE=1.1) in clinical practice. In this context, precise fragmentation cross section data would be of great importance in order to further optimize proton treatments. At the same time, such data would help improving the design of the shielding of spaceships, especially in view of long distance travels (i.e., Mars human exploration).
        The FOOT (FragmentatiOn Of Target) experiment has been designed to measure fragment production cross sections with $\approx$5% uncertainty. Target fragmentation induced by 50-250 MeV proton beams will be studied taking advantage of an inverse kinematic approach. Specifically,16O, 12C and 4He beams impinging on different targets (e.g., $C_2$, $C_2$$H_4$) will be employed, thus boosting fragments’ energy and making their detection possible. Fragmentation cross section of hydrogen will be then obtained by subtraction. The same configuration also allows measuring the projectile fragmentation of the mentioned beams using direct kinematics, improving the accuracy of the transport Monte Carlo codes presently used for both hadrontherapy and space applications.
        A dedicated “table-top” electronic setup was conceived. The setup consists in a pre-target monitor region, a magnetic spectrometer, a ΔE detector with TOF capabilities and a calorimeter. The detectors will be used to measure the fragments momenta, ΔE, TOF and kinetic energy. Alternatively, an emulsion spectrometer was designed in order to measure the production of low Z fragments that wouldn't cross the whole magnetic spectrometer.
        The final design of the experiment will be presented together with performances in the cross section evaluation and neutrons detection capability at different energy ranges of interest for radiotherapy and space radiation protection.

        Speaker: Sofia Colombi (University of Trento)
    • Parallel session: High Energy Particle Physics Room 2

      Room 2

      • 69
        Pushing the Frontier in Measuring the Mass of the Lightest Lepton: Results from the Karlsruhe Tritium Neutrino Experiment

        The determination of the neutrino mass is one of the major challenges in particle physics today. Experiments, based solely on the kinematics of β-decay, provide a largely model-independent probe to the neutrino mass scale. The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to directly measure the effective electron antineutrino mass with a sensitivity of 0.2 eV (90% CL). It employs a cryogenic, highly pure, molecular tritium source providing a high luminosity of signal electrons. It is coupled to a high-resolution, integrating spectrometer for energy analysis. In this talk we present the principle of the measurement as well as how it was technically realised in a 70-m long beamline. Subsequent to a sequence of commissioning measurements, in 2019 the first neutrino mass run took place which will be discussed in detail. Our blind analyses allowed us to set an upper limit of 1.1 eV on the neutrino-mass scale at a 90% confidence level. This first result, based on a few weeks of running at a reduced source intensity and dominated by statistical uncertainty, improved on prior limits by nearly a factor of two. Finally, the talk will conclude with an outlook on future neutrino mass campaigns and on studies aiming to probe new physics theories (like sterile neutrinos) from the recorded high-resolution tritium β-spectra.

        Speaker: Magnus Schlösser (Karlsruhe Institute of Technology (KIT))
      • 70
        The physics potentials of JUNO

        The Jiangmen Underground Neutrino Observatory is a next-generation neutrino experiment under construction in Southern China. The detector is filled with 20 kton liquid scintillator and will be built in a 700m deep underground laboratory. The central detector is equipped with ~18K 20-inch PMTs and ~25K 3-inch PMTs with the photocathode coverage reaching ~78%. The experiment has been designed to reach an unprecedented energy resolution of 3% at 1 MeV for the neutrino mass hierarchy determination. Besides the main physics goal, JUNO will also contribute to various other areas. These include the measurement of neutrino oscillation parameters to the sub-percent precision, detecting geo, solar, atmospheric neutrinos, and monitoring the neutrino sky for transient phenomena such as supernovae. In addition, the detector will be a perfect observatory for the proton decay search. This talk will provide an overview of the physics potentials of the experiment.

        Speaker: Mr Haoqi Lu (Institute of High Energy Physics, CAS, China)
      • 71
        Latest Results from the Daya Bay Experiment

        The Daya Bay Reactor Neutrino Experiment is designed to measure short baseline oscillation of electron antineutrinos coming from six 2.9 GWth nuclear reactors. In 2012, it announced the world’s first measurement of a non-zero value for the neutrino mixing angle θ13. Since then, an unprecedented sample of nearly 4 million reactor antineutrino candidates has been acquired resulting in the most precise measurement of θ13 up to date. The experiment also searched for light sterile neutrinos together with the MINOS+ experiment, setting world-leading limits on sterile neutrino mixing. In addition, Daya Bay provides precise measurements of total and isotopic reactor antineutrino flux and spectrum. The latest Daya Bay results and prospects will be presented in this talk.

        Speaker: Tadeas Dohnal
      • 72
        Searches for the neutrinoless double beta decay with GERDA – latest results.

        The GERDA experiment, located in the underground Laboratori Nazionali del Gran Sasso in Italy, has been designed to search for the neutrinoless double-beta (0vbb) decay in 76Ge. It used in different stages of the project up to 44 kg of high purity germanium (HPGe) detectors enriched up to about 86% in the isotope 76Ge. The bare detectors were operated in liquid argon, which served in the first phase as a passive and later, in the second phase of the experiment, also as an active shield. The combination of powerful background suppression techniques (liquid argon veto and pulse shape discrimination) together with excellent energy resolution of HPGe detectors allowed GERDA to be the first background-free (less than 1 background event expected in the region of interest) 0vbb decay experiment. After about 5 years of data taking together in Phase I and Phase II more than 100 kg*yr of data has been accumulated, as foreseen in the original proposal. Combining all available data no signal is observed, and a lower limit on the half-life of the 0νββ decay in 76Ge is set at T1/2 > 1.8 x 10^26 yr at 90% C.L, which is presently the strongest limitation. In the talk the design of the experiment and details of the data analysis will be presented. A prospect for the successor Legend-200 experiment will be outlined as well.

        Speaker: Grzegorz Zuzel (Jagiellonian University in Krakow)
      • 73
        Neutrino Oscillation Results from the MINOS+ Experiment

        Neutrino Oscillation Results from the MINOS+ Experiment will be presented.

        Speaker: Dr Anna Holin
    • Parallel session: Multidisciplinary Session Room 1

      Room 1

      • 74
        Studies of low-energy K$^{-}$- nucleus/nuclei interactions with light nuclei by AMADEUS

        The experimental investigation of the low-energy negatively charged kaons interaction with the nuclear matter is very important to understand the strength of the K$^{-}$ nuclei interaction and to provide essential input to the non-perturbative QCD in the strangeness sector. This study has important consequences in various sectors of physics, like nuclear and particle physics, as well as astrophysics.

        The AMADEUS collaboration aims to provide new experimental contraints to the K$^{-}$-N strong interaction in the regime of non-perturbative QCD, exploiting low-energy K$^{-}$ hadronic interactions with light nuclei (e.g. H, $^{4}\hspace{-0.03cm}$He, $^{9}\hspace{-0.03cm}$Be and $^{12}\hspace{-0.03cm}$C). The investigations are mainly focused on Λ(1405) properties studies and clarification of an existence of deeply bound kaonic states. The studies are performed with low-momentum kaons ($p_K$∼127 MeV/c) produced at the DAΦNE collider of LNF-INFN, ideal to explore both stopped and in-flight K$^{-}$ nuclear captures. The KLOE detector is used as active target, allowing to achieve excellent acceptance and resolutions for the data.

        In the talk the results obtained from the recent AMADEUS studies will be presented.

        Speaker: Magdalena Skurzok (INFN-LNF Frascati)
      • 75
        Partial wave analysis of $J/\psi \to K^+K^-\pi^0$

        The recent results of the partial-wave analysis of $J/\psi \to K^+K^-\pi^0$ reaction using $(223.7\pm1.4)\times 10^{6}$ $J/\psi$ decays collected by BESIII Collaboration in 2009 will be presented. The high data quality and unprecedented statistics of the BESIII experiment allowed revealing signals that had not been observed previously in $J/\psi$ decays. The reported results for $K^*(892)^\pm$ and $K^*_2(1430)^\pm$ parameters are currently the most precise. The $K^*_2(1980)^\pm$ and $K^*_4(2045)^\pm$ resonances are observed for the first time in $J/\psi$ decays. Two resonance signals in the $K^+K^-$ channel are also reported and their interpretation will be discussed. Results also include branching fractions for decays through intermediate states and a high precision measurement of $B(J/\psi \to K^+K^-\pi^0)$. The results of the partial-wave analysis differ significantly from those previously obtained by BESII and BABAR.

        Speaker: Igor Denisenko (Joint Institute for Nuclear Research (RU))
    • Workshop on Lattice and Condensed Matter Physics Room 1

      Room 1

      • 76
        Measuring Axial Gauge Fields with a Calorimeter in a Weyl semimetal

        Torsional strain in Weyl semimetals excites a unidirectional chiral density wave propagating in the direction of the torsional vector. This gapless excitation, named the chiral sound wave, is generated by a particular realization of the axial anomaly via the triple-axial (AAA) anomalous diagram. We show that the presence of the torsion-generated chiral sound leads to a linear behavior of the specific heat of a Weyl semimetal and an enhancement of the thermal conductivity at experimentally accessible temperatures. We also demonstrate that such an elastic twist lowers the temperature of the sample, thus generating a new, anomalous type of elasto-calorific effect. Measurements of these thermodynamical effects could provide experimental verification of the exotic triple-axial anomaly as well as the reality of the elastic pseudomagnetic fields in Weyl semimetals.

        Speaker: Dr Maxim Chernodub (University of Tours, CNRS)
      • 77
        Nonperturbative Casimir Effects in Lattice Gauge Theories

        We review recent studies of the Casimir effect in non-perturbative regimes within the lattice gauge field theory. The Casimir effect is a quantum phenomenon rooted in the fact that quantum fields' vacuum fluctuations are affected by physical objects and boundaries. As the energy spectrum of vacuum fluctuations depends on distances between (and geometries of) physical bodies, the quantum vacuum exerts a small but experimentally detectable force on neutral objects. Usually, the associated Casimir energy is calculated for free or weakly coupled quantum fields. We discuss the lattice formulation of the Casimir effect, which allows us to extend its study to the strong coupling regime with different boundary conditions and Casimir boundaries' geometry. We consider vacuum restructuring in finite geometries - the influence of Casimir boundaries on chiral and deconfining phase transitions and mass scales.

        Speaker: Alexander Molochkov (Far Eastern Federal University)
      • 78
        Chiral separation effect for fermions with spin 3/2

        We disscuss Chiral Separation Effect in case of fermions with spin-3/2. We discuss two types of fermions - relativistic Rarita-Schwinger fermions and quasispin 3/2 fermions in semimetals. In all cases coefficients in the conductivity of the chiral separation effect and in the axial anomaly coincide

        Speaker: Захар Викторович Хайдуков
      • 79
        Chiral Separation effect in non - homogeneous systems

        We discuss chiral separation effect in the systems with spatial non - homogeneity. It may be caused by non - uniform electric potential or by another reasons, which do not, however, break chiral symmetry of an effective low energy theory. Such low energy effective theory describes quasiparticles close to the Fermi surfaces. In the presence of constant external magnetic field the non - dissipative axial current appears. It appears that its response to chemical potential and magnetic field (the CSE conductivity) is universal. It is robust to smooth modifications of the system and is expressed through an integral over a surface in momentum space that surrounds all singularities of the Green function. In itself this expression represents an extension of the topological invariant protecting Fermi points to the case of inhomogeneous systems.

        Speaker: Michael Suleymanov (Ariel University)
    • 1:40 PM
    • 4:00 PM
      Coffee Break
    • Parallel session: Cosmology, Astrophysics, Gravity, Mathematical Physics Room 1

      Room 1

      • 80
        Latest results from LUNA experiment

        Accurate knowledge of thermonuclear reaction rates is a fundamental ingredient in nuclear astrophysics for understanding the energy generation, neutrino production and the synthesis of the elements in stars and during primordial nucleosynthesis. At astrophysical energies, the cross section of nuclear processes is extremely small and the cosmic background prevents their measurement at stellar energies on Earth's surface. An underground location is extremely advantageous for such studies, as demonstrated by the LUNA (Laboratory for Underground Nuclear Astrophysics) experiment in the Gran Sasso Laboratory (Italy). Here, 1400 meters of rocks act as a natural shield against cosmic radiation, suppressing the background by orders of magnitude.
        In the present contribution, the latest results achieved by LUNA and the ongoing activities will be reported. Furthermore, an overview of the future researches in the framework of the LUNA-MV project, which aims at measuring several key reactions of the Helium and Carbon burning, will be also given.

        Speaker: Francesco Barile (INFN Sezione di Bari)
      • 81
        New results from the CUORE experiment

        The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double-beta (0νββ) decay that has been able to reach the one-ton scale. The detector, located at the Laboratori Nazionali del Gran Sasso in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. Following the completion of the detector construction in August 2016, CUORE began its first physics data run in 2017 at a base temperature of about 10 mK. Following multiple optimization campaigns in 2018, CUORE is currently in stable operating mode. In 2019, CUORE released its 2nd result of the search for 0νββ corresponding to a TeO2 exposure of 372.5 kg∙yr and a median exclusion sensitivity to a 130Te 0νββ decay half-life of 1.7 × 10^25 yr. We find no evidence for 0νββ decay and set a 90% C.L. Bayesian lower limit of 3.2 × 10^25 yr on the 130Te 0νββ decay half-life. In this talk, we present the current status of CUORE's search for 0νββ, as well as review the detector performance. We finally give an update of the CUORE background model and the measurement of the 130Te two neutrino double-beta (2νββ) decay half-life.

        Speaker: Dr Irene Nutini (University and INFN section of Milano Bicocca)
      • 82
        Measurement of CNO neutrinos with Borexino

        Borexino is a large solar neutrino detector running at the Laboratori Nazionali del Gran Sasso since 2007. Neutrinos are detected via their interaction with a 300-ton liquid scintillator target, purified to achieve unprecedented levels of radio-purity. Borexino has detected most of the expected solar neutrino spectrum. In particular, it has measured with refined precision the neutrinos from the entire pp fusion chain in the Sun using analysis tools that fully exploit our understanding of the detector. Most recently, Borexino has made the first measurement of solar CNO neutrino, produced in a catalytic hydrogen fusion cycle enabled by the presence in the solar plasma of heavier elements, or “metals”. This observation caps almost 15 years of data taking and experimentally proves validity of the pioneering solar modeling by Hans Bethe.

        Speaker: Andrea Pocar (University of Massachusetts, Amherst)
      • 83
        Status of the MAJORANA DEMONSTRATOR experiment

        Neutrinoless double beta decay searches play a major role in determining neutrino properties. The
        MAJORANA Collaboration is operating an ultra-low background, modular high-purity Ge detector array to search for this decay in $^\mathrm{76}$Ge. Located at the 4850-ft level of the Sanford Underground Research Facility, the DEMONSTRATOR's goal is to achieve a background rate low enough to support the design of a future tonne-scale $^\mathrm{76}$Ge experiment.
        The experiment has achieved an energy resolution of ~2.5 keV FWHM at the Q-value, which is the best among all double-beta decay experiments. The excellent energy resolution and ultra-low background allows the DEMONSTRATOR to establish stringent limits double-beta decay to excited states, and physics beyond the Standard Model searches, such as bosonic dark matter and axions.

        In this talk, I will show recent results of a hardware upgrade. I also will give an overview on improved analysis methods and report on the progress in developing a complete background model of the MAJORANA DEMONSTRATOR. I will present recent results, and discuss what the prospects for a future ton-scale experiment are.

