In this paper we discuss the inclusive $J/\psi$ production in proton-proton collisions accompanied by production of two parton showers. We demonstrate
that this mechanism gets dominant contribution from the region which can be theoretically described by CGC/Saturation approach. Numerically,it gives a substantial contribution to the $J/\psi$ production, and is able to describe the...
The Large Hadron-electron Collider (LHeC) is a proposed upgrade of the LHC at CERN. It consists of an energy recovery linac (ERL) in racetrack configuration providing an intense electron beam to collide with the HL-LHC, HE-LHC and the FCC-hh proton (ion) beams achieving per nucleon centre-of-mass energies 1.3-3.5 (0.8-2.2) TeV and luminosities $\sim 10^{34(33)}$ cm$^{−2}$ s$^{-1}$,...
A measurement of the top quark Yukawa coupling from the top quark-antiquark production as function of the mass of the top quark pair and the rapidity difference is presented. Corrections due to weak boson exchange, including the Higgs boson, between the top quarks can produce large distortions of differential distributions near the energy threshold of top quark pair production and at high...
The observation of the Reactor Antineutrino Anomaly, at the beginning of this decade, has revived the interest in short-baseline experiments that probe the disappearance of electron antineutrinos. In addition, the recent evidence for a distortion in the reactor antineutrino energy spectrum, seen by some of those short-baseline experiments, has questioned our current models even more.\
The...
Beauty quarks are considered to be effective probes of the Quark-Gluon Plasma (QGP) produced in ultra-relativistic heavy-ion collisions. Since the b quark has a large mass, its production takes place mostly in initial hard scatterings, and it is calculable using perturbative QCD. Thus, beauty quarks can be considered as ideal self-generated penetrating probes of the created medium and utilized...
Events containing muons in the final state are an important signature for many analyses being carried out at the Large Hadron Collider (LHC), including both standard model measurements and searches for new physics. To be able to study such events, it is required to have an efficient and well-understood muon trigger. The ATLAS muon trigger consists of a hardware-based system (Level 1), as well...
Transverse missing energy momentum from non-interacting particles is one of the important characteristics for many analyses especially for Beyond Standard Model physics searches. To study these events at the Large Hadron Collider (LHC) with the ATLAS experiment an efficient trigger selection is needed. The ATLAS transverse missing momentum trigger uses calorimeter-based global energy sums...
The ATLAS experiment at CERN has started the construction of upgrades for the "High Luminosity LHC", with collisions due to start in 2026. In order to deliver an order of magnitude more data than previous LHC runs, 14 TeV protons will collide with an instantaneous luminosity of up to 7.5 x 10^34 cm-2s-1, resulting in much higher pileup and data rates than the current experiment was designed to...
In order to achieve affordable and compact high-energy particle accelerators, machines with high accelerating gradients are necessary. The beam-driven plasma wakefield accelerator is a novel accelerator technique being developed for this purpose. The AWAKE experiment at CERN is the first proton-driven plasma wakefield accelerator experiment. The experiment relies on seeded self-modulation to...
We construct the Barut-Girardello coherent states for charge carriers in 2D-Dirac-Weyl materials immersed in a constant homogeneous magnetic field which is orthogonal to the sample surface. We consider the situation in which the membrane is deformed uniformily and uniaxially, avoiding the generation of pseudo-magnetic fields. For that purpose, we solve the Dirac-Weyl equation with an...
I discuss findings from my recent comparison of Bayesian and frequentist approaches to resonance searches ([1902.03243][1]). I introduce a counting experiment based on a search for the Higgs boson from which I generate pseudo-data. With that pseudo-data, I contrast the evolution of the $p$-value and posterior as we accumulate data and directly compare global $p$-values and the posterior of the...
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. The sensitivity to find new physics Beyond the...
Factorization of short and long-distance interactions is heavily broken in hard diffractive hadronic collisions. In particular, abelian forward diffractive radiation of direct photons, Drell-Yan dileptons, and gauge bosons Z, W, by a parton is forbidden. Nevertheless, a hadron can diffractively radiate in the forward direction due to a possibility of soft interaction with the spectators. This...
