Conveners
A High Energy Particle Physics: A High Energy Particle Physics and B Heavy Ion Collisions and Critical Phenomena
- Tommaso Dorigo (Universita e INFN, Padova (IT))
A High Energy Particle Physics: A High Energy Particle Physics and B Heavy Ion Collisions and Critical Phenomena
- Thorsten Kuhl (Deutsches Elektronen-Synchrotron (DE))
A High Energy Particle Physics: A High Energy Particle Physics
- Swagata Mukherjee (Rheinisch Westfaelische Tech. Hoch. (DE))
A High Energy Particle Physics
- Aleksei Tanashkin (Far Eastern Federal University, Pacific Quantum Center)
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics: A High Energy Particle Physics, B Heavy Ion Collisions and Critical Phenomena and D Cosmology, Astrophysics, Gravity, Mathematical Physics
- There are no conveners in this block
A High Energy Particle Physics: A High Energy Particle Physics and B Heavy Ion Collisions and Critical Phenomena
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics: B Heavy Ion Collisions and Critical Phenomena: D Cosmology, Astrophysics, Gravity, Mathematical Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
A High Energy Particle Physics
- There are no conveners in this block
The LHCb detector at the LHC specialises in studying decays of beauty and charm hadrons, with excellent tracking, secondary vertex reconstruction and particle identification capabilities. Here we present an overview of recent highlighted results from the broad physics programme at LHCb, including the flavour anomalies and precise determination of CKM parameters. The detector is currently...
A review of recent ATLAS physics results will be given.
The ALICE experiment at the LHC plays a key role in the studies of the hot and dense QCD medium, the quark-gluon plasma, which can be recreated in ultrarelativistic heavy-ion collisions. Furthermore, ALICE has provided signi?ficant contributions to the investigation of a possible formation of such a medium in small collision systems, to the characterisation of the energy evolution of the gluon...
The High Luminosity Large Hadron Collider (HL-LHC) will deliver to the CMS experiment a design integrated luminosity of 3000 $fb^{-1}$, across its ten years long operations. This unprecedented amount of data will allow for precise measurements of the Standard Model and will extend the reach of new physics searches. The higher instantaneous luminosity will result in a larger number of...
The ALICE Collaboration completed the upgrade of the detector for the LHC Run 3 and is now commissioning for upcoming first collisions in LHC pilot runs for data taking. In parallel, R&D activities and simulation studies are being performed to define the future of the experiment beyond LHC Run 3.
Two detector upgrades are foreseen for the next long shutdown (LS3). The first is the...
After the observation of a Higgs boson in 2021, the cms collaboration started to study its properties and couplings. In this talk I will review recent work by the CMS Collaboration, spanning all active areas of the CMS Higgs Physics Program
The latest results on the production of Higgs boson pairs (HH) in the ATLAS experiment are reported, with emphasis on searches based on the full LHC Run 2 dataset at 13 TeV. In the case of non-resonant HH searches, results are interpreted both in terms of sensitivity to the Standard Model and as limits on kappa_lambda, i.e. a modifier of the Higgs boson self-coupling strength. Searches for new...
We present various recent jet and vector boson + jet precision measurements at 5 and 13 TeV performed with data recorded between 2015 and 2018, including processes whose production rates cover several orders of magnitude. We compare unfolded measurement to the latest fixed-order and event generator calculations, use jet data to extract PDFs and SM parameters, and investigate possible 4-quark...
The LHCb experiment offers a phase space which is complementary with respect to ATLAS and CMS.
Thanks to its forward acceptance and its precise vertex reconstruction, studying electroweak physics at LHCb can provide precise measurements of Standard Model parameters, like the W boson mass, and unique constraints to Parton Distribution Functions.
In this presentation the latest measurements on...
The discovery of the Higgs boson with the mass of about 125 GeV 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 of the Standard Model addressing such shortcomings introduce additional Higgs-like bosons which can be either...
With the full Run 2 pp collision dataset collected at 13 TeV, very detailed measurements of Higgs boson properties can be performed using its decays into bosons. This talk presents measurements of Higgs boson properties using decays into bosons and their combination with fermionic decays, including production mode cross sections and simplified template cross sections, as well as their interpretations.
Testing the Yukawa couplings of the Higgs boson to quarks and leptons is important to understand the origin of fermion masses. The talk presents several new measurements in Higgs boson decays to two bottom quarks or two tau leptons, searches for Higgs boson decays to two charm quarks or two muons, as well as indirect constraints of the charm-Yukawa coupling. The production of Higgs bosons in...