        Speaker: Dr Ralph Massarczyk (Los Alamos National Laboratory)
    • Parallel session: High Energy Particle Physics Room 3

      Room 3

      • 84
        Azimuthal asymmetries and transverse momentum dependent distributions of charged hadrons at COMPASS

        During the DVCS data-taking in 2016 and 2017, the COMPASS Collaboration at CERN collected a large sample of DIS events with a longitudinally polarized 160 GeV/$c$ muon beam scattering off a liquid hydrogen target. Part of the collected data has been analysed to extract preliminary results for the transverse momentum dependent charged hadron distributions and the azimuthal asymmetries $A_{UU}^{\cos\phi_h}$, $A_{UU}^{\cos 2\phi_h}$ and $A_{LU}^{\sin \phi_h}$. Both distributions and azimuthal asymmetries can be related to the intrinsic transverse momentum $k_{T}$ of the quarks, while $A_{UU}^{\cos\phi_h}$ and $A_{UU}^{\cos 2\phi_h}$ are also related to the still unknown Boer-Mulders transverse momentum dependendent parton distribution function $h_{1}^{\perp}$.

        In this talk, new preliminary results from the 2016 data will be shown for both the $P_T^2$ - dependent distributions and the azimuthal asymmetries. It is found that the unpolarised azimuthal asymmetries exhibit strong kinematic dependences and, together with the transverse momentum dependent distributions, are found to be in good agreement with the published COMPASS results on deuteron. The contribution of exclusive diffractive processes to the measured asymmetries and distributions will be discussed.

        Speaker: Andrea Moretti (Universita e INFN Trieste (IT))
      • 85
        Study of double J/\psi production mechanisms at COMPASS

        During the past 40 years the production of pairs of the J/psi mesons in high energy hadron collisions has been studied by several experiments. Despite the experimental and theoretical effrots, the origin of the process and the relative weight of different production mechanisms still remains unknown. Depending on the energy scale the double J/psi production can be described by single- and double-parton scattering sub-processes and gluon-gluon fusion or quark-antiquark annihilation mechanisms. The process can also be related to the hypothesis of the intrinsic charm of hadrons and the existence of exotic tetraquark states which were predicted by various theoretical models and have recently been observed by the LHCb experiment.

        To study dimuon reactions the COMPASS experiment at CERN uses a 190 GeV/c neagtive pion beam impinging on different nuclear targets. In this talk, first preliminary COMPASS results on J/psi pair production will be presented. The study of double J/\psi production mechanisms will be discussed.

        Speaker: Andrei Gridin (Joint Institute for Nuclear Research (RU))
      • 86
        The wake of jets from linearized hydrodynamics

        A jet is a group of collimated high energy particles. Its production in high energy collisions has been used to study the QCD evolution in vacuum. The evolution is modified in heavy ion collisions because of the existence of quark-gluon plasma (QGP). Jets are produced early in the initial hard scattering. As the produced quarks and gluons of the jets travel through the QGP, they lose energy and get kicked transversely by interacting with the QGP. As a result, the jet production in heavy ion collisions is suppressed (a phenomenon called jet quenching) with a broader transverse momentum distribution. So we can learn the QGP properties by studying jets.

        Recently, jet substructure observables have been widely used in the study of jets. Some observables are sensitive to the wide angle soft particles within the jet, for example, the Lund plane distribution with different jet radii and soft drop parameters. For these observables, the effect from the wake of jets becomes crucial. As the jet loses energy and momentum during the evolution inside the QGP, these energy and momentum depositions will evolve inside the medium and hadronize into particles in the end. These produced particles are correlated with the jet direction and may be grouped into the jet by the reconstruction algorithm. Since these particles are generally soft with wide angles with respect to the jet axis, they can significantly modify those jet substructure observables that are sensitive to the soft physics. Therefore, it is important to understand how the medium responds to the wake of jets.

        In this talk, we will try to address this question by treating the energy and momentum loss as perturbation in the background of a Bjorken flow. By expanding the perturbation to the linear order and solving the resulting evolution equations numerically in the momentum space, we study how the wake evolves inside the QGP. We will also discuss the impact of the wake on phenomenological observables and effect of the transverse flow.

        Speaker: Dr Xiaojun Yao (Massachusetts Institute of Technology)
    • Workshop on Lattice and Condensed Matter Physics Room 2

      Room 2

      • 87
        Hall conductivity as the topological invariant in phase space in the presence of interactions and non-uniform magnetic field

        The quantum Hall conductivity in the presence of constant magnetic field may be represented as the topological TKNN invariant. Recently the generalization of this expression has been proposed for the non - uniform magnetic field. The quantum Hall conductivity is represented as the topological invariant in phase space in terms of the Wigner transformed two - point Green function. This representation has been derived when the inter - electron interactions were neglected. It is natural to suppose, that in the presence of interactions the Hall conductivity is still given by the same expression, in which the non - interacting Green function is substituted by the complete two - point Green function including the interaction contributions. We prove this conjecture within the framework of the 2+1 D tight - binding model of rather general type using the ordinary perturbation theory.

        Speaker: Chunxu Zhang (Ariel University)
      • 88
        Phase transitions in graphene - the effect of anisotropy

        We study the effect of anisotropy on dynamical gap generation in graphene. We work with a low energy effective theory obtained from a tight-binding Hamiltonian expanded around the Dirac points in momentum space. The resulting continuum quantum field theory is called reduced quantum electrodynamics (RQED 3+1). The theory is strongly coupled, and we use a non-perturbative Schwinger-Dyson approach. Anisotropy is introduced through the fermi velocity of the electronic quasi-particles. Our results show that the critical coupling depends only weakly on the anisotropy parameter, and increases with greater anisotropy.

        Speaker: Margaret Carrington (Brandon University)
      • 89
        Exact instantons and their interactions in Hubbard model

        We report results from an extensive study of the Lefschetz thimbles decomposition for the Hubbard model on the hexagonal and square lattices. This study, which employs continuous auxiliary fields and the gradient flow with exact evaluation of fermionic determinant, allowed us to construct the complete Lefschetz thimbles decomposition of the model. We found all important saddle points of the action and classified them through the notion of multi-instanton field configurations. A rigorous definition of the interaction of these instantons is proposed, through the careful numerical study of the behaviour of degenerate saddle points. We show how the Lefschetz thimbles decomposition changes across the phase transition. Finally, we construct the multi-instanton partition function and show how it can describe some important physical features of the model.

        Speaker: Dr Maksim Ulybyshev (University of Würzburg)
      • 90
        Precise Wigner-Weyl calculus for lattice models

        A new version of exact Wigner-Weyl calculus for tight-binding lattice models is proposed and discussed in detail. It allows to express various physical quantities through Weyl symbols of Green’s functions. Hall conductivity this way is represented using the proposed formalism as a topological invariant including the non-homogenous systems.

        Speaker: Ignat Fialkovskiy (Ariel University, Israel, UFABC, Brazil)
    • Semiplenary Room 1

      Room 1

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    • Workshop on New physics paradigms after Higgs and gravitational wave discoveries Room 3

      Room 3

      • 91
        Turbulence as Statistical Field Theory

        The Turbulence in incompressible fluid is represented as a Field Theory in 3 dimensions. There is no time involved, so this is intended to describe stationary limit of the Hopf functional.
        The basic fields are Clebsch variables defined modulo gauge transformations (symplectomorphisms).
        Explicit formulas for gauge invariant Clebsch measure in space of Generalized Beltrami Flow compatible with steady energy flow are presented.
        We introduce a concept of Clebsch confinement related to unbroken gauge invariance and study Clebsch instantons: singular vorticity sheets with nontrivial helicity. This is realization of the "Instantons and intermittency" program we started back in the 90ties.
        These singular solutions are involved in enhancing infinitesimal random forces at remote boundary leading to critical phenomena.
        The resulting symmetric exponential distribution for PDF of velocity circulation $\Gamma$ fits the numerical simulations including pre-exponential factor $1/\sqrt{|\Gamma|}$.

        Speaker: Alexander Migdal (NYU)
    • Plenary Room 1

      Room 1

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      • 92
        PHENIX Heavy Ion Overview

        The PHENIX detector at RHIC recorded heavy-ion data for 16 years, recently ending its run in 2016. The new sPHENIX detector currently being developed will be built in its place. Although PHENIX is no longer actively running, the last three years of operation collected data in a wide range of different collision systems: $p$+$p$, $p$+Al, $p$+Au, $^{3}$He+Au, and Au+Au, which are still being analyzed. Recent results have focused on small system studies and flow, as well as open heavy flavor measurements, direct photon yields, hadron nuclear modification including $\phi$?mesons and J/$\psi$, jet modification with two-particle correlations, and jet reconstruction. Here we present a collection of these analyses PHENIX has approved for preliminary or publication since the last International Conference on New Frontiers in Physics.

        Speaker: Krista Smith (Florida State University)
    • Concert per Internet, "Sacred Music"
      • 93
        Chamber and Greek music, concert per Internet. Artists: Kalliopi Petrou (soprano), Tommaso Dorigo (piano).

        Chamber & Greek Music Gala

        Speakers: Tommaso Dorigo (Universita e INFN, Padova (IT)), Kalliopi Petrou
    • Plenary Room 1

      Room 1

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      • 94
        Highlights from the Pierre Auger Observatory

        The Pierre Auger Observatory is the largest detector ever built to study the properties of ultra-high energy cosmic rays (UHECRs). Due to an unprecedented exposure accumulated since the start of the operation in 2004 and the use of the combination of the Fluorescence and Surface Detectors, the data set recorded by the Observatory is unrivaled both in size and quality. In these proceedings we present the highlights from the Pierre Auger Observatory regarding the most recent results on the energy spectrum, mass composition, arrival directions, nuclear interactions of the UHECRs and searches for neutral particles. In addition, we report on the observations of about 1600 transient luminous events known as elves with the Fluorescence Detector of the Observatory.

        Speaker: Dr Alexey Yushkov (Institute of Physics AS CR, Prague)
      • 95
        Experimental searches for rare alpha decays

        R. Bernabei
        Universita’ e INFN Roma Tor Vergata


        A very interesting topic of nuclear physics is the study of nuclear instability, which played so far an important role in the foundation and development of nuclear physics. In fact, it can offer information about the nuclear structure, the nuclear levels and the properties of nuclei. Here a review of recent experimental searches for rare alpha decays will be presented. During the last years, the improvements in experimental techniques and the availability of deep underground locations for the experiments have allowed suitable investigations of rare alpha decays, and the observation of some previously unseen (because of their long half-lives: 10^15 –10^20 yr) ones. Experimental aspects, results and perspectives will be outlined.

        Speaker: Prof. Rita Bernabei (University and INFN Roma Tor Vergata)
      • 96
        QGP at finite chemical potential in and out-of equilibrium

        We review the properties of the strongly interacting quark-gluon plazma (QGP) created in heavy-ion collisions at ultrarelativistic energies, i.e. out-of equilibrium, and compare them to the equilibrium case. The description of the strongly interacting (non-perturbative) QGP in equilibrium is based on the effective propagators and couplings from the Dynamical QuasiParticle Model (DQPM) that is matched to reproduce the equation-of-state of the partonic system above the deconfinement temperature Tc from lattice QCD. We study the transport coefficients such as the ratio of shear viscosity and bulk viscosity over entropy density, diffusion coefficients, electric condactivity etc. versus temperature and baryon chemical potential. Based on a microscopic transport description of heavy-ion collisions we discuss which observables are sensitive to the QGP creation and its properties.

        Speaker: Elena Bratkovskaya (GSI, Darmstadt & Uni. Frankfurt)
      • 97
        Cluster formation in high energy heavy ion collisions

        Cluster formation has been observed in high-energy heavy ion collisions at midrapidity. This phenomenon is presently highly debated because the transverse energy spectra at midrapidity show an inverse slope parameter of more than 100 MeV and look rather thermal. In such an environment, it is no expected that clusters with binding energies of below 10 MeV per nucleons can be created or can survive. With our newly developed code, the parton hadron quantum molecular dynamics (PHQMD) approach, a n-body theory which allows for the investigation of clusters we study cluster in the energy range from a couple of AGeV to RHIC energies and discuss how clusters can be formed there.

        Speaker: Prof. Joerg Aichelin (Subatech)
    • 10:30 AM
      Coffee Break
    • Parallel session: Cosmology, Astrophysics, Gravity, Mathematical Physics Room 3

      Room 3

      • 98
        The SABRE experiment

        The dark matter interpretation of the DAMA/LIBRA annual modulation signal represents a long standing open question of the Astro-particle physics field. The SABRE experiment aims to test such claim bringing the same detection technique to an unprecedented sensitivity. Based on ultra-low background NaI(Tl) scintillating crystals as DAMA, SABRE features a liquid scintillator veto system, surrounding the main target, and it deploys twin detectors: one in the Northern hemisphere at Laboratori Nazionali del Gran Sasso, Italy (LNGS) and the other, first of its kind, in the Southern Hemisphere, in the Stawell Underground Physics Laboratory (SUPL). The first very-high purity crystal produced by the collaboration was shipped to LNGS in 2019 for characterization. It features a potassium contamination of the order of 4 ppb, about 3 times lower than DAMA/LIBRA crystals, measured by inductively coupled plasma mass spectroscopy (ICP-MS). The first phase of the SABRE experiment is a Proof of Principle (PoP) detector to be operated inside a liquid scintillator veto at LNGS. This talk will present the results of the stand-alone characterization of the first SABRE high-purity crystal, as well as the status of the PoP detector, which was commissioned early in the summer of 2020.

        Speaker: Andrea Zani (Università degli Studi e INFN Milano (IT))
      • 99
        DAMIC results on WIMP search with 11kg.day

        DAMIC (for Dark Matter In CCD) seeks for DM interaction in thick fully depleted CCDs. Thanks to the precise energy estimation, the granularity and the very low noise of these detectors, which provides an energy threshold of 50 eV electron-equivalent, DAMIC is sensitive to low mass WIMP (below 10GeV/c^2) through nuclear recoil. The data of the DAMIC at Snolab experiment with 42 grams of active detector installed in the underground laboratory of Snolab were analysed. It represents 11kg.day i.e. around 20 times more than the previous publication. We detail in this presentation the analysis steps and the results of this search directly probing the excess found by CDMS II silicon experiment with the same target nucleus.

        Speaker: Romain Gaior (LPNHE)
    • Parallel session: High Energy Particle Physics Room 1

      Room 1

      • 100
        New result on the search for the K+ —> pi+ nunu decay at the NA62 experiment at CERN

        The ultra-rare K+ —> pi+nunu decay benefits from a precisely predicted branching ratio in the SM
        (8.4 +- 1.0) x 10^{-11}, being almost free from theoretical uncertainties, and most importantly from
        a very high sensitivity to a variety of beyond-the-standard-model scenarios, making it one of the best candidates to reveal indirect effects of new physics in the flavour sector.
        The NA62 experiment at the CERN SPS, designed to measure the branching ratio of K+ —> pi+ nunu with a decay-in-flight technique, collected data in 2016-2018. New results from the analysis of 2018 data, the largest data set so far collected, will be presented. The result will represent the most accurate measurement so far achieved of this ultra-rare decay.
        Future prospects and plans for data taking from 2021 will also be presented.