When designing a high-energy, circular accelerator, like the upcoming High-Luminosity LHC or the future FCC, it is essential to have a reliable estimate of the expected beam losses and beam lifetime. A good prediction of the beam losses is essential to anticipate potential issues leading to quenches of the superconducting magnets or damage to the collimation system, while the beam lifetime is...
SoLid is a short baseline neutrino experiment, which is currently operating a 1.6 tons detector at the SCK•CEN BR2 research reactor in Belgium. SoLid will address the study of the so called Reactor Antineutrino Anomaly (RAA), whose origin could be the existence of a light sterile neutrino state with a mass around the eV scale. In addition, it will perform a new measurement of the...
The axion is a hypothetical particle proposed to solve the strong $CP$ problem, and also a candidate for dark matter. Galactic halo axions which are non-relativistic can be converted into photons under a strong magnetic field and detected with a microwave resonant cavity. Since P. Sikivie had proposed this experimental method, many experiments have excluded some mass regions with certain...
For several years, LPSC Grenoble and collaborators have been studying the particle detection performance of large-size diamond sensors with the prospect of using them in medical or/and nuclear applications. CVD single & poly crystals as long as heteroepitaxial sensors have been exposed to beta and alpha particles, to 8.5 keV x-ray bunches at ESRF, to fission products at ILL, to protons at...
Charm production in charged current deep inelastic scattering has been measured for the first time in $e^\pm p$ collisions, using data collected with the ZEUS detector at HERA, corresponding to an integrated luminosity of 358 pb$^{−1}$ . Results are presented separately for $e^+ p$ and $e^− p$ scattering at a centre-of-mass energy of $\sqrt{s} = 318$ GeV within a kinematic phase-space region...
The CMS experiment selects events with a two-level trigger system, the Level-1 (L1) trigger and the High Level trigger (HLT). The HLT is a farm of approximately 30K CPU cores that reduces the rate from 100 kHz to about 1 kHz. The HLT has access to the full detector readout and runs a streamlined version of the offline event reconstruction. In Run 2 the peak instantaneous luminosity reached...
The SoLid detector was constructed during 2017 and started to take data in December 2017. Commissioning a new detector implies defining and understanding a whole set of new variables. On the one hand the environmental conditions are followed, and on the other hand quantities related to the stability of the detector are monitored.
Cosmic muons are ideal for studying the stability of SoLid,...
After the discovery of the Higgs boson, one of the main targets of particle physics is the measurement of the Higgs boson couplings to fermions and vector bosons. Moreover, also of great interest is the observation of the interaction of the Higgs boson with itself, known as the Higgs boson self-coupling. The self-coupling is very loosely constrained by EWK precision measurements therefore new...
We consider possible effects of neutrino electric charge (millicharge) and charge radius [1,2] on the neutrino-atom interaction processes such as (i) atomic ionization by neutrino impact and (ii) coherent elastic neutrino-nucleus scattering. The bounds [3,4] on the neutrino millicharge and charge radius that follow from, respectively, the GEMMA and COHERENT experiments are presented and...
Measurement of the lithium isotopes 6Li and 7Li fluxes and ratios based on data collected by AMS during the first 7 years of operation are presented. Prospects for measurement of beryllium and boron isotopic ratios with AMS will be also discussed.
In a crystal, atoms arranged in a precise and periodic pattern interact together as planes or axes with incoming charged particles. Thus, is possible to substitute the random incoherent scattering of each atom with continuum potentials and fields. These planar and axial fields are extremely intense (up to ~1E9 V/cm for Si, up to 1E12 V/cm for heavier elements) and exceed artificial ones....
The JUNO experiment is a multi-purpose anti-neutrino oscillation experiment with the main objective of determining the neutrino mass ordering ($\nu$MO). The baselines to its two major reactors are both 53 km. JUNO's goal is to achieve 3$\sigma$ sensitivity of $\nu$MO with 6-year of data taking, so it is critical to obtain an unprecedented energy resolution, better than 3% at 1 MeV. The JUNO...
The direct search for dark matter (DM) at the sub-GeV/c² mass scale gained special interest during the last years, mainly motivated by various theoretical models. To search for individual DM-electron interactions in Si-semiconductor devices a readout noise level of less than 1e- RMS is required.
One possible technique which promise a sub-electron noise level is the *Depleted P-channel Field...