Recently, efforts on the building of Hf-based crystal scintillators
have been performed. The technique allows the implementation of the
so-called “source = detector” approach to study rare nuclear processes
in Hf isotopes with higher efficiency with respect to the HP-Ge
spectrometry. In this talk, a review of recent studies concerning rare
nuclear processes in Hf isotopes will be addressed.
Preliminary studies on double beta decay processes in $^{106}$Cd were performed by using a cadmium tungstate scintillator $^{106}$CdWO$_4$ (mass 215.4 g) enriched in $^{106}$Cd at 66%, together with two natural CdWO$_4$ scintillation detectors. Their geometry was such to cover a large part of the solid angle around the enriched crystal. The experiment is enclosed in the DAMA/R&D setup, located...
The half-life of ${}^{212}$Po (one of the ${}^{232}$Th daughters) was measured with the highest up-to-date accuracy using a thorium-loaded liquid scintillator. The scintillator was produced by a solution of thorium and trioctylphosphine oxide complex in toluene in 0.1 % mass concentration of Th (${}^{232}$Th activity in scintillator is 4.61 Bq/mL). 12 mL of the scintillator was optically...
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for 0νββ decay that has been able to reach the one-tonne mass scale. The detector, located at the LNGS in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. CUORE began its first physics data run in 2017 at a base temperature of...
The NA62 experiment at CERN reports searches for K+ → e+N, K+→μ+N and K+→μ+νX decays,
where N and X are massive invisible particles, using the 2016-2018 data set.
The N particle is assumed to be a heavy neutral lepton, and the results are expressed as upper limits
of O(10−9) and O(10−8) of the neutrino mixing parameter |Ue4|2 and |Uμ4|2, improving on the earlier
searches for heavy neutral...
In the framework of the Standard Model we present a new theoretical predictions for partial widths, double and single differential distributions for four-leptonic decays of $B_s$ - mesons. We consider the contributions of $φ (1020)$ - resonance, $J/ψ$ - and $ψ(2S)$ - resonances (excluding resonant regions), non-resonance contribution of the $b \bar{b}$ - pairs, leading contribution of “weak...
Statistical models are widely used for investigation of complex system’s
behaviour. Most of the models considered in the literature are formulated on regular
lattices with nearest neighbour interactions. The models with non-local interaction
kernels have been less studied. In this article we investigate an example of such a
model – non-local q-color Potts model on a random d = 2 lattice....
Searches for supersymmetry in CMS detector are addressed. The searches target a number of diverse production modes of the supersymmetric particles decaying into a variety of final states. The latest results using the proton-proton collision data with luminosity up to 137 fb-1 recorded by the CMS detector at center of mass energy 13 TeV during the LHC Run 2 are presented.
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. This talk will present the latest results from searches conducted by the ATLAS experiment, covering both strong and electroweak SUSY particle production processes. The searches target multiple final states and...
The ATLAS experiment has performed measurements of B-meson rare decays proceeding via suppressed electroweak flavour changing neutral currents, and of mixing and CP violation in the neutral Bs meson system. This talk will focus on the latest results from the ATLAS collaboration, such as rare processes B0s → mu mu and B0 → mu mu, and CP violation in the B0s —> J/psi phi decays. In the latter,...
The presence of a non-baryonic Dark Matter (DM) component in the Universe is inferred from the observation of its gravitational interaction. If Dark Matter interacts weakly with the Standard Model (SM) it could be produced at the LHC. The ATLAS experiment has developed a broad search program for DM candidates, including resonance searches for the mediator which would couple DM to the SM,...
The ZnWO$_4$ crystal scintillators are promising detectors for low counting experiments thanks to the high level of radio-purity, and reasonably high optical and scintillation properties. Moreover, ZnWO$_4$ is an anisotropic scintillator which can offer a unique possibility to exploit the so-called directionality approach in order to investigate the presence of Dark Matter candidates that...
The next generation of x-ray satellite missions, like XRISM or Athena, will be equipped with state-of-the-art instrumentation, delivering high-resolution spectra. However, the accuracy of parameters like elemental composition, velocity, density, and temperature will be limited by the uncertainties and availability of atomic data, like line positions, line strengths, and cross-sections for...
The SM process where four top quarks are produced in proton-proton collisions is very rare process with a cross section of the order of 12 fb^{-1} at NLO accuracy in QCD+EWK. Studies of this process can provide limits to the top—quark Yukawa coupling using limits on the cross section. In addition, it is expected to provide insight to many BSM as these models modify the production of four tops....