        Speaker: Silvia Martellotti (INFN e Laboratori Nazionali di Frascati (IT))
      • 101
        New measurement of the K+ -> pi+ mu+ mu- decay at NA62

        The flavour-changing neutral current decay K+ -> pi+ mu+ mu- is induced at the one-loop level in the Standard Model, and is well suited to explore its structure and, possibly, its extensions. The NA62 experiment took data in 2016–2018 with the main goal of measuring the K+ -> pi+ neutrino antineutrino decay. A scaled down di-muon trigger chain was operating along with the main trigger during the whole data taking period resulting in a large sample of about 3x10^12 kaon decays in the fiducial volume recorded using the di-muon trigger. New results from an analysis of the K+ -> pi+ mu+ mu- decay using this sample will be presented.

        Speaker: Dmitri Madigozhin (Joint Institute for Nuclear Research (RU))
    • Workshop on Heavy Ion Physics Room 2

      Room 2

      • 102
        Multiplicities of light nuclear clusters in high energy nuclear collisions and solution of the hyper-triton puzzle

        I will present a new strategy [1] to analyze the chemical freeze-out of light (anti)nuclei produced in high energy collisions of heavy atomic nuclei within an advanced version of the hadron resonance gas model. It is based on two different, but complementary approaches to model the hard-core repulsion between the light nuclei and hadrons. The first approach is based on an approximate treatment of the equivalent hard-core radius of a roomy nuclear cluster and pions, while the second approach is rigorously derived here using a self-consistent treatment of classical excluded volumes of light (anti)nuclei and hadrons.
        By construction, in a hadronic medium dominated by pions, both approaches should give the same results.
        Employing this strategy to the analysis of hadronic and light (anti)nuclei multiplicities measured by ALICE at
        $\sqrt{s_{NN}} =2.76$ TeV and by STAR at $\sqrt{s_{NN}} =200$ GeV, we got rid of the existing ambiguity in the description of light (anti)nuclei data and determined the chemical freeze-out parameters of nuclei with high accuracy and confidence.
        Using this strategy we were able to resolve the long standing problem to describe the light nuclear cluster multiplicities including the hyper-triton measured by the STAR Collaboration, known as the hyper-triton chemical freeze-out puzzle [2]. It solution was found by using the value for the hard-core radius of the (anti-)$\Lambda$ hyperons which was found in our earlier works. One of the most striking results of our work [2] is that for the most probable scenario of chemical freeze-out for the STAR energy the obtained parameters allow to simultaneously reproduce the values of the experimental ratios $S_3$ and $\overline{S}_3$ which were not included in the fit. In addition we were able to elucidate some peculiar properties of the QGP bags at STAR and ALICE energies of collisions.

        [1] K. A. Bugaev, O. V. Vitiuk, B. E. Grinyuk, V. V. Sagun, N. S. Yakovenko, O. I. Ivanytskyi, G. M. Zinovjev, D. B. Blaschke, E. G. Nikonov, L. V. Bravina, E. E. Zabrodin, S. Kabana, S. V. Kuleshov, G. R. Farrar, E. S. Zherebtsova and A. V. Taranenko,
        Second virial coefficients of light nuclear clusters and their chemical freeze-out in nuclear collisions,
        arXiv:2005.01555 [nucl-th].

        [2] O. V. Vitiuk, K. A. Bugaev, E. S. Zherebtsova, D. B. Blaschke, L. V. Bravina, E. E. Zabrodin and G. M. Zinovjev,
        Resolution of hyper-triton chemical freeze-out puzzle in high energy nuclear collisions,
        arXiv:2007.07376 [hep-ph].

        Speakers: Kyrill Bugaev (Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine), Sonia Kabana (Instituto De Alta Investigacion Universidad de Tarapaca (CL))
      • 103
        Utilizing high-pT theory and data to constrain the initial stages

        Traditionally, low-$p_\perp$ sector is used to infer the features of initial stages of QGP evolution before QGP thermalization. On the other hand, recently acquired wealth of high-$p_{\perp}$ experimental data paves the way to utilize the hard probes energy loss in exploring the initial stages. We here study [1] how four different commonly considered initial-stage scenarios – which have the same temperature profile after thermalization, but differ in the temperature profile before thermalization – affect predictions of high-$p_\perp$ $R_{AA}$ and $v_2$ stemming from our DREENA framework, which is based on our state-of-the-art dynamical energy loss model. Contrary to common expectations, we obtain that high-$p_\perp$ $v_2$ is insensitive to the initial stages of medium evolution, being unable to discriminate between different conditions. On the other hand, $R_{AA}$ is sensitive to these stages, however, within the current errorbars, the sensitivity is insufficient to distinguish between different initial stages. Moreover, we also reconsider the validity of widely-used procedure of fitting the energy loss parameters, individually for each initial-stage case, to reproduce the experimentally observed $R_{AA}$. We here find that previously reported sensitivity of $v_2$ to different initial states is mainly an artifact of the $R_{AA}$ fitting procedure, which may lead to misinterpreting the underlying physics. On the other hand, if a global property, in particular the same average temperature, is imposed to test temperature profiles, high sensitivity of high-$p_\perp$ $v_2$ is regained. We however show that this sensitivity would not be a consequence of different initial, but rather final, stages. Consequently, the simultaneous study of high-$p_\perp$ $R_{AA}$ and $v_2$, with consistent energy loss parameters throughout the study and rigorously controlled temperature profiles, is necessary for imposing accurate constraints on the initial stages.

        Speaker: Dr Bojana Ilic (Blagojevic) (Institute of Physics Belgrade)
      • 104
        Impact of magnetic field on the evolution of quark gluon plasma

        The equation of state (EoS) of quark-gluon plasma (QGP) using a phenomenological model is studied with magnetic field effect. The calculations with the effective mass of quark are modified in the presence of magnetic field. The results presented using thermodynamic variables are significantly affected by effective quark mass and with the magnetic field. The model results provide EoS of QGP which are in good agreement with Lattice QCD results and also enhance appreciably as comparison to the other work. Thus, this model is successfully applied to the description of the properties of quark-gluon plasma created in the collision of nucleons and give the useful information in the study of high energy heavy-ion collisions.

        Speaker: Dr Yogesh Kumar (Deshbandhu College, University of Delhi)
      • 105
        Two-Photon Decays in a Relativistic heavy-ion collisions

        We study the two photon decays using a phenomenological model emitted from a quark-gluon plasma at high temperature. For the phenomenology of heavy-ion collisions, we present γγ emission spectra by taking into account the parametrization factors in thermal dependent quark mass. The rate of diphoton production is calculated and compared with the rate from hadronic matter. The production rate is found to increase marginally with the effect of thermal dependent quark mass. It means there is little enhancement in the results and is in good agreement with other works. The measurement of diphoton emission provides useful insights in the relevant range of mass. Therefore, a comparison rates make a useful beginning in the phenomenological study of high energy physics.

        Speaker: yogesh kumar (university of delhi, india)
    • Mini Workshop on Instruments and Methods in HEP Room 1

      Room 1

      • 106
        The upgrade of the CMS electromagnetic calorimeter: future prospects for precision timing and energy measurements at the High Luminosity LHC

        The Compact Muon Solenoid (CMS) electromagnetic calorimeter (ECAL) is made of about 75,000 scintillating lead tungstate crystals arranged in a barrel and two endcaps. The scintillation light is read out by avalanche photodiodes (APDs) in the barrel and vacuum phototriodes in the endcaps. The fast signal from the crystal scintillation, amplified and sampled at 40 MHz by the on-detector electronics, enables precision energy, as well as timing, measurements for electrons and photons. The High Luminosity upgrade of the LHC (HL-LHC) at CERN will provide unprecedented instantaneous and integrated luminosities of around 5 x 10^34 cm^-2 s^-1 and 3000/fb, respectively. An average of 140 to 200 collisions per bunch-crossing (pileup) is expected. This poses a major challenge to the CMS event reconstruction. The CMS detector is therefore undergoing an extensive Phase-II upgrade program to prepare for these demanding/severe conditions. In the barrel region of the CMS ECAL, the lead tungstate crystals will continue to perform well. The APDs which detect the scintillation light will also continue to be operational, with some increase in noise due to radiation-induced dark currents. This will be mitigated by reducing the temperature at which ECAL is operated. Nonetheless, the entire readout and trigger electronics will need to be replaced to cope with the harsh conditions and increased trigger latency requirements at the HL-LHC. The upgraded detector will have a 25 fold improved readout granularity and a sampling rate increase by a factor of 4. The upgraded ECAL will preserve the calorimeter energy resolution, and will much improve the time resolution for photons and electrons with energies above 10 GeV. The timing precision is used in important physics measurements and it is speculated that further improved time information could be exploited for pileup mitigation and for the photons assignment to the correct collision vertex. In this talk the status of the ongoing R&D activities for the ECAL upgrade will be presented.

        Speaker: Dr Cristina Biino (INFN - Torino)
      • 107
        The upgrade of the CMS detector for the High Luminosity LHC

        In order to provide the required physics performance under the challenging radiation and pileup conditions at the High Luminosity LHC, the CMS detector will undergo deep upgrades.
        Under this upgrades program the existing sub-detector systems will either be improved or replaced. Entirely new sub-detector systems will also be incorporated to provide new capabilities that are not available presently. In this oral presentation the rationale behind the planned upgrades to the CMS tracking, calorimetry, muon detectors and the new timing detector will be summarized.
        This will set the stage for the detailed presentations on these topics.

        Speaker: Dr Rajdeep Mohan Chatterjee (University of Minnesota (US))
      • 108
        Overview and recent results of the CMS Muon System Upgrade

        In view of the High Luminosity phase of the Large Hadron Collider (HL-LHC), that is expected to deliver an instantaneous luminosity 5 times higher with respect to the present value, the muon spectrometer of the CMS experiment will undergo specific upgrades targeting both the detectors and the electronics with the goal to cope with the new challenging data-taking conditions and to improve the present tracking and triggering capabilities. The detector upgrades will mainly concern the deployment of new stations based on triple gas electron multiplier (GEM) and improved resistive plate chambers (RPC) technology. The new stations, featuring improved time and spatial resolution and enhanced rate capability, will be installed in the endcap of the muon system, where the background rate is expected to be higher. Nevertheless, the simulation study demonstrates that the new stations will allow to reach higher efficiencies with a modest background rate delivered at the first trigger level. The upgrade of the electronics will target instead the present system, based on drift tubes (DT), cathode strip chambers (CSC) and RPC. Radiation-hard components, extensively tested at the Gamma Irradiation Facility (GIF++), will be installed on those detectors operating since 2008. This contribution will describe the upgrades of the different subsystems of the CMS muon spectrometer; we will report the results of the CSC electronics upgrade, the first performance of the new electronics of the DTs, assessed during the Run 2 slice test and the aging test performed on both. The production, qualification and installation of a first station based on triple-GEM detectors (GE1/1) and the first results of its commissioning will be described along with an overview of the design, R&D and first performance of new stations based on triple-GEM (GE2/1, ME0) and iRPC detectors (RE3/1 and RE4/1) that will be installed around 2023.

        Speaker: Caterina Aruta (Universita e INFN, Bari (IT))
      • 109
        Overview of the PANDA Detector design at FAIR

        PANDA (antiProton ANnihilation in DArmstadt) is the central experiment to fully exploit the physics research potential of antiproton beams at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR), currently under construction at GSI. Phase-space cooled high intensity antiproton beams up to 15 GeV/c will be provided by the High Energy Storage Ring (HESR) at FAIR to interact with PANDA internal proton or nuclear targets enabling a broad range of exciting studies in Particle and Nuclear Physics. The PANDA detector features two spectrometers, the Target Spectrometer with a superconducting solenoid magnet of 2 T around the interaction region with hermetic coverage and the Forward Spectrometer with a 2 Tm dipole magnet for coverage of the forward boosted particles. Several modern particle detector systems are employed in PANDA to provide excellent charged particle tracking, particle identification, calorimetry and muon detection, over the full momentum range in both spectrometers throughout the lifetime of the experiment. Focusing on the various PANDA detector systems we present an overview of recent developments, the detector construction progress and conclude with an outline for a phased deployment of PANDA at FAIR.

        Speaker: Dr Anastasios Belias (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
    • Semiplenary Room 3

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      • 110
        Search for dark matter with the IceCube Neutrino Observatory

        The indirect search of dark matter has been an important element in the scientific program of the IceCube since the beginning of the experiment. The IceCube Neutrino Observatory is a cubic kilometer neutrino telescope located at the South Pole which can detect the neutrino flux produced by the self-annihilation or decay of dark matter particles from regions where an over-density of dark matter is expected, such as the galactic center, the Sun, the Earth and more galactic and extra-galactic sources. IceCube results and best limits on the dark matter annihilation cross-section as well as spin-dependent dark matter nucleon interaction have significantly improved with time, leading to world-leading results in the field. This review will present the most recent IceCube results and the state of the art of indirect search of dark matter with neutrinos.

        Speaker: Mr Giovanni Renzi (ULB)
      • 111
        Dark Matter Investigation with DAMA set-ups

        Experimental observations and theoretical arguments at Galaxy and larger scales suggested that a large fraction of the Universe is composed by Dark Matter particles. This motivated the DAMA experimental efforts to investigate the presence of such particles in the galactic halo by exploiting a model independent signature and very highly radiopure set-ups deep underground. Here a review of the model independent positive results, obtained by the DAMA set-ups at the Gran Sasso National Laboratory of the INFN, will be given with some of the implications. Status and perspectives will be discussed.

        Speaker: Dr Vincenzo Caracciolo
      • 112
        Dark Sector first results at Belle II

        The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider
        is a substantial upgrade of the B factory facility at the Japanese KEK laboratory.
        The design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and
        the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more
        than its predecessor. During 2018, the machine has completed a commissioning run,
        recording a data sample of about 0.5 fb$^{-1}$. Main operations started in
        March 2019 with the complete Belle II detector: an integrated luminosity
        of 60 fb$^{-1}$ has been collected so far. These early data sets,
        with specifically designed low multiplicity triggers, offer already the
        possibility to search for a large variety of dark sector particles in
        the GeV mass range, complementary to LHC and to dedicated low energy experiments.
        The talk will review the status of the dark sector searches at Belle II, with a focus on the results from the early data.

        Speaker: Dr Marcello Campajola (INFN and University of Naples "Federico II")
      • 113
        NEWSdm: Directional Dark Matter Search with Nuclear Emulsion

        The nature of dark matter (DM) is one of the most relevant open problems both in cosmology and particle physics. Many different experimental techniques have been developed to detect Weakly Interactive Massive Particles (WIMPs) as dark matter candidates via their scattering with detector atoms. The NEWSdm experiment, located in the Gran Sasso underground laboratory in Italy, is based on a novel nuclear emulsion technology with nanometric resolution and new emulsion scanning microscopy that can detect recoil track lengths down to one hundred nanometers. Thus, NEWdm is able to reconstruct the direction of the nucleus recoiling, thus being capable of confirming the Galactic origin of the dark matter. We discuss the potentiality, both in terms of exclusion limits and discovery potential, of a directional experiment based on the use of a solid target made by newly developed nuclear emulsions and read-out systems reaching nanometric resolution. We also report the results of the test exposure conducted in Gran Sasso.

        Speaker: Antonia Di Crescenzo (Universita e sezione INFN di Napoli (IT))
    • 1:30 PM
    • 4:00 PM
      Coffee Break
    • Plenary Room 1

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      • 114
        Highlights of top-quark production cross-section measurements with ATLAS at LHC: from precision to rarity

        Top-quark production in proton-proton collisions at a center-of-mass energy of 13 TeV is measured with the data collected by the ATLAS detector over five orders of magnitude.