We study the structure of compact objects that contain non-self annihilating, self-interacting dark matter admixed with ordinary matter made of neutron star and white dwarf materials.
We find that the total mass of the compact objects increases with decreasing dark matter particle mass. In the strong interacting case and for dark matter particle masses in the range 1-10 GeV, the...
The LHC delivered more than 150/fb of collision data to ATLAS between 2015-2018. In order to produce reliable physics results of high quality, the data is subject to intense scrutiny to ensure detector conditions are well understood and to eliminate any detector-related problems affecting the dataset. This talk discusses the data quality (DQ) monitoring procedures in place to guarantee the...
The COMET experiment at J-PARC aims to search for the charged lepton flavor violating process of neutrinoless muon to electron (mu-e) conversion with an improvement of a sensitivity by a factor of 10000 to the current limit. When the mu-e conversion occurs, almost all the energy of the muon mass is carried out by the electron which is expected to have the monochromatic energy of about 105 MeV....
The CMS experiment implements a sophisticated two-level triggering system composed of the Level-1, instrumented by custom-design hardware boards, and the High Level Trigger, a streamlined version of the offline reconstruction software running on a computer farm (more than 30k CPU cores). In 2017, the LHC delivered proton-proton collisions at a centre-of-mass energy of 13 TeV with a peak...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi purpose neutrino experiment, currently under construction in China, whose main detector consists in a spherical tank filled by 20 kt of liquid scintillator. Beside the determination of the neutrino mass hierarchy, JUNO can be operated to study astrophysical phenomena that presume the emission of a huge number of neutrinos, such as...
The Large Hadron-electron Collider (LHeC) is a proposed upgrade of the LHC at CERN. It consists of an ERL providing electrons to collide with the HL-LHC, HE-LHC and the FCC-hh proton (ion) beams achieving per nucleon centre-of-mass energies 1.3-3.5 (0.8-2.2) TeV and luminosities $\sim 10^{34(33)}$ cm$^{−2}$ s$^{-1}$, respectively. These three configurations will enlarge the HERA kinematic ...
Sophisticated machine learning techniques, like computer vision, are state of the art in modern day research. These technologically advanced algorithms have promising potential in search for physics beyond Standard Model in Large Hadron Collider (LHC). Most of the computer vision tasks are surrounded around convolutional neural networks (CNN), which can provide powerful tools for...
The Muon Ionization Cooling Experiment, MICE, has demonstrated transverse emittance reduction through ionization
cooling. Transverse ionization cooling can be used either to prepare a beam for acceleration in a neutrino factory or
for the initial stages of beam cooling in a muon collider. Later stages of ionization cooling in the muon collider require
the longitudinal emittance to be...
The absolute luminosity calibration for LHC experiments is derived from dedicated beam separation scans, known as van der Meer (VdM) scans. However, VdM scans are performed with special beam optics, wide beams, and fewer, well-separated bunches to reduce potential systematic effects, and only once a year. In order to use the calibration obtained from a VdM scan under physics data-taking...
The High Luminosity LHC (HL-LHC) aims to increase the LHC data-set by an order of magnitude in order to increase its potential for discoveries and precision measurements. Starting approximately in 2026, the HL-LHC is expected to reach the peak luminosity of 7.5×10^34cm^-2s^-1 which corresponds to conditions where up to 200 inelastic proton-proton collisions can occur per bunch crossing which...
The physics reach and feasibility of the Future Circular Collider (FCC) with centre of mass energies up to 100\,TeV and unprecedented luminosity have been studied and published in a Conceptual Design Report (CERN-ACC-2018-0058). The new energy regime of the FCC-hh opens the opportunity for the discovery of physics beyond the standard model.
In order to exploit the full physics potential of...
The physics reach and feasibility of the Future Circular Collider (FCC) with centre of mass energies up to 100\,TeV and unprecedented luminosity have been studied and published in a Conceptual Design Report (CERN-ACC-2018-0058). In order to exploit the full physics potential of such a collider, a conceptual design of a possible reference detector has been developed. Proton-proton collisions at...
We present a Grand Unified Theory where the usual E6 gauge coupling unification is supplemented by a local SU(2)×U(1) family symmetry. We discuss its origin inspiring our model by an embedding into E8 which can be seen as an unifying force. We argue that the presence of such a family symmetry has remarkable implications for both high-scale and low scale physics: First, while the usual 273...