In recent years, Machine Learning (ML) methods have become ubiquitous in High Energy Physics (HEP) research. This talk will explore current areas of ML for HEP research including event classification, object reconstruction, jet tagging, and accelerated ML inference for trigger environments. I will also discuss current opportunities and challenges in the ML for physics space and ways...
Based on a number of features from proton-proton collisions taken during Run 1 data taking period at the LHC, a boson with a mass around the Electro-Weak scale was postulated such that a significant fraction of its decays would comprise the Standard Model (SM) Higgs boson and an additional scalar, S. One of the implications of a simplified model, where S is treated a SM Higgs boson, is the...
Elliptic $\varepsilon_2$ and triangular $\varepsilon_3$ eccentricities
arising in initial state of relativistic heavy-ion collisions are
studied within the framework of a geometrical model with event-by-event
fluctuations. Elliptic eccentricity is shown to be determined mainly
by the average collision geometry, whereas the triangular one is
related merely to the fluctuations. Assuming the...
The development of metallic magnetic calorimeters (MMCs) has resulted in a new class of detectors for precision X-ray spectroscopy such as the maXs detectors [1] (cryogenic micro-calorimeter arrays for high resolution X-ray spectroscopy experiments at FAIR), being developed within the SPARC collaboration. MMCs are energy dispersive detectors which combine the very high energy resolution...
Particle-particle correlations, either rapidity-rapidity or rapidity-azimuthal angle correlations was already an important tool for hadron collider physics since the early 70s. Recently, we studied one-particle rapidity distributions and two- particle rapidity-rapidity correlations at hadron colliders revisiting one of the old models, the Chew-Pigniotti multiperipheral model and we were...
The sentence length (number of words/syllables in a sentence) distributions of texts (novels, speeches, etc), vary between different languages and different persons (authors or speakers). In this paper we proposed an entropy method based on the sentence lengths of texts, to explore the characteristics of the English and Chinese languages, and the different persons. The main results show that...
The NA62 experiment at CERN collected a large sample of charged kaon decays into final states
with multiple charged particles in 2016-2018. This sample provides sensitivities to rare decays with
branching ratios as low as 10-11.
Results from searches for lepton flavour/number violating decays of the charged kaon and the neutral pion to final states containing a lepton pair based on this...
With the PICR hydrodynamic model, we study the polarization splitting between $\Lambda$ and $\bar{\Lambda}$ at RHIC BES energy range, based on the meson field mechanism. Our results fit to the experimental data fairly well.
Besides, two unexpected effect emerges: (1) the baryon density gradient has non-trivial and negative contribution to the polarization splitting; (2) for 7.7 GeV Au+Au...
Chiral and SU(3) symmetry breaking in the non perturbative regime is approached with lattice calculation and effective field theories, but still lacking experimental results especially in the strangeness sector, leaving unanswered questions in nuclear, particle and astrophysics. To this end, kaon-nucleon/nuclei scattering interaction has traditionally been studied by scattering measurements at...
The study of low-energy antinucleons interactions with nuclei are of great interest for many branches of physics. In particular, information on nuclear elastic scattering and annihilation can give some clues to answer open questions like antimatter-matter asymmetry in the Universe and provide useful information for quark and nuclear interactions models.
Moreover, the determination of...
The decay K+→π+ νν ̅ , with a very precisely predicted branching ratio of less than 10-10, is among
the best processes to reveal indirect effects of new physics.
The NA62 experiment at CERN SPS is designed to study the K+→π+ νν ̅ decay and to measure its
branching ratio using a decay-in-flight technique. NA62 took data in 2016, 2017 and 2018, reaching
the sensitivity of the Standard...
We work on the important signature of quark gluon plasma (QGP)where effective quark mass incorporate in place of finite quark mass. Two photon spectra is plotted using quasiparticle treatment. The result from finite value of quark mass and effective quark mass are found almost same. This indicate that our calculation are not invalidate with the effect of effective mass of quark.
Therefore...
The Relativistic Heavy Ion Collider (RHIC) is the world’s only polarized proton collider, capable of reaching center of mass energies up to 510 GeV. The STAR experiment has been carrying out a cold QCD program, to gain deeper insight into the spin structure and dynamics of the proton. The collection of longitudinally polarized data concluded in 2015. One of the goals of this data is to study...
Numerous potential models are used to calculates the various properties of the given quarkonium system in high energy physics. The investigation of quarkonium systems is widely studied by using the solution of the second order differential equation. Various methods to solve the second-order differential equation such as Schrodinger equation, Dirac equation and Klein-Gordon equation with...