        The relatively large inclusive cross-section for the production of top-quark pair production is determined using events in the lepton+jets channel and it reaches a relative uncertainty of 4.6% allowing for experimental scrutiny to theoretical calculations at next-to-next-to-leading order.

        Measurements of differential cross-sections of top-quark-antiquark pair-production performed in the all-hadronic channel allow studies of the correlation between the top-quark pair system and additional jet radiation by exploiting fully-reconstructed final states. Such measurements are compared quantitatively with predictions from several setups of next-to-leading order matrix-element generators combined with parton-shower generators.

        Finally, the ATLAS collaboration recently established first evidence for the hard scattering process in which two top-quark-antiquark pairs are produced. This process is also called four-top-quarks production and is predicted to have a small cross-section of 12 fb in the standard model. Candidate events are selected if a lepton pair with the same electric charge is present or if there are at least three leptons in the event. The background is mainly given by top-quark-antiquark production in association with a W boson and heavy-flavour jets. A multivariate discriminant is used to optimize the separation between signal and background events and enhance the sensitivity.

        Speaker: Giancarlo Panizzo (INFN Gruppo collegato di Udine)
      • 115
        Searches for heavy resonances decaying into leptons at CMS

        Many models predict the existence of new, heavy resonances that may decay in leptonic final states. This talk presents results from such searches that have been carried out in CMS using the full Run2 luminosity.

        Speaker: Irene Bachiller Perea (Centro de Investigaciones Energéti cas Medioambientales y Tecno)
      • 116
        Exotica searches at CMS

        In this talk, we will present a selection of searches for new physics with the CMS detector, with a special emphasis on the most recent results obtained from the analysis of the full LHC Run 2 dataset and on new analysis techniques.

        Speaker: Laurent Thomas (Universite Libre de Bruxelles (BE))
      • 117
        Higgs (CMS)

        Recent results on Higgs boson physics by the CMS collaboration will be presented. Emphasis will be put on measurements and searches exploiting the full statistical power of the dataset collected during run2 of the LHC. The 137 fb^-1 of integrated luminosity gathered provide access to previously unreachable levels of precision, both in the measurement of the physical properties of the Higgs boson as well as in the ability to constrain theories that extend the Higgs sector beyond the Standard Model of particle physics.

        Speaker: Roberto Seidita (Universita e INFN, Firenze (IT))
      • 118
        Measurement of Higgs boson properties using the ATLAS detector

        With the pp collision dataset collected at 13 TeV, detailed measurements of Higgs boson properties can be performed. This talk presents measurements of Higgs boson properties using various decay modes of the Higgs boson. The different production mode cross sections are determined, simplified template cross sections are measured, and interpretations of the results in different frameworks are obtained.

        Speaker: Alyssa Rae Montalbano (Simon Fraser University (CA))
    • Public talk
      • 119
        Public talk: All you need is uncertainty

        All you need is uncertainty

        Speaker: Eliahu Cohen (Bar-Ilan University)
      • 120
        Interdisciplinary public talk: Climate Crisis of the Planet and Good Environmental Practices for a Sustainable Future

        Climate Crisis of the Planet and Good Environmental Practices for a Sustainable Future

        Speaker: Antonis Kalogerakis
    • Plenary Room 1

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      • 121
        Searches for New Long-lived Particles with the ATLAS detector

        Various models of physics Beyond the Standard Model lead to signatures with long-lived particles, such that the decay of the new particle is at a significant distance from the collision point. These striking signatures provide interesting technical challenges due to their special reconstruction requirements as well as their unusual backgrounds. This talk will present recent results in searches for new, long-lived particles using ATLAS Run 2 data.

        Speaker: Hideyuki Oide (Tokyo Institute of Technology (JP))
      • 122
        Status of Advanced Virgo and upgrades before the next observing runs

        Gravitational waves (GW) are ripples in the spacetime fabric, emitted by compact accelerating objects. On September 2015, a century after Einstein predicted the existence of GW, the first direct detection of GW from a binary black hole merger has been observed, thus opening a new window of observation on the Universe and marking the birth of GW Astronomy. This important result has been possible thanks to many years of R&D efforts done by the LIGO-Virgo collaborations for the upgrade to the second generation of ground-based GW detectors. In the following years, during the O1, O2 and O3 scientific runs, many other GW events have been detected by both LIGO and Virgo. During August 2017, when also Virgo joined the second observing run of LIGO, Advanced LIGO and Advanced Virgo detectors jointly detected GW resulting from the merger of two neutron stars. This was the first event ever detected both in the gravitational and electromagnetic windows. The network of three detectors allowed to better localise the source of the GW in the sky, and it has been possible to observe the electromagnetic counterpart with roughly 70 telescopes. The last observing run O3 started on April 1, 2019 and ended in March 2020. After the conclusion of the O3 run, a period of upgrade of the instrument is undergoing before the next run foreseen to start in January 2021. Signal-recycling mirror will be installed, and frequency dependent squeezing will be also implemented for a broadband reduction of the quantum noise. After an introduction on gravitational-wave detection, I will give an overview on the Advanced Virgo design and status. Finally, I will talk about the planned instrument upgrades towards the Advanced Virgo+ design, which will push the detector sensitivity towards the maximum achievable limit.

        Speaker: Sibilla Di Pace (INFN - National Institute for Nuclear Physics)
      • 123
        Probing dense QCD matter in the laboratory – The CBM experiment at FAIR

        The “Facility for Antiproton and Ion Research” (FAIR) in Darmstadt will provide unique research opportunities for the investigation of fundamental open questions related to nuclear physics and astrophysics, including the exploration of QCD matter under extreme conditions, which governs the structure and dynamics of cosmic objects and phenomena like neutron stars, supernova explosions, and neutron star mergers. The physics program of the Compressed Baryonic Matter (CBM) experiment is devoted to the production and investigation of dense nuclear matter, with a focus on the high-density equation-of-state (EOS), and signatures for new phases of dense QCD matter. According to the present schedule, the CBM experiment will receive the first beams from the FAIR accelerators in 2025. The CBM detector system, promising observables, and results of physics performance studies will be reviewed.

        Speaker: Peter Senger (GSI)
    • 10:30 AM
      Coffee Break
    • Semiplenary: High Energy Particle Physics Room 1

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      • 124
        Search for heavy resonances decaying into a pair of Z bosons using 139 fb−1 of proton–proton collisions at √s = 13 TeV with the ATLAS detector

        A search for heavy resonances decaying into a pair of Z bosons is presented. The search uses proton–proton collision data at a centre-of mass energy of 13 TeV collected from 2015 to 2018 that corresponds to an integrated luminosity of 139 fb$^{-1}$ which is the full data statistics collected by the ATLAS detector during the Run 2 of the Large Hadron Collider (LHC). Different mass ranges for the hypothetical resonances are considered spanning from 200 GeV to 2000 GeV. In the absence of a significant observed excess, the results are interpreted as upper limits on the production cross section of a spin-0 or spin-2 resonance. The upper limits for the spin-0 resonance are translated to exclusion contours in the context of Type-I and Type-II twoHiggs-doublet models (2HDM), while those for the spin-2 resonance are used to constrain the Randall–Sundrum (RS) model with an extra dimension giving rise to spin-2 graviton excitations.

        Speaker: Theodota Lagouri (Instituto De Alta Investigacion Universidad de Tarapaca (CL))
      • 125
        Using associated production of top quarks to neutral bosons to probe standard model couplings

        The unprecedentedly large integrated luminosity accumulated by the ATLAS detector at the highest proton-proton collision energy provided by the LHC allows for studies of rare top-quark SM processes. The associated production of top quarks with neutral bosons is such an example: it directly probes top-quark couplings to photons and Z bosons and tests for deviations from the standard model.

        Two measurements are presented.

        The cross sections for the production of top-quark pairs in association with a photon (ttgamma) or with a Z boson (ttZ) are measured both inclusively and differentially as a function of kinematic variables characterizing the tt+boson system. Both sets of measurements use the full Run-2 data set, corresponding to 139/fb of integrated luminosity. Final states with three and four leptons and b-jets are used to extract ttZ rates, while tt+gamma cross sections are derived from final states with one photon, one electron and one muon of opposite sign and at least two jets. The measurements are compared to predictions obtained by NLO+PS Monte Carlo and fixed-order NLO calculations.

        Speaker: Michal Dubovsky (Comenius University (SK))
      • 126
        Recent top quark measurements with the CMS experiment

        Latest results on top quark pair and single top quark production cross sections (inclusive and differential) are presented using proton-proton collision data collected by CMS. The results are confronted with precise theory calculations and used to constrain Standard Model parameters. For the first time, the third row of CKM matrix is measured from single top quark events and multidifferential $\mathrm{t}\bar{\mathrm{t}}$ cross sections are used to constrain simultaneously the top quark pole mass, $\alpha_S$, and PDFs. Moreover, recent results on top quark properties, such as spin correlations, mass measurements or constraints on top Yukawa from differential cross sections are also presented.

        Speaker: Agostino De Iorio (Universita e sezione INFN di Napoli (IT))
      • 127
        Search for heavy neutral lepton production at the NA62 experiment

        Searches for heavy neutral lepton production in K+ --> e+N and K+ --> mu+N decays using the data set collected by the NA62 experiment at CERN in 2016-18 are presented. Upper limits on the elements of the extended neutrino mixing matrix $|U_{e4}|^2$ and $|U_{\mu4}|^2$ are established at the levels of $10^{-9}$ and $10^{-8}$, respectively, improving on the earlier searches for heavy neutral lepton production and decays in the kinematically accessible mass range.

        Speaker: Mauro Piccini (INFN - Sezione di Perugia (IT))
    • Workshop on New physics paradigms after Higgs and gravitational wave discoveries Room 3

      Room 3

      • 128
        Instant folded strings, black holes and cosmology

        Recently it was realized that in certain situations folded strings are created at an instant. Since they violate the average null energy condition they lead to fascinating effects in Cosmology and black holes.

        Speaker: Prof. Nissan Itzhaki (Tel-Aviv University)
      • 129
        Does String Theory have stable de Sitter vacua ?

        String Theory is believed to have more than $10^{500}$ possible compactifications to four dimensions, leading to de Sitter universes whose physics resembles that of our universe. This is often invoked as supporting the ``anthropic principle'': our universe is but one of this multitude of universes (multiverse), and the physical parameters we observe in our universe are selected by requiring life to exist. This anthropic reasoning is becoming a more and more popular explanation to the extremely difficult task of explaining the enormous amount of fine-tuning of the cosmological constant and of the electroweak scale.

        The $10^{500}$ de Sitter vacua are constructed in low-energy effective theories that contain ingredients drawn from String Theory, and I will present three String-Theory calculations that show that these ingredients are incompatible. These calculations appear to rule out the KKLT construction of stable de Sitter vacua in String Theory, as well as other similar constructions. They supports the recent swampland conjectures that stable de Sitter vacua in controllable regimes of parameters do not exist in String Theory.

        Speaker: Iosif Bena (CEA-Saclay)
      • 130
        Gravitational Imprints from Heavy Kaluza-Klein Resonances

        We study the holographic phase transition of the radion field in a five-dimensional warped model which includes a scalar potential with a power-like behavior. We consider Kaluza-Klein (KK) resonances with masses $m_{\rm KK}$ at the TeV scale or beyond. The backreaction of the radion field on the gravitational metric is taken into account by using the superpotential formalism. The confinement/deconfinement first order phase transition leads to a gravitational wave stochastic background. Its power spectrum peaks at a frequency that depends on the amount of tuning required in the electroweak sector. We find that the present and forthcoming gravitational wave observatories can probe scenarios where the KK resonances are very heavy. Current aLIGO data already rule out vector boson KK resonances with masses in the interval $m_{\rm KK}\sim(1 - 10) \times 10^5$ TeV. Future gravitational experiments will be sensitive to resonances with masses $m_{\rm KK} ~ 10^5$ TeV (LISA), $10^8$ TeV (aLIGO Design) and $10^9$ TeV (ET). Finally, we also find that the Big Bang Nucleosynthesis bound in the frequency spectrum turns into a lower bound for the nucleation temperature as $T_n > 10^{-4}\sqrt{N} \,m_{\rm KK}$. This work is based on Ref.[1]. Other related references are [2-4].

        [1] E. Megias, G. Nardini, M. Quiros, 2005.XXXX [hep-ph].
        [2] L. Randall and G. Servant, JHEP 05, 054 (2007), arXiv:hep-ph/0607158 [hep-ph].
        [3] T. Konstandin, G. Nardini, and M. Quiros, Phys. Rev. D82, 083513 (2010), arXiv:1007.1468 [hep-ph].
        [4] E. Megias, G. Nardini, and M. Quiros, JHEP 09, 095 (2018), arXiv:1806.04877 [hep-ph].

        Speaker: Dr Eugenio Megias (University of Granada)
      • 131
        Four-dimensional noncommutative gravity

        We present our recent work that is the description of a gravitational theory as a gague theory on a covariant noncommutative space. First, we remind the most basics of the translation of gravity theories to the gauge theory language and also the tools we use to construct gauge theories on noncommutative spaces. Then, we describe the construction of the covariant noncommutative space, that is a fuzzy version of the four-dimensional de Sitter space. In turn, we move on with the construction of a four-dimensional gravity model in a gauge-theoretic way, with the group to be gauged to be identified as a subgroup of the isometry group of the above space. Last, we present our results and comment on the commutative limit.

        Speaker: George Manolakos (NTUA)
      • 132
        Exploiting weak field gravity-Maxwell symmetry in superconductive fluctuations regime

        It is since 1966, with the paper of DeWitt, that there is great interest in the interplay between the theory of gravitation and superconductivity. In the following years, a lot of theoretical papers about this topic have been produced, until Podkletnov and Nieminem declared to have observed a gravitational shielding in a disk of YBaCuO. Of course, after the publication of this paper, other groups tried to repeat the experiment obtaining controversial results so that the question is still open. Many researchers tried to give a theoretical explanation of the phenomenon, but the complexity of the formalism makes it difficult to extract quantitative predictions.
        Our study provides quantitative calculations in a range of temperatures very close to the critical temperature, in the regime of fluctuations. In particular, we study the behavior of a superconductor in a weak static gravitational field for temperatures slightly greater than its transition temperature (fluctuation regime). Making use of the time-dependent Ginzburg–Landau equations, we find a possible short time alteration of the static gravitational field in the vicinity of the superconductor, providing also a qualitative behavior in the weak field condition. Finally, we compare the behavior of various superconducting materials, investigating which parameters could enhance the gravitational field alteration.

        The variation of gravitational field as a function of distance in the vicinity of a superconductive sample of YBCO (grey solid line) and one of BSCCO (light blue dot-dashed line). The field is measured along the axis of the disk, with bases parallel to the ground, at the fixed time that maximizes the variation

        Speaker: Antonio Gallerati (Politecnico di Torino)
      • 133
        Stability of open-string models with broken supersymmetry

        We analyze the stability at one-loop of open string models in four-dimensional Minkowski space, where N=2 supersymmetry is spontaneously broken. In the region of moduli space where the supersymmetry breaking scale is lower than all other scales, we identify vanishing minima of the one-loop effective potential, up to exponentially small corrections. In these backgrounds, the spectrum satisfies Bose-Fermi degeneracy at the massless level.