The physics exploitation of the precision data to be collected in future runs of the LHC requires highly accurate theory predictions, which are obtained through the calculation of higher orders in perturbation theory. For many processes of interest, Next-to-Next-to-Leading-Order results are required. At present, only observables involving up to four particles are available at this order. The...
The LHCb Collaboration is planning an Upgrade II, a flavour physics experiment for the high luminosity era. This will be installed in LS4 (2030) and targets an instantaneous luminosity of 1.5 x10^34 cm-2 s-1, and an integrated luminosity of at least 300fb-1. Modest consolidation of the current experiment will also be introduced in LS3 (2025). Physics goals include probing new physics scenarios...
Forward-backward (FB) multiplicity correlations carry important information on the early dynamics of ultra-relativistic heavy ion collisions. In this talk, new data on forward-backward charged particle correlations and multiplicity fluctuations in Pb–Pb collisions at $\sqrt{s_{\rm NN}}= 2.76$ TeV are presented. The data are recorded with the ALICE detector at the LHC. We focus on the...
We consider unfavoured light quark/antiquark to D meson fragmentation. We discuss nonperturbative effects for small transverse momenta. The asymmetry for D+ and D- production measured by the LHCb collaboration provides natural constraints on the parton (quark/antiquark) fragmentation functions. We find that already a fraction of fragmentation probability is sufficient to account for the...
A review of the heavy flavour identification methods and the performance results of the calibration of various taggers in Run 2 data at CMS is presented. The Machine Learning methods play an important role in the development of the identification algorithms and significantly improve the performance of heavy flavour jet tagging in the offline event reconstruction, as well as in the online event...
The production of pairs of Higgs bosons provides us unique information on the Higgs sector and on the mechanism underlying electroweak symmetry breaking. This poster will present the search for the resonant and non-resonant production in the production of a pair of Higgs bosons, where one decays into two photons and the other one into a bottom quark-antiquark pair. The analysis used...
The latest results with Higgs boson decays to tau leptons at a centre-of-mass energy of 13 TeV are presented.
The latest set of results on Higgs decay to a W boson pair is presented. With a statistics of 36/fb collected by the CMS experiment at the LHC at 13 TeV center of mass energy, the Higgs to WW decay has been observed at CMS with more than 5 sigma for the first time, providing a significant contribution to the current fit of the Higgs boson couplings to fermions and vector bosons.
Motivated mainly by future upgrades at high-luminosity LHC (HL-LHC) and detectors at future
colliders, most of the HEP R&D collaborations are focusing on the design of new particle detectors
for operation under very high particle flow.
In the field of Micro-Pattern-Gaseous-Detectors, the small-pad resistive Micromegas prototypes
were designed to overcome the actual limitations of standard...
We show the proper way to extract characteristics of tetraquark states within the method of QCD sum rules. We emphasize that duality relations for correlators involving tetraquark currents have fundamental differences compared with the duality relations for the correlators of bilinear quark currents: namely, the $O(1)$ and $O(\alpha_s)$ terms in the OPE for the exotic correlators exactly...
Drell-Yan events with high-rapidity electrons provide strong constraints on the proton parton density functions, and the highest sensitivity for the measurement of the electroweak mixing angle. Optimal electron identification and energy calibration are crucial to exploit these features. The identification relies on a multi-variate likelihood technique to separate prompt electrons from hadrons....
An influence of a magnetic field on beta-processes is investigated in a partially transparent medium of the inner part of a supernova envelope. Inside this part, an electron-positron plasma is ultra-relativistic. As for neutrinos, they are not in the thermodynamic equilibrium with the medium. We obtain simple analytical expressions for reaction rates of beta-processes as well as energy and...
Using four near and four far functionally identical antineutrino detectors, the Daya Bay Reactor Neutrino Experiment measures the antineutrino flux and spectrum from six commercial reactor cores. I will report a new precise measurement of the reactor antineutrino flux using 2.2 million inverse beta decay (IBD) events collected with the Daya Bay near detectors in 1230 days. The dominant...