The NA62 experiment at CERN reports new results from studies of radiative kaon decays K+ ➔ e+ vg (Ke2g) and K+ ➔ pi0e+vg (Ke3g), using a data sample recorded in 2017-2018. The sample comprises O(10k) Ke2g candidates and O(100k) Ke3g candidates with sub-percent background contaminations. Preliminary results with the most precise measurement of the and branching ratios, determination of...
Search for a two nucleon system or the dineutron (n2) as a bound particle or the two nucleon nuclei without protons was raised for a first time in 1946 [1]. In this publication, the possibility to generate mono energy neutrons as well as the dineutron in the d-t nuclear reaction was considered. Since that time until nowadays the dineutron was the subject to hunt in nuclear reactions on light...
Recent results from the ATLAS experiment on the charmonium production, Bc production and decays, and exotic heavy hadrons will be presented. The measurement of J/psi and psi(2S) differential cross sections at large transverse momentum values in proton-proton collisions at 13 TeV will be reported. The measurement of the ratios of the Bc+ and B+ production cross sections in proton-proton...
We will present results on Spin Density Matrix Elements (SDMEs) measured in hard exclusive muoproduction of $\rho ^0$ and $\omega $ mesons on the proton at COMPASS using 160 GeV/$c$ polarised $\mu ^{+}$ and $\mu^{-}$ beams scattering off a liquid hydrogen target. The measurements cover the range 5 GeV/$c^2$ $< W <$ 17 GeV/$c^2$, 1.0 (GeV/$c$)$^2$ $< Q^2 <$ 10.0 (GeV/$c$)$^2$ and 0.01...
Many theories beyond the Standard Model (BSM) predict new phenomena accessible by the LHC which prevent for example the need of fine-tuning of the Higgs Boson mass, expand the gauge sectors of the SM or explore the dark sector through possible long lived particle decays. Searches for new physics models are performed using the ATLAS experiment at the LHC focusing on exotic signatures that can...
Belle II at the electron-positron collider SuperKEKB is the
successor to the Belle experiment. Its design luminosity is 6 · 1035/(cm2s),
40 times the record achieved at KEKB/Belle, at the same center of mass
energy in the bottomonium region. Over the next years it is expected to
accumulate an integrated luminosity of 50 ab−1, collecting by far the
largest sample of B-mesons at...
Recently, in 2020 the LHCb Collaboration searches a new doubly heavy $\Xi_{bc}^0$ baryon decaying into $D^0 pK^-$ having mass in the range from 6.7 - 7.2 $GeV/c^2$. To study the properties of $\Xi_{bc}^0$ baryon (dcb) containing two different heavy quarks gives an ideal platform to understand the hadron spectroscopy and Quantum Chromodynamics (QCD). Under the Regge phenomenology, we have...
Based on work 2105.11102 (https://doi.org/10.1016/j.physletb.2021.136524).
We argue that the fixed target experiment PS191 operating on a proton beam of 19.2 GeV at CERN in the eighties was sensitive to hypothetical light scalars produced by mesons and decaying to charged particles. The experiment was dedicated to searches for sterile neutrinos produced in weak meson decays and decaying into...
The ENUBET experiment, included in the CERN Neutrino Platform effort as NP06/ENUBET, is developing a new neutrino beam based on conventional techniques in which the flux and the flavor composition are known with unprecedented precision ($\mathcal{O}$(1%)). Such a goal is accomplished monitoring the associated charged leptons produced in the decay region of the ENUBET facility. Positrons and...
The measurement of $\varphi$ meson production is a unique tool to explore the characteristics of the quark-gluon plasma (QGP). The $\varphi$ meson has a small interaction cross section and longer lifetime than the QGP, therefore its yields and elliptic flow are good probes of QGP properties. The $\varphi$ meson production might be sensitive to the strangeness enhancement in the QGP and can...
The current status of holographic QCD (HQCD) applications to the studies of the formation and properties of quark-gluon plasma produced in heavy ions collisions will be presented.
I will take special attention to effects predicted by HQCD at high baryon densities attainable at the NICA experimental complex as well as to effects of rotations and huge magnetic fields in a produced quark-gluon plasma.
T2K is an accelerator-based neutrino experiment providing world-leading measurements of the parameters governing neutrino oscillation. T2K data enabled the first 3sigma exclusion for some intervals of the CP-violating phase \delta_{CP} and precision measurements of the atmospheric parameters \Delta_m^{2}{32}, sin^2(\theta{23}). T2K uses a beam of muon neutrinos and antineutrinos produced at...