        Speaker: Herve Partouche (Centre National de la Recherche Scientifique (FR))
    • Workshop on Physics at FAIR-NICA-SPS-BES/RHIC Room 2

      Room 2

      • 134
        Recent strangeness results from the RHIC beam energy scan

        The main motivation of the RHIC beam energy scan (BES) program is to study the quantum chromodynamics (QCD) phase diagram. Systematic analysis of Au+Au collisions from √sNN = 39 GeV down to 7.7 GeV in the RHIC BES-I could help to achieve the following goals: 1) to find the QCD critical point where the first order phase transition at finite baryon chemical potential ends and to identify the phase boundary of the first order phase transition; 2) to locate the collision energy where deconfinement begins.
        Strange hadrons are an excellent probe for identifying the phase boundary and onset of deconfinement. In particular, the strange quark production rate and its subsequent evolution in the hot and dense nuclear medium depend on the collision energy and the net baryon density. We will review recent STAR measurements of KS, K±, 𝜙, Λ, Ξ, and Ω at mid-rapidity from the RHIC BES-I. We will discuss the strangeness enhancement through the ratios K/𝜋, Λ/𝜋, 𝜙/𝜋 and Ξ/𝜋, and strangeness equilibration as a function of collision energy. Nuclear modification factors and baryon to meson ratios will be discussed to understand the hadron production mechanisms. Implications on partonic vs. hadronic dynamics at the RHIC BES-I energy range will be discussed. The prospects for the RHIC BES-II, starting from last year, will also be discussed.

        Speaker: Xianglei Zhu (Tsinghua University (CN))
      • 135
        Modeling (anti-)deuteron formation at RHIC with a geometric coalescence model

        We study (anti-)deuteron formation rates in heavy-ion collisions in the framework of a coalescence model. Our main assumption hereby is that nucleons are emitted from a spherically symmetric fireball volume, antinucleons from a spherical shell to account for nucleon-antinucleon annihilations at lower beam energies. Comparison with experimental data on the coalescence parameter in the range $\sqrt{s_{NN}}=4.7-200$ GeV allows us to extract radii of the respective source geometries. Our results are qualitatively supported by data from the UrQMD transport model which shows a comparable trend in the geometric radii as a function of beam energy. We find that at low energies the central region of the fireball suffers from the annihilation effects more than at higher energies

        Speaker: Apiwit Kittiratpattana (Suranaree University of Technology)
      • 136
        Azimuthal anisotropy measurements of strange and multi-strange hadrons in U+U collisions at $\sqrt{s_{NN}}$ = 193 GeV at RHIC

        Quantum Chromodynamics (QCD) predicts that at sufficiently high-temperature (T) and/or baryon chemical potential ($\mu_{B}$), normal nuclear matter converts into a de-confined state of quarks and gluons, known as Quark-Gluon Plasma (QGP). A hot and dense medium of quarks and gluons is created in relativistic heavy-ion collisions. The dynamics and collective behavior of such strongly interacting medium have been extensively studied at RHIC by measuring azimuthal anisotropy of the produced particles defined by the Fourier coefficients relative to the reaction plane. The mass ordering of elliptic flow (2nd-order flow harmonics) in the low $p_{T}$ region ($\leq$ 1.5 GeV/c) among various hadron species has been observed, which reflects the hydrodynamic evolution of the medium. Number-of-constituent-quark (NCQ) scaling at intermediate $p_{T}$ suggests the collective motion of quarks before hadronization. The higher-order flow harmonics reveal that the event-by-event fluctuation of the created QGP fireball transforms into final-state correlations of the produced hadrons. These higher-order flow harmonics provide information on the initial state fluctuations to constrain the initial conditions and precisely extract transport properties of the medium. Strange hadrons, especially multi-strange hadrons would be less affected by hadronic re-scattering in later stage of collisions, due to less hadronic interaction cross-section, and therefore be cleaner probe to study the collective motion in the partonic phase of the medium.

        In this work, we report systematic measurements of azimuthal anisotropy for strange and multi-strange hadrons ($K_{s}^{0},\phi,\Lambda,\Xi$ and $\Omega$) at mid-rapidity ($|y| <$ 1.0) in collisions of deformed shape U+U nuclei at $\sqrt{s_{NN}} =$ 193 GeV. These measurements are compared with the published results from Au+Au collisions at $\sqrt{s_{NN}} =$ 200 GeV. We will present the centrality and $p_{T}$ dependence of the flow coefficients ($v_{2}$, $v_{3}$ and $v_{4}$). The NCQ scaling of the flow coefficients in U+U collisions will be discussed. We will also discuss the ratio of $v_{n}$ scaled by the participant eccentricity ($\varepsilon_{n}\left\lbrace 2 \right\rbrace$) to explore system size dependence and collectivity in U+U collisions. The results will be compared to hydrodynamics and transport model calculations.

        Speaker: Dr Vipul Bairathi (Instituto de Alta Investigación, Universidad de Tarapacá)
      • 137
        Elliptic and triangular collective flow of identified charged hadrons in Au+Au at $\sqrt{s_{NN}}$ = 200 GeV

        A central goal of current experiments at RHIC and LHC is to study the properties of the hot and dense QCD matter produced in energetic heavy-ion collisions. Such studies can give insight into the QCD phase diagram, as well as the transport coefficients of the strongly-coupled Quark-Gluon Plasma (sQGP). Anisotropic flow measurements of identified particles play an essential role in such studies. We report on the measurements of elliptic ($v_2$) and triangular ($v_3$) flow of identified charged hadrons in Au+Au collisions at 200 GeV per nucleon pair center of mass energy measured with the STAR detector at RHIC. The results will be presented as a function of transverse momentum ($p_T$) and collision centrality for different particle species and compared with recent ALICE measurements in Pb+Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV.

        Speaker: Mr Peter Parfenov (NRNU MEPhI)
      • 138
        Production of light flavor hadrons in small systems measured by PHENIX at RHIC

        With the recent observations of collective behavior of produced particles in small system collisions, measurements of the modification of hadron production in small systems have become increasingly relevant. To study properties of possible quark-gluon plasma and CNM effects PHENIX has performed measurements of light flavor hadrons ($π$ , $η$ and other hadrons with masses up to ~1GeV) in a broad set of projectile-target combinations including $p$+Al, $p$+Au, $d$+Au and $^3$He+Au collisions at $\sqrt{s_{_{NN}}} = 200$ GeV. The obtained invariant transverse momentum spectra and nuclear modification factors will be presented and compared to theoretical model predictions where available.

        Speaker: Mariia Larionova
    • 1:30 PM
    • 4:00 PM
      Coffee Break
    • Semiplenary: High Energy Particle Physics Room 1

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      • 139
        The ENUBET experiment

        The ENUBET experiment (*) aims at demonstrating the feasibility of a "monitored" neutrino beam, in which the absolute normalization of the neutrino flux produced by a narrow band meson beam can be constrained at the 1% level. The electron neutrino component is determined by monitoring large-angle positrons from K$_{e3}$ decays in a 40 m long instrumented decay tunnel (tagger). The measurement of muons in the tagger and after the hadron dump allows to determine the $\nu_\mu$ flux from kaons and pions respectively. In addition, in a narrow band beam (p=8.5GeV $\pm$ 10%), the transverse position of the neutrino interaction at the detector can be exploited to determine a priori, with significant precision, the neutrino energy spectrum without relying on the final state reconstruction. These concepts can be implemented in a single facility based on standard accelerator technologies for a new generation of high precision $\nu_e$ and $\nu_\mu$ cross section measurements at the GeV scale and for precision searches of Physics beyond the standard three neutrino paradigm.

        We will present the optimization and performances of a 20 m long focusing transfer line allowing for a continuous measurement of K$_{e3}$ positrons at single-particle level. The (quadrupole-based) focusing system is designed to be operated with a slow extraction proton scheme where protons can be diluted over several seconds. This timing allows for the direct monitoring of muons after the hadron dump and extends the original scope of the project towards a full-fledged "time-tagged" neutrino beam: time-coincidences among the lepton at the source and the neutrino at the detector would enable an unprecedented purity and the possibility to reconstruct the neutrino kinematics at source on an event by event basis.

        At ICNFP we will present the design of the horn-based beamline. We have recently improved the initial transfer line design by introducing an additional dipole giving an increased bending angle for momentum selection ($\sim$8.5 GeV/c mesons). It ensures a reduced background from the untagged neutrino component at the neutrino detector and an higher purity of the meson beam at the expense of a reduced meson yield. The neutrino flux reduction is compensated in this option by a horn-based focusing and a "burst slow extraction" that has been recently demonstrated experimentally at CERN-SPS in the context of the ENUBET machine studies.

        This contribution will report on another major milestone: the final design of the ENUBET demonstrator for the instrumented decay tunnel that is due end 2021, and has been selected on the basis of the results of the 2016-2018 testbeams. This large detector prototype will prove the scalability and performance of the selected detector technology: an iron-scintillator modular sampling calorimeter (for e/$\pi$ separation) with a lateral light readout through WLS fibers connected to SiPMs, complemented by a photon veto system (for e/$\pi^0$ separation) made by an inner ring of plastic scintillator trackers.

        (*) ENUBET is an ERC project (2016-2021, p.i. Andrea Longhin). Since March 2019 ENUBET is also a CERN Neutrino Platform experiment, approved under the name NP06/ENUBET.

        Speaker: Claudia Caterina Delogu (University & INFN, Padova (IT))
      • 140
        Scaling properties of jet quenching in expanding media

        We present a study of the impact of the expansion of deconfined medium on single-gluon emission spectra and the jet suppression factor ($Q_{AA}$) within the BDMPS-Z formalism. These quantities are calculated for three types of media (static medium, exponentially decaying medium and Bjorken
        expanding medium). The distribution of medium-induced gluons and the jet $Q_{AA}$ are calculated using the evaluation of in-medium evolution with splitting kernels derived from the gluon emission spectra. Scaling behavior of splitting kernels is derived for low-x and high-x regimes in the asymptote of large times and its impact on the resulting jet $Q_{AA}$ is discussed. For the full phase space of the radiation, the scaling of jet $Q_{AA}$ with an effective quenching parameter is presented.

        Speaker: Mr Souvik Priyam Adhya (Institute of Particle and Nuclear Physics Faculty of Mathematics and Physics, Charles University)
      • 141
        Multiplicity dependence of quarkonia and open heavy flavour mesons

        In this talk we present our theoretical results for the multiplicity dependence of open heavy flavour mesons ($D$- and $B$-mesons) and prompt quarkonia production in $pp$ collisions. For the quarkonia production we found that rapidly growing multiplicity dependence could be interpreted as a strong evidence in favor of multigluon fusion contributions in production of the quarkonia states, and demonstrate that the 3-gluon fusion can describe the recent data on multiplicity from STAR and ALICE collaborations. We also demonstrate that 2-gluon fusion approaches predict milder dependence on multiplicity, at tension with data. We also analyze the role of the 3-gluon contributions for the case of open heavy meson production and find that they are pronounced, especially for $D$-mesons at small transverse momenta $p_T$. Their inclusion improves agreement with experimental data. However, the corrections have midler effect on observed multiplicity dependence (compared to that of quarkonia) due to partial compensation of multiplicity dependence of certain process-specific interference contributions. These findings are in agreement with data from ALICE.

        This presentation is partially based on our recent publications Phys.Rev.D 101 (2020) 9, 094020 and Eur.Phys.J.C 80 (2020) 6, 560.

        Speaker: Marat Siddikov (Universidad Santa Maria)
      • 142
        Searches for new phenomena in final states with 3rd generation quarks using the ATLAS detector

        Many theories beyond the Standard Model predict new phenomena, such as Z’ and vector-like quarks, in final states containing bottom or top quarks. Such final states offer great potential to reduce the Standard Model background, although with significant challenges in reconstructing and identifying the decay products and modelling the remaining background. The recent 13 TeV pp results, along with the associated improvements in identification techniques, will be reported

        Speaker: Elham E Khoda (University of British Columbia (CA))
      • 143
        Searches for new phenomena in final states involving leptons and jets using the ATLAS detector

        Many beyond the Standard Model signatures predict new particles that decay into final state containing both leptons and jets. This talk will present new search results for massive particles by the ATLAS experiment using the full Run 2 dataset. A particular focus is given to searches for leptoquarks (LQ), that offer an attractive potential explanation for the lepton flavour anomalies seen at flavour factories, and heavy neutrinos, such as the Type I or Type III seesaw mechanisms which can explain the light neutrino masses.

        Speaker: Vincent Wai Sum Wong (University of British Columbia (CA))
      • 144
        The Muon g-2 Experiment at Fermilab

        The main goal of the Muon g-2 Experiment at Fermilab is to measure the anomalous magnetic moment of the muon with a fourfold improvement in precision as compared to the previous measurement at BNL. The measurement is motivated by the greater than 3 standard deviation difference between the Standard Model prediction and the BNL measurement, which hints at the possibility of new physics. The anomalous magnetic moment is measured by precisely determining the frequency of the muon spin precession relative to the muon momentum and the average magnetic field experienced by the muons in the storage ring. Detailed simulations of the muon storage ring are used to study systematic effects that arise from the beam and spin dynamics, which are important for the determination of systematic uncertainties. This talk presents the status of the experiment and Run-1 data analysis. The Run-1 data was collected during 2018, and it has a statistical uncertainty that is comparable to the BNL measurement.

        Speaker: Anna Driutti (University of Kentucky)
    • Workshop on Higgs Physics Room 3

      Room 3

      • 145
        Search for CP violation in Higgs boson interactions at the ATLAS experiment

        While the Standard Model predicts that the Higgs boson is a CP-even scalar, CP-odd contributions to the Higgs boson interactions to vector bosons and fermions are still not strongly constrained. A variety of Higgs boson production processes and decays can be used to study the CP nature of the Higgs boson interactions. This talk presents the most recent results of such analyses based on pp collision data collected at 13 TeV.

        Speaker: Antonio De Maria (Nanjing University (CN))
    • Workshop on Physics at FAIR-NICA-SPS-BES/RHIC Room 2

      Room 2

      • 146
        Production and reconstruction of short-lived resonances in heavy-ion collisions at NICA energies using the MPD detector

        The short-lived resonances have been very useful in the study of heavy-ion collisions at SPS, RHIC, and the LHC. Properties of these particles measured in hadronic decay channels carry a wealth of information about the hadron chemistry and reaction dynamics. Resonances containing one or two strange quarks contribute to the study of the strangeness enhancement phenomenon, their integrated and differential yields are sensitive to the hadron re-scattering and regeneration in the hadronic phase. The resonance production has never been studied in detail in heavy-ion collisions at NICA energies. We review the expected properties of the resonances and their sensitivity to different stages of Au+Au collisions at different energies, $\sqrt{s_{NN}}$ = 4-11 GeV. Results of feasibility studies for reconstruction of $\rho^{0}$(770), K*(892), $\phi$(1020), $\Sigma$(1385)$^{\pm}$, $\Lambda$(1520) and $\Xi$(1530)$^{0}$ resonances in the MPD experimental setup as a function of collision energy and centrality are presented.

        Speaker: Viktor Riabov (NRC Kurchatov Institute PNPI (RU))
      • 147
        Anisotropic Flow measurements with MPD detector at NICA

        The main goal of study the relativistic heavy-ion collisions at energies of accelerator facility NICA ( 4−11 GeV) is to explore the QCD phase diagram in the region of high net baryon chemical potential and moderate temperatures. The anisotropic collective flow is one of the important observables sensitive to transport properties of strongly interacting matter created in such collisions. The MPD performance for anisotropic flow measurements is studied with Monte-Carlo simulations using collisions of Au+Au and Bi+Bi ions employing several state of the art event generators. Different methods for flow measurements: event plane, scalar product and direct cumulants are used to investigate the contribution of non-flow correlations and flow fluctuations.