KaTie is a parton level event generator that can deal with space-like initial-state partons, which occur in factorization prescriptions for hadron scattering that involve non-vanishing momentum components transverse to scattering hadrons. Improved transverse momentum dependent factorization (ITMD) is such a prescription. It allows to include saturation effects into hadron collisions in a...
We present an analysis of the inclusive decay Bs -> DsX tagged with semi-inclusive decay Bs -> DsXl, where X denotes a final state that may consist of additional hadrons or photons and l is an electron or muon. Our Bs decays are contained in the 121.4 fb-1 Y(5S) data sample collected by the Belle detector at the KEKB asymmetric-energy e+e- collider..
In order to achieve high luminosity, next-generation high-energy electron-positron colliders demand beam overlap at the interaction point to the nanometer level. The design of low-latency, high-bandwidth beam-collision feedback systems will be presented. The latest experimental results of prototype systems tested with beam at the KEK/ATF2 will be shown. The performances achieved with the...
The contribution is dedicated to an amplitude analysis of the $e^+e^- \to 4\pi$ and $\tau \to 4\pi \nu$ processes. The amplitude analysis is performed using experimental data from the CMD-3 detector at the VEPP-2000 collider in the energy range 0.9--2.007 GeV. In the study the dominance of the $e^+ e^- \to \omega \pi^0 \to 4\pi$ and $e^+ e^- \to a_1 \pi \to 4 \pi$ amplitudes is proved, as well...
We suggest the gauge groups SU(3), SU(2) and U(1) to share a common origin in U(3).
We take the Lie group U(3) to serve as an intrinsic configuration space for baryons. A spontaneous symmetry break in the baryonic state selects a U(2) subgroup for the Higgs mechanism. The Higgs field enter the symmetry break to relate the strong and electroweak energy scales by exchange of one quantum of...
In heavy-ion physics, the interest on heavy-flavour measurements in small hadronic systems, like p-Pb and pp, has been for a long time limited to the possibility of providing tests of perturbative QCD, measurements of cold-matter effects in the nuclear medium, and the baseline for observations of hot-medium effects in heavy-ion collisions.
However, such measurements have recently gained...
The CMS and ATLAS detectors will face challenging conditions after the upgrade of the LHC to the High Luminosity LHC. In particular, the granularity of the pixel detectors should increase to mitigate the effect of pile-up. Two possible sensor geometries are being investigated, 50x50 um2 and 25x100 um2, to handle these conditions. One of the main factors in choosing the pixel geometry is...
The Daya Bay Reactor Neutrino Experiment was designed to measure $\theta_{13}$, the smallest mixing angle in the three-neutrino mixing framework, with unprecedented precision. The experiment consists of eight identically designed detectors placed underground at different baselines from three pairs of nuclear reactors in South China. Since Dec. 2011, the experiment has been running stably for...
The electromagnetic sampling calorimeters projected for the forward region of the future linear collider are presently being designed by the FCAL Collaboration. The LumiCal and BeamCal detectors are dedicated systems for luminosity measurements at the ILC/CLIC experiments. The LumiCal detector provides a precise measurement of the integrated luminosity, while the BeamCal is designed for...
The preliminary calibration of the integrated luminosity for the Run-2 ATLAS data sample of pp collisions at sqrt(s)=13 TeV is described. The absolute luminosity scale is determined using van der Meer scans during dedicated running periods in year, and extrapolated to the physics data-taking regime using complementary measurements from several ATLAS subdetectors. The total uncertainties on the...
In the extension of the standard model with two right hand neutrinos and considering an approximate lepton number symmetry, we can have these neutrinos with masses in the scale of the GeV and with large mixing. We found that splitting in the masses of the right handed neutrinos could be connected to a lepton number violation (LNV) parameter, and that therefore we will have important...
Multiple Coulomb scattering and energy loss are well known phenomena experienced by charged particles as they raverse a material. However, from recent measurements by the MuScat collaboration, it is known that the simulation code (GEANT4) available at the time overestimated the scattering of muons in low Z materials. Updates to GEANT4 have brought the simulations in line with the MuScat data...
A detailed understanding of neutrino and antineutrino interactions with nuclei is essential for the precise measurement of neutrino oscillations at long-baseline experiments, such as T2K. Moreover, since T2K utilises a water Cherenkov far detector, the study of neutrino cross sections on water is imperative. The T2K experiment has recently been equipped with a new additional near detector,...