The searches for light Higgs bosons after the discovery of the 125 GeV Higgs boson would be presented with the proton collision data collected by the CMS experiment at the LHC at a centre-of-mass energy of 13 TeV. The searches for light pseudoscalar Higgs bosons pair produced from the decay of the 125 GeV Higgs boson and resulting in various final states (4$\mu$, 4$\tau$, 2$\mu$2$\tau$ and...
SoLid (Search for short oscillation using $^6$Li detector) is measuring the flux of electron anti-neutrinos close to the 60 MW BR2 nuclear reactor at SCK$\bullet$CEN in Mol, Belgium. The detector is installed at a distance of just over 6 m from the compact reactor core and is constructed from an array of 5x5x5 cm$^3$ PVT based scintillator cubes, which are optically coupled to $^6$Li:ZnS(Ag)...
The evidence for the existence of dark matter, so far is based on its gravitational effects. Nevertheless, many theoretical models assume other non-gravitational very-weak interactions between dark matter and ordinary matter, and to test this hypothesis, different experiments are trying to directly detect dark matter signals at particle accelerators.
This elusiveness of dark matter has...
The forward BFKL equation is discretized in order to understand momenta difussion into the infrared and ultraviolet by means of a semi-infinite matrix. This matrix is square truncated so an exponentiation is possible, leading to asymptotic eigenstates related to the gluon Green's function at large matrix size. There is also a relation between this truncation and the XXX Heisenberg spin=-1/2...
The present work is mainly focussed on the estimation of the level scheme of $ K=0$ and $K=5$ bands in ${^{240}Am}$ using TQPRM model. While exploring the actinide region we have noticed that the experimental level scheme is not systematic to study the properties of ${^{240}Am}$ nucleus. We have also made the comparison between the theoretical energies and experimental energies which lead...
We present new results of the DANSS experiment on the searches for sterile neutrinos. They are based on approximately 4 million of inverse beta decay events collected at 10.9, 11.9 and 12.9 meters from the reactor core of the 3.1 GW Kalinin Nuclear Power Plant in Russia. The neutrino spectrum dependence on the fuel composition is also presented. We have also measured the reactor power using...
SND@LHC is a compact and stand-alone experiment to perform measurements with neutrinos produced at the LHC in a hitherto unexplored pseudo-rapidity region of 7.2 < $\eta$ < 8.6, complementary to all the other experiments at the LHC. The experiment is to be located 480 m downstream of IP1 in the unused TI18 tunnel. The detector is composed of a hybrid system based on an 800 kg target mass of...
Measurements that exploit electroweak boson scattering processes have become increasingly common at the Large Hadron Collider in the last few years. In this talk, we present the study of the electroweak Zy production via both two neutrino and lepton final states. In addition, we present precision differential cross-section measurements of WW production in association with at least one jet. We...
Various Supersymmetry (SUSY) scenarios, including split SUSY and anomaly or gravity-mediated SUSY-breaking scenarios, lead to signatures with long-lived particles. Searches for these processes may target either the long lived particle itself or its decay products at a significant distance from the collision point. These signatures provide interesting technical challenges due to their special...
The High-Luminosity Large Hadron Collider (HL-LHC) is expected to deliver an integrated luminosity of up to 3000 fb$^{-1}$. The very high instantaneous luminosity will lead to about 200 proton-proton collisions per bunch crossing (“pileup”) superimposed to each event of interest, therefore providing extremely challenging experimental conditions. Prospects for selected topics in the SM and...
Several theories beyond the Standard Model predict the existence of new particles
decaying into pairs of gauge bosons. These states generally have masses larger
than that of the Higgs boson. The latest ATLAS results on searches for such resonances in final
states with leptons and photons based on pp collision data collected at 13 TeV will be
presented.
We present the first search for a light scalar arising from the decay of a B meson at CMS enabled by the novel technique of data scouting. In order to explore otherwise inaccessible phase space at low dimuon mass and non-zero displacement from the interaction point, a dedicated high rate dimuon trigger stream is used. No significant excesses are found and stringent constraints set on a wide...
The spectral shape of forbidden beta-decays is a crucial benchmark for nuclear physics calculations and has important implications also for astroparticle physics experiments.
In the list of interesting isotopes to be measured, Indium-115 is one of the most suitable due to the relatively high Q-value (497.954 keV) and half-life (4.41 $\times$ 10$^{14}$ yr).
We propose to exploit a cryogenic...
The evolution of the QGP system created in high energy nuclear
collisions is characterized by strong electromagnetic fields and
highly vortical fluid. A number of new phenomena have been predicted
to exist under such conditions, including the Chiral Magnetic and
Vortical Effects, and particle global and local polarization.
This talk is a review of current and future experimental...