        Speaker: Dr Arkadiy Taranenko (NRNU MEPHI)
      • 148
        Measurement of bb_bar production at forward rapidity in p+p collisions at \sqrt{s} = 510 GeV

        Heavy flavor quarks are an important probe of the initial state of the Quark Gluon Plasma formed in heavy-ion collisions. Bottom and charm quarks are produced early in the collision, primarily through hard interactions, and experience the full evolution of the medium. Understanding bottom quark production in $p$+$p$ collisions gives a baseline reference for studying larger collision systems. The measurement of the $b\bar{b}$ cross section gives insight into $b$ quark production mechanisms which can directly test pQCD predictions. Utilizing the unique properties of neutral $B$ meson oscillation, the $b\bar{b}$ signal is extracted from like-sign dimuons with invariant mass of 5--10 GeV/$c^2$ at forward rapidity. Measuring like-sign dimuons within this mass range provides an enriched bottom signal with minimal amount of open charm background and without any contributions from quarkonia or Drell-Yan pairs. In this talk, we report the $b\bar{b}$ differential cross section and extrapolated total cross section. The azimuthal opening angle between muon pairs from $b\bar{b}$ decays and their $p_T$ distributions will also be presented. The total cross section at $\sqrt{s}$ = 510 GeV is compared to world data at different energies and to a perturbative quantum chromodynamics calculation.

        Speaker: Murad Sarsour (Georgia State University)
    • Workshop on New physics paradigms after Higgs and gravitational wave discoveries Room 3

      Room 3

      • 149
        Gravitational Waves from Fundamental Axion Dynamics

        In this talk I will present a fundamental theory of the QCD axion: all couplings flow to zero in the infinite energy limit (realizing the totally asymptotically free scenario) and the Peccei-Quinn (PQ) scale $f_a$ is dynamically generated by quantum effects. This theory is highly predictive as the axion sector only features few free parameters: $f_a$ and the QCD gauge coupling. The PQ phase transition is strongly first order and I will discuss how to test this theory through gravitational wave detectors such as LIGO and the Einstein telescope.

        Speaker: Dr Alberto Salvio (University of Rome and INFN Tor Vergata)
      • 150
        New Results in Models with Reduced Couplings

        The renormalization group invariant, to all orders in perturbation theory, relations among parameters consist the basis of the reduction of couplings concept. N=1 supersymmetric Grand Unified Theories can use the above concept, and even become finite at all loops. In our work we analyse four phenomenologically favoured models: a minimal version of the N=1 SU(5), a finite N=1 SU(5), a N=1 finite SU(3)xSU(3)xSU(3) model and a reduced version of the MSSM. A relevant update in the phenomenological evaluation has been the improved light Higgs-boson mass prediction as provided by the latest version of FeynHiggs. All four models predict relatively heavy supersymmetric spectra that start just below or above the TeV scale.

        Speaker: Gregory Patellis
      • 151
        If Dark Matter nonminimally couples to gravity...

        We need Dark Matter to explain lack of gravitational potentials in present and early Universe at various spatial scales. So it must participate in gravitational interactions. Gravity can even produce the Dark Matter while the Universe expands. What changes if the Dark Matter is a substence with non-minimal coupling to gravity? Actually, a variety of options ranging from 'gravity can destroy the dark matter', to 'it can hugely amplify its production'.

        Speaker: Dmitry Gorbunov (Russian Academy of Sciences (RU))
      • 152
        Prospects on primordial black holes as dark matter

        I will present an overview of primordial black holes as dark matter candidates, across a wide range of masses and detection methods.

        Speaker: Stefano Profumo (University of California, Santa Cruz)
    • Workshop on Heavy Ion Physics Room 2

      Room 2

      • 153
        Generic algorithm for multi-particle cumulants of azimuthal correlations in high energy nucleus collisions

        Anisotropic flow is used to study the key properties and the evolution of the quark-gluon plasma (QGP) created in heavy-ion collisions and to search for a small droplet of QGP in small collision systems. One of the ways of studying these phenomena is via multi-particle cumulants of different orders. Currently, only a few of them are available and have been studied in theoretical calculations and experimental measurements as the direct implementation of higher orders have not been feasible before.

        In this talk, we present a recursive algorithm to provide general formulas of multi-particle cumulants. It enables a construction of arbitrary order of single and mixed harmonic multi-particle cumulant which measures the general correlations between any moments of different flow coefficient. These variables that have been studied using a toy Monte Carlo, MC-Glauber, and HIJING transport model, can contribute to distinguishing between different initial state models and can help extracting more precisely the information of the dynamic evolution of the created hot and dense matter.

        Speaker: Zuzana Moravcova (University of Copenhagen (DK))
      • 154
        Induced Surface and Curvature Tensions approach for 3D and 2D multicomponent dense mixtures of hard spheres

        Induced Surface and Curvature Tensions approach for 3D and 2D multicomponent dense mixtures of hard spheres
        Results for classical case and thoughts about its generalization using Lorentz contraction of excluded volume

        Speaker: Nazar Yakovenko (Taras Shevchenko National University of Kyiv)
      • 155
        Overview of the PHENIX spin results

        The PHENIX experiment takes full advantage of polarized proton collisions provided by the Relativistic Heavy Ion Collider to probe the spin structure of the proton. The PHENIX Spin program studies the gluon and sea quark helicity distributions as well as transverse spin phenomena via various spin observables using longitudinally and transversely polarized proton collisions.
        In addition, recent data in transversely polarized proton and nucleus collisions extends these measurements and allows one to study nuclear effects in the asymmetry measurements.
        In this talk, recent highlight of the PHENIX spin program will be presented.

        Speaker: Sanghwa Park (Stony Brook University)
    • Concert per Internet, "Sacred Music"
    • Plenary Room 1

      Room 1

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      • 157
        LHCb: Heavy ion physics results and prospects

        In 2016, LHCb collected 12.5 and 17.4 inverse nanobarns in pPb and Pbp collisions, respectively. These new high statistics samples are essential to study the CNM effects and to disentangle them from those associated with QGP formation in PbPb collisions. The LHCb forward geometry provides coverage over two independent rapidity ranges in the centre-of-mass frame when the p and Pb beams are inverted: 1.5 to 4.0 for pPb collisions and −5.0 to −2.5 for Pbp collisions. In 2018, LHCb recorded ~210 inverse microbarns integrated luminosity of PbPb collisions at center-of-mass = 5.02 TeV. Although limited to peripheral hadronic collisions, this new dataset offers unique opportunities to study simultaneously open and close heavy flavor production, at forward rapidity and down to zero pT, at the LHC. The largely unknown parton distribution functions of nuclei and the similarities observed between high-multiplicity pp and pPb events compared to PbPb, often described by means of hydrodynamics, are the main motivations for an extended pPb data taking program during LHC Run 3 and Run 4. The future increase in luminosity combined with the LHCb unique and improved detector capabilities in the upgrade will allow to perform new and precise measurements. Moreover, an upgraded internal gas target is going to be installed for the LHCb run 3 fixed target program, allowing a wider choice of gas species and an increase of the gas density by up to two order of magnitude. In this talk, we present the latest results on heavy flavor productions obtained by the LHCb collaboration in heavy ions collisions as well as prospects on both the heavy ions collisions and fixed target programs.

        Speaker: Roman Litvinov (Universita e INFN, Cagliari (IT))
      • 158
        Shear viscosity of nucleons and pions in heavy-ion collisions at energies of NICA

        We continue our study of shear viscosity of nuclear matter in the central zone of central Au+Au collisions at NICA energies. Calculations are done within the UrQMD model both for dynamic case of A+A collisions and for the box with periodic boundary conditions to study the relaxation process and determine the damping rates. Statistical model of ideal hadron gas helps us to extract temperature and chemical potentials of the system. Shear viscosity is calculated according to the Green-Kubo formula. Partial viscosities of nucleons and pions are also studied.

        Speaker: Evgeny Zabrodin (University of Oslo (NO))
      • 159
        Dark Matter searches with Spectrum-Roentgen-Gamma (SRG) space observatory

        About a year ago launched SRG carries eROSITA and ART-XC X-ray telescopes
        on board and will contribute considerably to cosmology by investigating
        cosmic large scale structure properties associated with galaxy clusters. Four years of data taking will allow to observe all the galaxy clusters formed in
        the visible Universe. At the same time SRG can reveal the nature of Unknown Components of the present Universe by probing specific particle physics models of dark energy and dark matter. In particular, dark matter particles decaying (e.g. sterile neutrinos) or annihilating with keV-scale photons in the final state can be probed with eROSITA (energy range 0.2--10\,keV) and ART-XC (4--30\,keV)
        X-ray telescopes aboard, including tests of the controversal 3.5keV line.

        Speaker: Dmitry Gorbunov (Russian Academy of Sciences (RU))
      • 160
        Weak measurements and light-matter interactions

        Unlike projective measurements, weak measurements [1] enable to gather slight information about the measured system while avoiding in most cases its collapse. This unique property, enabled by the loose coupling between the measuring apparatus and the measured system, has opened up a plethora of conceptual and practical applications. After a brief introduction to this topic, partially based on our previous works [2,3,4], I will present a recent experimental work [5], where we realized for the first time variable-strength measurements in a trapped ion system. Our analysis shows that the weak-to-strong transition relies on a dimensionless coupling parameter related to the system-apparatus interaction. Further implications, as well as the related quantum-to-classical transition in free electron systems [6] will be discussed as well. These latest works create a connection between the quantum measurements formalism and the world of light-matter interactions, enabling to describe the latter in terms of the former.

        [1] Y. Aharonov, D.Z. Albert, L. Vaidman, How the result of a measurement of a component of the spin of a spin-1/2 particle can turn out to be 100, Phys. Rev. Lett. 60, 1351 (1988).
        [2] B. Tamir, E. Cohen, Introduction to weak measurements and weak values, Quanta 2, 7-17 (2013).
        [3]Y. Aharonov, E. Cohen, A.C. Elitzur, Foundations and applications of weak quantum measurements, Phys. Rev. A 89, 052105 (2014).
        [4] F. Piacentini et al., Measuring incompatible observables of a single photon, Phys. Rev. Lett. 117, 170402 (2016).
        [5] Y. Pan, J. Zhang, E. Cohen, C.-W. Wu, P.-X. Chen, N. Davidson, Observation of the weak-to-strong transition of quantum measurement in trapped ions, accepted to Nat. Phys., arXiv:1910.11684.
        [6] Y. Pan, E. Cohen, E. Karimi, A. Gover, I. Kaminer, Y. Aharonov, Weak measurement, projective measurement and quantum-to-classical transitions in electron-photon interactions, arXiv:1910.11685.

        Speaker: Dr Eliahu Cohen (Bar-Ilan University)
    • 10:30 AM
      Coffee Break
    • Plenary Room 1

      Room 1

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      • 161
        Searches for the hydrodynamic fluid in small collision systems at the LHC

        The primary goal of the ultra-relativistic heavy-ion collision program at the Large Hadron Collider (LHC) is to study the properties of the Quark-Gluon Plasma (QGP), a novel state of strongly interacting matter which exists in the early universe. Anisotropic flow, which quantifies the anisotropy of the momentum distribution of final state particles, is sensitive to the fluctuating initial conditions and the transport properties of the created QGP. The successful description of the measured anisotropic flow coefficients by hydrodynamic calculations suggests that the created medium behaves like a nearly perfect fluid. However, the observation of collective flow phenomena in high energy proton-lead and proton-proton collision triggers intense discussions. Whether the smallest droplet of QGP has been produced in these collisions or other physics mechanisms, including initial momentum anisotropy from Color Glass Condensate, will also be attributed to this phenomenon, is under debate.

        In this talk, I will present the latest developments of flow studies in small collision systems at the LHC, including results from proton-lead at $\sqrt{s_{_{\rm NN}}} =$ 5.02 TeV and proton-proton collisions at $\sqrt{s} =$ 13 TeV. I will focus on the current challenge of the hydrodynamic description on flow measurements with multi-particle cumulants. Furthermore, I will highlight the future opportunities for the coming LHC Run 3 program, which should eventually answer the fundamental questions if the hydrodynamic fluid has been produced in the small collision systems.

        Speaker: You Zhou (Niels Bohr Institute (DK))
      • 162
        On duality between quantum statistical and field-theoretic approaches

        Motivated by the phenomenology of the heavy-ion collisions, we consider various processes in rotating and accelerated chiral media in equilibrium. There are two dual approaches to address the issues: field theory on a curved background and statistical approach in flat space, with the density operator taking on the most general form. On a few examples, we demonstrate the duality in case of quantum particles of spins $s= 0,1/2,1$. In case of higher spins we encounter difficulties which seem to suggest breaking of the duality. Some phenomenological consequences are indicated.

        Speaker: Prof. G. Yu. Prokhorov (JINR)
      • 163
        Screening vs. confinement in 2-dimensional QCD with adjoint fermions

        We discuss the physics of 2-dimensional QCD with adjoint fermion content. Unexpectedly, in the case when the fermions are massless and the gauge group is SU(N) with even N, they can screen a heavy probe charge even if it belongs to the fundamental color representation. If N is odd, the situation is not so clear. In the old paper of Gross, Klebanov, Matitsyn and myself, we argued that the theory is screening also in this case. However, this conclusion was contested in the recent paper by Cherman, Jacobson, Tanizaki and Unsal. There are also some fresh developments in understanding this phenomenon, which I will discuss in my talk.

        Speaker: Andrei Smilga
      • 164
        Closing of the conference
    • Workshop on Laser fusion Room 2

      Room 2

      • 165
        Proton Boron Fusion revisited with respect to Laser Fusion and Accelerator Driven High Energy Density Science

        High Energy Density Physics (HEDP) with intense heavy ion beams is a complementary tool to
        induce extreme states of matter. The development of this field connects intimately to the advances in accelerator physics and technology. Thus the upcoming high intensity particle accelerators like FAIR at GSI Darmstadt, the proposed HIAF facility in China, and in some respects also NICA at Dubna are a new tools to induce High Energy Density states in matter. We will give an account of High Energy Density Physics with aspects of inertial fusion energy and due to recent developments we will address Proton-11Boron fusion.
        After a short introduction of Inertial Fusion and Inertial Fusion Energy we will discuss the development of High Energy Density Physics (HEDP) with intense heavy ion beams as a tool to induce extreme states of matter, starting from the ion source and follow the acceleration process and transport to the target. Intensity limitations and potential solutions to overcome these limitations are discussed. This is exemplified by discussing examples from existing machines at the Gesellschaft für Schwerionenforschung (GSI-Darmstadt), the Institute of Theoretical and Experimental Physics in Moscow (ITEP-Moscow), and the Institute of Modern Physics (IMP-Lanzhou). Facilities under construction like the FAIR facility in Darmstadt and the High Intensity Accelerator Facility (HIAF), proposed for China will be included. Developments elsewhere are covered where it seems appropriate along with a report of recent results and achievements

        Speaker: Dieter H.H. Hoffmann (Xi'An Jiaotong University)
      • 166
        Nanoplasmonic Laser Fusion

        Inertial Confinement Fusion is a promising option to provide massive, clean, and affordable energy for humanity in the future. The present status of research and development is hindered by hydrodynamic instabilities occurring at the intense compression of the target fuel by energetic laser beams. A recent proposal by Csernai et al.1 combines advances in two fields: detonations in relativistic fluid dynamics and radiative energy deposition by plasmonic nano-shells. The initial compression of the target pellet can be decreased, not to reach instabilities. A final and more energetic, short laser pulse can achieve rapid volume ignition, which should be as short as the penetration time of the light across the target. In the present study, we discuss a flat fuel target irradiated from both sides simultaneously, to acheve ignition on a time-like hypersurface like in high energy heavy ion reactions. Here we propose an ignition energy with smaller compression, by largely increased entropy increase, and instead of external indirect heating and huge energy loss, a maximized internal heating in the target with the help of recent advances in nano-technology. The reflectivity of the target can be made negligible, and the absorptivity can be increased by one or two orders of magnitude by plasmonic nano-shells embedded in the target fuel. Thus, higher ignition energy and radiation dominated dynamics can be achieved. Here most of the interior will reach the ignition energy simultaneously based on the results of relativistic fluid dynamics. This makes the development of any kind of instability impossible, which up to now prevented the complete ignition of the fuel.