The intrinsic electron neutrino contamination of the T2K neutrino beam provides the single largest background in the measurement of electron neutrino appearance at the far detector. These electron neutrinos can be measured directly in the T2K near detector, ND280. With the transition to antineutrino running the selection of both electron neutrinos and electron anti-neutrinos are important....
The exclusive photoproduction reaction $\gamma p \to \psi(2S) p$ has been studied with the ZEUS detector in ep collisions at HERA using an integrated luminosity of 350 pb$^{-1}$, in the kinematic range 30 < W < 180 GeV, Q$^2$ < 1 GeV$^2$, |t| < 5 GeV$^2$, where W is the photon proton centre-of-mass energy, Q$^2$ - the photon virtuality and t – four-momentum transfer at the proton vertex. The...
We present a measurement of the ttbb cross section, using data collected in pp collisions at sqrt(s) = 13 TeV by the CMS experiment at the LHC corresponding to an integrated luminosity of 35.9 fb-1. The cross section is measured in the all-jet decay channel of the top quark pairs by selecting events containing at least eight jets, of which two are identified as b jets. A combination of...
Probing the top-Higgs Yukawa coupling precisely is currently one of the important mandates of the LHC experiments. While the magnitude of this coupling can be determined by studying the Higgs production with top anti-top pair, the sign can be estimated using production of Higgs boson in association with a single top quark. The data collected at the LHC is not yet sensitive to the process,...
The Higgs to tau tau decay is a considerably important decay channel because it allows to directly measure the Yukawa coupling to fermions and to measure the Higgs boson properties. During the Run 2 of the LHC the energy has increased to $\sqrt{s}=13$ TeV and the luminosity has increased as well. This improvement leads to more precise measurements and with higher significance, in particular...
In the technique of modern experiment on accelerators coordinate gas-filled wire detectors based on thin-walled tubes, straws, made of polyethylene terephthalate film are increasingly used. This type of detectors has numerous of advantages. To ensure high coordinate accuracy of the straw detector, the material from which the straw is made is also required to preserve its basic physical...
The flavour transition mechanisms of supernova neutrinos as they propagate outward from the deep inside of the supernova are yet to be determined. We study the time-evolution patterns of different neutrino flavours in various flavour transition scenarios. With simulation data of supernova neutrinos, we calculate the neutrino event rates at different kinds of detectors for different flavour...
The Compact Muon Solenoid (CMS) detector is one of the two multi-purpose experiments at the Large Hadron Collider (LHC) and has a broad physics program. Many aspects of this program depend on our ability to trigger, reconstruction and identify events with final state muons in a wide range of momenta, from few GeV to the TeV scale. Displaced muons can also be used as a benchmark for new new...
The neutrino oscillation measurement program of Hyper-K requires unprecedented accuracy for the modeling of neutrino fluxes and neutrino-nucleus interaction cross sections.
The Hyper-K experiment will include a suite of near detectors to control systematic uncertainties on neutrino flux and interaction models. In this talk we will describe the baseline
Hyper-K near detector suite, which...
We further develop a recently proposed new approach to the description of the relativistic neutrino flavour $\nu_e^L \leftrightarrow \nu_{\mu}^L$, spin $\nu_e^L \leftrightarrow \nu_{e}^R$ and spin-flavour $\nu_e^L \leftrightarrow \nu_{\mu}^R$ oscillations in a constant magnetic field that is based on the use of the exact neutrino stationary states in the magnetic field. The neutrino flavour,...
After a brief history of two known types of neutrino mixing and oscillations, including neutrino spin and spin-flavour oscillations in the transversal magnetic field, we perform systematic study of a new phenomenon of neutrino spin and spin-flavour oscillations engendered by the transversal matter currents on the bases of the developed quantum treatment of the phenomenon. Possibilities for...
Recent advances in neural networks and harsh pileup conditions in the second half on LHC Run 2 with on average 38 PU interactions, have sparked significant developments in techniques for jet tagging and missing transverse momentum reconstruction. Through the study of jet substructure properties, jets originating from quarks, gluons, W/ Z/Higgs bosons, top quarks and pileup interactions are...