        Speaker: Prof. Laszlo Pal Csernai (University of Bergen)
      • 167
        Nanoplasmonic Laser Fusion Target Fabrication - Considerations and Preliminary Results (NAPLIFE Project)

        The talk is related to a Hungarian collaboration, NAPLIFE: Nano-plasmonic Laser Inetial Fusion Experiment, and will focus on considerations and preliminary results regarding the target fabrication. The goal is the development of a bulk-nanocomposite, where the concentration of nanoparticles is controlled along the normal direction. The talk will address the following topics: 1) theoretical modelling of nanocomposites, the effect of nanoparticle shape, size and orientation on the absorbance of the target; 2) nanocomposite preparation; 3) target fabrication methods; 4) characterization of the prepared nanocomposite layers with ellipsometry and optical spectroscopy; 5) preliminary irradiation results, characterization with Raman spectroscopy.

        Speaker: Attila Bonyár
    • Excursion to Chania
      • 168
        Excursion to Chania

        15:00 - Departure from OAC with bus to Chania
        16:00 - Meet the guide in the Synagogue of Chania for visit of the old town and talk of Jewish history
        17:00 - Meet the guide at 17:00 in front of archeological Museum of Chania for visiting the Museum and visit of the Cathedral.
        18:15-19:00 - Free time
        19:00 - Meet in the synagogue of Chania for performance of Kalliopi Petrou and Tommaso Dorigo in the Synagogue of Chania followed by the evening service at the synagogue for interested people.
        21:00 - Meet in taverna for dinner together in Chania

    • Plenary: Workshop on Physics at FAIR-NICA-SPS-BES/RHIC Room 1

      Room 1

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      • 169
        Opening of extended session
      • 170
        The upgrade program of the BM@N experiment at NICA

        The Nuclotron at the Joint Institute for Nuclear Research in Dubna will deliver gold beams with kinetic energies between 2 and 3.8 A GeV. In heavy-ion collisions at these energies, it is expected that the nuclear fireball will be compressed up to about four times the saturation density, which offers the opportunity to study properties of nuclear matter at neutron star core densities. The Baryonic Matter at the Nuclotron (BM@N) experiment will be upgraded to perform multi-differential measurements of hadrons including (multi-) strange hyperons, which are expected to be sensitive to the high-density equation-of-state (EOS) of nuclear matter, and might reflect new phases of quantum chromodynamic (QCD) matter. Moreover, the measurement of light hypernuclei may shed light on the role of hyperons in neutron stars. The layout of the upgraded BM@N experiment and the results of feasibility studies will be presented.

        Speaker: Peter Senger (GSI)
      • 171
        Strangeness freeze-out in heavy-ion collisions at energies of BES/FAIR/NICA

        Production of strange hadrons is studied in heavy-ion collisions at energies of BES, FAIR and NICA within the microscopic transport models. The whole interaction area is subdivided into the smaller cells. We perform the analysis of the space-time evolution of all particles in all cells, in the T-mu_B and T-mu_S planes, and the analysis in x-t of the finally emitted strange and non-strange particles.
        Following the time evolution of the distributions, one sees earlier freeze-out of kaons and pions compared to, e.g., protons and Lambdas. The latter appear to be frozen out at lower temperature and larger strangeness chemical potential.

        Speaker: Larisa Bravina
      • 172
        Scaling relations for anisotropic flow based on the data from beam energy scan experiments

        Scaling relations for anisotropic flow based on the data from beam energy scan experiments

        Speaker: Dr Arkadiy Taranenko (NRNU MEPHI)
    • 4:05 PM
      Coffee Break
    • Mini-workshop on Machine Learning for Particle Physics Room 1

      Room 1

      • 173
        Cluster analysis of Very Long Period events at Stromboli Volcano recorded by the Italian National Institute of Geophysics and Volcanology INGV

        The Stromboli Volcano erupted on July 3, 2019 and August 28, 2019 after a period of modest activity. The paroxysm on July 3rd was not predicted by the monitored parameters that characterize the activity of the volcano. This motivates the study of alternative seismic parameters in the eruption period in order to identify parameters that have potential to predict paroxysms in the future using multivariate analysis techniques of wide-ranging interest for data analysis in physics. In this work we present a cluster analysis of Very Long Period signals of Stromboli volcano in the time period of the paroxysms. We show that the waveforms of the Very Long Period signals form two clusters that exhibit a strong variation in time and thus their ratio constitutes a potential parameter to characterize anomalous behavior of the volcano.

        Speaker: Lukas Layer (Universita e INFN, Padova (IT))
    • Parallel session: Cosmology, Astrophysics, Gravity, Mathematical Physics Room 2

      Room 2

      • 174
        The ADAMO Project for the Dark Matter Directionality Approach

        Anisotropic scintillators offer a unique possibility to exploit the so-called directionality approach to investigate the presence of Dark Matter (DM) candidates that induce nuclear recoils. In fact, their use can overcome the difficulties in detecting traces of extremely short nuclear recoils. In this talk, recent measurements on the anisotropic response of a ZnWO$_4$ crystal scintillator to $\alpha $ particles and to nuclear recoils will be presented, within the ADAMO project. Such anisotropic futures were initially measured with $\alpha$ particles also confirmed by the additional measurements given here. The experimental data on nuclear recoils were obtained using a neutron generator at ENEA-CASACCIA and a dedicated experimental set-up. In particular, the ``quenching '' factors for the nuclear recoils along the different crystallographic axes were determined for three neutron diffusion angles (i.e. three different values ​​of nuclear recoil energies). From these measurements, the degree of anisotropy was determined at 5.4 $\sigma$ standard deviations. An example of reachable sensitivity in a given scenario within the ADAMO project will also be discussed.

        Speaker: Dr Vincenzo Caracciolo (University of Rome Tor Vergata)
      • 175
        Superluminality in beyond Horndeski theory with extra matter

        We address the issue of potential superluminal propagation of gravitational waves in back- grounds neighboring the previously suggested bounce [arXiv:1807.08361 [hep-th]] in beyond Horndeski theory. We find that the bouncing solution lies right at the boundary of the region where the gravitational waves propagate at speed exceeding that of light, i.e. that solution suffers superluminality problem. We suggest a novel version of a completely stable bouncing model where both scalar and tensor perturbations remain safely subluminal not only on the solution itself but also in its neighbourhood. The model remains free of superluminality when extra matter in the form of radiation or, more generally, ideal fluid with equation of state parameter w ≤ 1/3 (and also somewhat higher) is added. Superluminality reappears when extra matter is added whose sound velocity is equal or close to 1 in flat space; an example is scalar field minimally coupled to metric. The latter property is characteristic of all beyond Horndeski cosmologies; we briefly discuss its significance.

        Speaker: Victoria Volkova (MSU)
    • Parallel session: High Energy Particle Physics Room 1

      Room 1

      • 176
        Double beta decay of $^{150}$Nd on excited levels of $^{150}$Sm

        The $^{150}$Nd nuclide is one of the most promising to search for double beta decay among 35 naturally occurring double beta isotopes due to the high energy release 3371.38(20) keV and comparatively high isotopic abundance 5.638(28) %. The $2\beta$ transition to the 740.5-keV $0_1^+$ excited level of $^{150}$Sm was observed in few experiments with the half-lives in a wide range $(7 – 14)\times10^{19}$ y.
        An experiment to search for $2\beta$ decay in $^{150}$Nd to excited levels of $^{150}$Sm with a highly purified 2.381-kg Nd$_2$O$_3$ sample is in progress in the low-background set-up GeMulti with 4 HPGe detectors ($\approx$225 cm$^3$ volume each) deep underground (3600 m w.e.) at the STELLA facility of the Gran Sasso National Laboratory of the INFN (Italy).
        Two gamma-quanta with energies 334.0 keV and 406.5 keV emitted after deexcitation of the $0_1^+$ excited level of $^{150}$Sm have been observed in the experimental spectra accumulated over 34174 h giving the preliminary half-life value of $^{150}$Nd: $T_{1/2}= [8.4_{-1.4}^{+2.2}(stat.)_{-0.8}^{+4.4}(syst.)]\times10^{19}$ y. The experiment is under data taking with an aim to improve statistical uncertainties.

        Speaker: Oksana Polischuk (Institute for Nuclear Research of NASU, Kyiv, Ukraine)
      • 177
        Search for double beta decay of $^{106}$Cd

        Double beta (2$\beta$) decay is one of the most promising ways to search for effects beyond the Standard Model of particles and interactions (SM). Observation of neutrinoless mode of the decay ($0\nu2\beta$) will indicate the Majorana nature of the neutrino (particle is equivalent to its antiparticle), and the lepton number violation. Allowed in the SM two neutrino mode of the decay is the rarest nuclear process observed in several nuclei with the half-lives on the level of $10^{18} – 10^{24}$ years. An observation of the two neutrino double electron capture process was claimed in 2019, while other second-order weak-interaction “beta plus” processes such as electron capture with positron emission ($\varepsilon\beta^+$) and double positron decay ($2\beta^+$) have not been observed yet. A 215 g cadmium tungstate $^{106}CdWO_4$ crystal scintillator enriched in $^{106}Cd$ to 66% has been developed to search for 2$\beta$ processes in $^{106}Cd$. The experiment is carried out deep underground at the Gran Sasso National Laboratory of the INFN (Italy). In the third stage of the experiment the $^{106}CdWO_4$ detector was operated in coincidence with two $CdWO_4$ scintillation crystals with the natural abundance of cadmium and volume 114 cm$^3$ each. The $CdWO_4$ detectors are used to register $\gamma$-quanta expected in the 2$\beta$ processes in $^{106}Cd$, in particular 511 keV annihilation $\gamma$-quanta emitted in the $\varepsilon\beta^+$ and $2\beta^+$ decays. The new improved limit on half-life to the 2$\nu$EC$\beta^+$ decay of $^{106}Cd$ ($T_{1/2} > 2.1×10^{21}$ yr. 90% C.L.) approaches the region of the theoretical predictions of the decay half-life $T_{1/2} \sim 10^{21} - 10^{22}$ yr.

        Speaker: V.R. Klavdiienko (Institute for Nuclear Research of NASU)
    • Workshop on New physics paradigms after Higgs and gravitational wave discoveries Room 2

      Room 2

      • 178
        FIMP dark matter at the KOTO experiment

        The KOTO experiment has reported an excess of $K_L\to\pi^0\nu\bar\nu$ events above the standard model prediction, in tension with the Grossman--Nir bound. The GN bound heavily constrains new physics interpretations of an excess in this channel, but another possibility is that the observed events originate from a different process entirely: a decay of the form $K_L\to\pi^0X$, where $X$ denotes one or more new invisible species. We introduce a class of models to study this scenario with two light scalars playing the role of $X$, and we examine the possibility that the lighter of the two new states may also account for cosmological dark matter. We show that this species can be produced thermally in the presence of additional interactions apart from those needed to account for the KOTO excess. Conversely, in the minimal version of the model, dark matter must be produced non-thermally. In this case, avoiding overproduction imposes constraints on the structure of the low-energy theory. Moreover, this requirement carries significant implications for the scale of reheating in the early universe, generically preferring a low but observationally-permitted reheating temperature of 10 MeV. We discuss astrophysical and terrestrial signatures that will allow further tests of this paradigm in the coming years.

        Speaker: Benjamin Lehmann (UC Santa Cruz)
      • 179
        The Primordial Black Holes Variations

        In the age of gravitational wave astronomy, the possibility that some of the black holes in the universe have a primordial, rather than stellar origin, and that they might be a non-negligible fraction of the cosmological dark matter, is quite intriguing. I will review the status of the field, and comment on search strategies and future prospects for detection across many decades in black hole mass. I will also discuss how light primordial black holes could seed both baryonic and particle dark matter in the very early universe.

        Speaker: Stefano Profumo (University of California, Santa Cruz)
      • 180
        Updated Constraints on Asteroid-Mass Primordial Black Holes as Dark Matter

        Microlensing of stars places significant constraints on sub-planetary mass compact objects, including primordial black holes, as dark matter candidates. However, when the Einstein radius of the lens in the source plane is smaller than the size of the light source, amplification is strongly suppressed, making it difficult to constrain lenses with a mass below ~10^{-10} solar masses, i.e. asteroid-mass objects. Current constraints using Subaru HSC observations of M31 assume a fixed source size of one solar radius. We correct the HSC constraints by constructing a source size distribution based on the M31 PHAT survey and on a synthetic stellar catalogue, and by correspondingly weighing the finite-size source effects. We find that the actual HSC constraints are weaker by up to almost three orders of magnitude in some cases, broadening the range of masses for which primordial black holes can be the totality of the cosmological dark matter by almost one order of magnitude.

        Speaker: Nolan Smyth (University of California, Santa Cruz)
      • 181
        Large $N$-ightmare Dark Matter

        A dark QCD sector is a relatively minimal extension of the Standard Model that admits Dark Matter (DM) candidates, but requires no portal to the SM sector beyond gravitational interactions:
        A ``nightmare scenario'' for DM detection.
        We consider a minimal dark sector gauged under $SU(N)$ with a single flavor of light, vector-like dark quark.
        In the large-$N$ limit, this single-flavor theory becomes highly predictive, generating two DM candidates whose masses and dynamics are described by relatively few parameters:
        A light quark-antiquark bound state, the dark analog of the $\eta'$ meson, and a heavy bound state of $N$ quarks, the dark analog of the $\Delta^{++}$ baryon.
        We show that the latter may freeze-in with an abundance independent of the confinement scale,
        forming DM-like relics for $N \leq 10$, while the former may generate DM via cannibalization and freeze-out.
        We study the interplay of this two-component DM system,
        and determine the characteristic range of confinement scales,
        dark-visible sector temperature ratios, and $N$ that admit non-excluded DM,
        once effects of self-interaction constraints and bounds on effective degrees of freedom at the BBN and CMB epochs are included.

        Speaker: Logan Morrison (University of California, Santa Cruz)
    • Workshop on QCD Room 1

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      • 182
        QCD phase diagram and its dualities: baryon density, isospin and chiral imbalance

        Recently it has been shown that in the large-Nc limit (Nc is the number of colors of quarks) there exist duality correspondences (symmetries) in the phase portrait, which are the symmetries of the thermodynamic potential and the phase structure itself. The first one is a duality between the chiral symmetry breaking and the charged pion condensation phenomena. And there are two other dualities that hold only for chiral symmetry breaking and charged pion condensation phenomena separately. For example, we have shown that charged pion condensation does not feel the difference between chiral and isospin imbalances of the medium. They were shown to exist in the matter with chiral imbalance that can be produced in compact stars or heavy ion collisions.

        One of the key conclusions of these studies is the fact that chiral imbalance generates charged pion condensation in dense baryonic/quark matter. It was shown that our results in particular cases are consistent with the simulation of lattice QCD, which is possible in these cases. Duality was used to show that there takes place catalysis of chiral symmetry breaking by chiral imbalance.
        It was also shown that chiral imbalance generates the phenomenon of charged pion condensation in dense baryonic/quark matter even in the case of charge neutral matter, which is interesting in the context of the astrophysics of neutron stars. It is known that chiral imbalance can occur in high energy experiments of the collision of heavy ions, due to temperature and sphaleron transitions. Our studies show that different types of chiral imbalance can occur in the cores of neutron stars or in heavy-ion experiments, where large baryon densities can be reached, due to other phenomena - the so-called chiral separation and chiral vortical effects.

        Duality was shown to exist even in case of inhomogeneous condensates. This example shows that the duality is not just entertaining mathematical property but an instrument with very high predictivity power. The unified picture and full phase diagram of isospin imbalanced dense quark matter have been assembled. Acting on this diagram by a dual transformation, we obtained, in the framework of an approach with spatially inhomogeneous condensates and without any calculations, a full phase diagram of chirally asymmetric dense medium.

        Continuing our studies of dualities, we noted that there are dualities in 2-color QCD that are connected with additional symmetry of QCD with two colors namely Pauli-Gursey symmetry.
        It has been also shown that found duality is more fundamental and can be shown at the level of Lagrangian. It has been shown that duality is a property of real QCD. It is not bounded by large Nc approximation and exists in the cases of 2 and 3 and infinite number of colours.

        Part of the talk is
        based on:

        Phys.Rev. D95 (2017) no.10, 105010
        Phys.Rev. D97 (2018) no.5, 054036
        Phys.Rev. D98 (2018) no.5, 054030
        Eur.Phys.J. C79 (2019) no.2, 151
        JHEP 1906 (2019) 006
        Phys. Rev. D 100, 034009 (2019)
        JHEP 06 (2020) 148

        Speaker: Roman Zhokhov (IHEP)
      • 183
        Exclusive Reactions studied in the COMPASS experiment at CERN

        COMPASS is a multipurpose high energy physics experiment located at the M2 beamline of the SPS at CERN. In 2016 and 2017 COMPASS collaboration performed measurements of lepton-induced hard exclusive reactions using 160 GeV positively and negatively charged muon beams scattering of a liquid hydrogen target. The Deeply Virtual Compton Scattering (DVCS) and Hard Exclusive Meson Production (HEMP) processes, which were explored by the experiment, serve as an important input for the study of the Generalized Parton Distributions (GPDs). The GPDs encode the information about the correlations between longitudinal momentum and transverse spatial distribution of the partons inside the nucleon. They play a crucial role in the description of the 3-dimensional structure of the nucleon in QCD.
        Recent COMPASS results from DVCS and HEMP channels and their connection to the GPDs will be presented. Obtained results will be compared with available model predictions.

        Speaker: Mr Po-Ju Lin (Université Paris-Saclay (FR))
    • Plenary: Workshop on Physics at FAIR-NICA-SPS-BES/RHIC Room 1

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      • 184
        Overview of STAR experiment Results

        In this talk I will present an overview the results of the STAR experiment at RHIC at BNL.

        Speaker: Dr Ahmed M. Hamed (American University in Cairo)
      • 185
        Heavy flavor and quarkonia production at RHIC

        Heavy flavor and quarkonia production at RHIC

        Speaker: Sonja Kabana (Universidad Andres Bello (CL))
      • 186
        Intermittency in a parametrically driven magnetic particle

        In this work, we study the magnetization dynamics of an anisotropic particle subjected to a time dependent magnetic field. We use the dissipative Landau–Lifshitz–Gilbert equation to model the magnetization dynamics. To perform the characterization, we compute the Lyapunov exponents and the isospikes diagrams in two-dimensional phase diagrams of the parameter space of the particle. We observe multiple transitions among periodic states, revealing complex topological structures in the parameter space typical of dynamical systems [1]. To elucidate the finer details of the observed regular structures, iterative zooms are performed in the two-dimensional phase diagrams. In particular, we find islands of synchronization for the magnetization and the driven field. We have also detected and several shrimp structures with different periods. Finally, we show that there is a route towards chaotic dynamics that is mediated by intermittency.

        [1] J. A. Vélez et al., Chaos 30, 093112 (2020).

        Speaker: Prof. David Laroze (Instituto de Alta Investigación, CEDENNA, Universidad de Tarapacá)
    • 10:30 AM
      Coffee Break Room 1

      Room 1

    • Plenary: High Energy Particle Physics Room 1

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      • 187
        Physics Performance at CMS

        The CMS experiment have collected 130 $fb^{-1} $ of proton-proton collision events at 13 $TeV$. New tools and significant improvements in reconstruction algorithms, triggering, and calibration have been developed for the ultimate processing of the Run2 dataset. In this presentation, an overview of the performance of the reconstruction and identification of the physics quantities will be described.

        Speaker: Mia Tosi (Università degli Studi di Padova & INFN)
      • 188
        Recent CMS B physics results

        Highlights talk: Recent CMS B physics results

        Speaker: Federica Maria Simone (Universita e INFN, Bari (IT))
      • 189
        Trigger at CMS

        The CMS experiment uses a two-level triggering system consisting of the Level-1, instrumented by custom-design hardware boards and delivering an output rate of 100 kHz, and the High Level Trigger, a streamlined version of the offline reconstruction software running on a computer farm, which sends a rate of about 1 kHz to permanent storage. This system has been evolving continuously since the startup of the LHC. While the current system will basically remain in use for the next LHC running period (Run-3 starting in 2022), new features and algorithms are already being developed to take care of higher data loads due to increasing LHC luminosity and pileup but also of new experimental signatures to be investigated (in particular, displaced decay vertices stemming from relatively long-lived particles created in proton-proton collisions). Machine-learning techniques such as Boosted Decision Trees have already started to be implemented in the trigger electronics and will occupy a more important place in the future. %The use of High-Level Synthesis (HLS) tools will allow physicists to formulate trigger requirements in a language closer to that of data analysis. To avoid missing completely unexpected signatures from New Physics, studies are underway to employ anomaly detection using autoencoders.

        A major upgrade of the triggering system will then happen within the framework of the upgrade of the collider to the `High-Luminosity LHC', which will deliver a luminosity of $5-7.5 \times 10^{34} $cm$^{-2}$s$^{-1}$, corresponding to 140--200 pileup events. An important difference from the present system will be the fact that after the upgrade, information from the silicon strip tracker will be available already for the Level-1 Trigger. This will allow CMS to use so-called ``particle flow'' objects, i.e. signals seen not only in one subdetector but put together from all available subdetectors, resulting in much sharper efficiency turn-on curves for trigger objects. Also, trigger rates will rise by a factor of about 7.5 both at Level-1 (to 750 kHz) and at the High-Level Trigger (7.5~kHz) and the latency - the processing time available for arriving at the Level-1 trigger decision - will increase significantly, allowing for the use of more sophisticated algorithms at Level-1.

        Speaker: Mia Tosi (Università degli Studi di Padova & INFN)
      • 190
        The Belle II experiment: status and prospect

        The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the B factory facility at the Japanese KEK laboratory. The design luminosity of the machine is $8\times 10^{35}$ cm$^{-2}$s$^{-1}$ and the Belle II experiment aims to record 50 ab$^{-1}$ of data, a factor of 50 more than its predecessor. With this data set, Belle II will be able to measure the Cabibbo-Kobayashi-Maskawa (CKM) matrix, the matrix elements and their phases, with unprecedented precision and explore flavor physics with $B$ and charmed mesons, and $\tau$ leptons. Belle II has also a unique capability to search for low mass dark matter and low mass mediators. We also expect exciting results in quarkonium physics with Belle II. In this presentation, we will review the status of the Belle II detector, the results of the planned measurements with the full available Belle II data set, and the prospects for physics at Belle II.

        Speaker: Jerome Baudot (IPHC - Strasbourg)
    • Plenary: Heavy Ion Collisions and Critical Phenomena Room 1

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    • 1:30 PM
      Coffee Break
    • Parallel session: Heavy Ion Collisions and Critical Phenomena Room 1

      Room 1

      • 191
        Search for identical bands on the basis of level spin in SD nuclei

        The Identical Bands (IB's) phenomenon is studied theoretically in normal deformed bands. With the Variable Moment of Inertia (VMI) model, the phenomenological analysis of the Superdeformed (SD) identical bands in A~190 mass region are systematically explored. Also, the band head spin of these bands have been predicted using this approach. It was proposed that the truly identical bands, the band head moment of inertia, which depends intimately on the intrinsic structure of the rotational bands, should be similar. The gamma ray transition energies in the identical bands has found the difference of (1-3) keV only. The study indicates that each pair of conjugate nuclei has identical moment of inertia. The comparison between our theoretical results and available experimental data for the dynamical moment of inertia and gamma ray transition energies are obtained in good agreement.

        Speaker: Poonam Jain (Amity University, Noida)
      • 192
        Spatiotemporal structure of the pion emission in Au+Au collisions at √s = 19.6 GeV in UrQMD model

        The π+ emission is considered in Au+Au collisions at √s = 19.6 GeV in UrQMD model. The emission duration and time/hypersurface of maximal emission are analyzed within the two methods. The first one is based on the direct study of the pion last collision points in the UrQMD. The second one has utilized the specific approach for correlation femtoscopy analysis, developed and applied earlier for ultrarelativistic A+A collisions. The results demonstrate the consistency of the two methods also at moderate energies of nuclear collisions.

        Speaker: Yevhen Kravchenko (Taras Shevchenko National University of Kyiv)
      • 193
        Jet production and fragmentation at colliders (from HERA to EIC)

        Fragmentation (or in general, hadronization) is the transition from a colored and energetic parton to a colorless hadron is a rich and dynamical process in QCD quantified by the fragmentation function. Fast moving hadrons (or jets) are produced by the fragmentation of colored quarks or gluons that are produced during hard collisions at short distances. The determination of a characteristic time scale for the color neutralization would shed light on the properties of color confinement and help answer the question: how hadrons emerge out of quarks and gluons?

        Since the earliest days of collider physics, jets have been an important tool in the exploration of QCD and have provided important discoveries and insights, in all colliding systems, including e-e, e-p hadron-hadron, and nucleus-nucleus. With the advances in experimental techniques, and corresponding theoretical progress over time, jets have become precision tools for studying the partonic structure of matter. Starting at the Relativistic Heavy Ion Collider (RHIC) at BNL, a suppression by a factor of five of the yield of high $p_T$ hadrons in Au-Au collisions, compared to proton-proton collision at the same energy was observed and called “jet quenching”. The same phenomenon was confirmed by the heavy-ion program at the CERN’s Large Hadron Collider (LHC) where the jet quenching phenomenon was observed at much greater collision energies that became accessible, allowing new and more detailed characterization of the quark-gluon plasma. While interacting with the medium, a modification of the jet structure and a redistribution of jet energy as well as a modification of their fragmentation pattern is expected. Jets in (SI)DIS are also guaranteed to contribute at the Electron-Ion Collider (EIC) to a variety of key electronnucleus and electron-hadron physics topics in particular the study of hadronization, aiming to shed light on the nature of color neutralization and confinement.

        A selection of results (not focussed on a particular experiment) on jet physics will be discussed and compared to theoretical calculations. The measurements that will be discussed may include $p_T$-differential jet production cross sections or detailed studies of the parton shower through observables like the jet mass, jet fragmentation functions or jet substructure observables. Well defined jet shapes observables can also provide complementary information on the fragmentation process.

        Speaker: Alexandre Shabetai (Centre National de la Recherche Scientifique (FR))
    • Parallel session: Heavy Ion Collisions and Critical Phenomena Room 2

      Room 2

      • 194
        Renormalization group analysis of strongly anisotropic self-organized critical system subjected to isotropic turbulent flow

        A self-organized critical system under influence of turbulent motion of the environment is studied. The system is described by the anisotropic continuous stochastic equation proposed by Hwa and Kardar [{\it Phys. Rev. Lett.} {\bf 62}: 1813 (1989)]. The motion of the environment is modelled by the isotropic Kazantsev--Kraichnan ``rapid-change'' ensemble for an incompressible fluid: it is Gaussian with vanishing correlation time and the pair correlation function of the form $\propto\delta(t-t’) / k^{d+\xi}$, where $k$ is the wave number and $\xi$ is an arbitrary exponent with the most realistic values $\xi = 4/3$ (Kolmogorov turbulence) and $\xi \to 2$ (Batchelor's limit). Using the field-theoretic renormalization group, we find infrared attractive fixed points of the renormalization group equation associated with universality classes, i.e., with regimes of critical behavior. The most realistic values of the spatial dimension $d=2$ and the exponent $\xi=4/3$ correspond to the universality class of pure turbulent advection where the nonlinearity of the Hwa--Kardar (HK) equation is irrelevant. Nevertheless, the universality class where both the (anisotropic) nonlinearity of the HK equation and the (isotropic) advecting velocity field are relevant also exists for some values of the parameters $\varepsilon=4-d$ and $\xi$. Depending on what terms (anisotropic, isotropic, or both) are relevant in specific universality class, different types of scaling behavior (ordinary one or generalized) are established.

        Speaker: Dr Nikolay Gulitskiy (Saint Petersburg State University)
    • Parallel session: High Energy Particle Physics Room 2

      Room 2

      • 195
        Resonant production of Higgs and electroweak boson pairs as a signature of massive sgoldstinos at the LHC

        In this talk we present the study of sgoldstino phenomenology for sgoldstino masses 260-1000 GeV. Sgoldstinos are assumed to be produced in proton-proton collisions at the centre-of-mass energies $7-14$ TeV. We consider the impact of sgoldstino mixing with particles from Higgs sector on sgoldstino production cross section and sgoldstino branching ratio. We find a region in parameter space for which sgoldstino branching ratio is equal to $1:2:1$. In this region we can expect the increase in resonant Higgs pairs production. Using the results of experimental searches of the ATLAS and the CMS collaborations, we constrain gluino mass and scale of SUSY breaking. We also obtain the predictions for $W^+W^-$, $ZZ$ and $hh$ resonant production cross sections for $\sqrt{S}=14$ TeV.

        Speaker: Ms Ekaterina Kriukova (Institute for Nuclear Research of RAS)
    • Parallel session: Quantum Physics, Quantum Optics and Quantum Information Room 2

      Room 2

      • 196
        Computing knot invariants on a quantum computer

        We propose an experimental prove of concept for a quantum computer. The idea is to perform an explicit computation of Jones and HOMPLY polynomials for a specific knot. We apply this idea to the linear interferometer device, which is a working model for quantum computer, and in project to a quantum computer on cold atoms.

        Speaker: Sergey Mironov (INR)
    • Plenary: High Energy Particle Physics Room 1

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      • 197
        Heavy Tetraquarks and Pentaquarks

        Heavy Tetraquarks and Pentaquarks

        Speaker: Marek Karliner (Tel Aviv University (IL))
    • Plenary: Closing of extended session Room 1

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      • 198
        Closing of extended session