It is known [1] that neutrino electromagnetic interactions open a window to new physics. The present talk is dedicated to new results of our recently performed detailed studies of new effects in neutrino spin, spin-flavour and flavor oscillations under the influence of the transversal matter currents [2] and a constant magnetic field [3]. These two effects can be summarized as follows:
1) it...
After the second long-shutdown, in 2021, the LHC will be a new machine in many respects and produce collisions with a center-of-mass energy at or near 14 TeV. The instantaneous luminosities can be expected to reach 3x10^34 cm^-2s^-1, which is three times the original design value. The mean number of interactions per bunch crossing is expected to go up to 80. To meet these challenges of this...
I will review the relevance of new quarkonium observables such as the associated production along with a Standard Model boson ($\gamma$, $W$ and $Z$), with another quarkonium, with another heavy quark as well as with light hadrons or jets in order to improve our understanding of the mechanisms underlying quarkonium production as well as the physics of multi-parton interactions, in particular...
The proposed T2HKK experiment involves placing a neutrino detector in Korea in the path of the T2HK beam, to collect data at an additional baseline of 1100 km. This setup will allow the measurement of neutrino oscillation probabilities at two different baselines with the same beam. In addition the detectors are also well suited to observe atmospheric neutrinos. In this work, we explore the...
The anomalies in the flavor ratios $R_D$ and $R_{D^*}$ provide a hint of physics beyond the Standard Model. Previously it was shown that the polarization fraction of the $D^*$ meson in the $B\rightarrow D^*\,\tau\,\bar{\nu}$ decay provides a defining signature for tensor new physics. Recently Belle collaboration measured this quantity to be $0.60\pm 0.08 \pm 0.04$. Here we do a re-analysis of...
The Jiangmen Underground Neutrino Observatory (JUNO) is a next generation multi-purpose antineutrino detector currently under construction in Jiangmen, in China. The reactor electron antineutrinos of two power plants at a baseline of 53 km will be detected in the central part of the detector, which consists of 20 ktons of liquid scintillator contained in a 35 m diameter acrylic sphere. The...
The observation of single top quark production in association with a Z boson and a quark (tZq) is presented. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017, and correspond to an integrated luminosity of 77.4...
A new model-independent imaging method, the Lévy expansion, plays an important role in the analysis of the differential cross section of elastic hadron-hadron scattering. It enables for the first time to quantify simultaneously the signatures of the Odderon, internal substructures in the proton, as well as a subtle emergence of its hollowness at ultra-high collision energies directly from the...
The theoretical study of correlations of the linear
and circular polarizations in the system of two photons has been performed. The polarization of a two-photon
state is described by the one-photon Stokes parameters and by the
components of the correlation "tensor" in the Stokes space.
It is shown that the correlations between the Stokes parameters
in the case of the
two-photon decays $\pi^0...
The electromagnetic processes of annihilation of $(e^+ e^-)$ pairs into heavy
flavor lepton pairs are theoretically studied in the one-photon approximation, using the technique of helicity amplitudes . For the process $e^+e^- \rightarrow \mu^+\mu^-$, it is
shown that -- in the case of the unpolarized electron and positron -- the final
muons are also unpolarized but their spins prove to be...
ATLAS is one of the four major experiments at the Large Hadron Collider (LHC) at CERN. It is a general-purpose particle physics experiment run by an international collaboration and is designed to exploit the full discovery potential and the huge range of physics opportunities that the LHC provides.
The tracking performance of the ATLAS detector relies critically on its 4-layer Pixel Detector,...
The CMS Electromagnetic Calorimeter (ECAL), is a high granularity lead tungstate crystal calorimeter operating at the CERN LHC. The original design placed a premium on excellent energy resolution. Excellent energy resolution and efficient identification for photons are essential to reconstruct the Higgs boson in the H->gg decay channel, for measurements of the self-coupling of Higgs bosons and...
The CMS Phase-2 Outer Tracker (OT) will be built by using two types of modules (strip-strip modules and pixel-strip modules) both consisting of two silicon sensors with a few millimeter separation. To read out the two types of modules four OT specific custom made chips are required: CBC (CMS Binary Chip [1]), SSA (Short Strip ASIC [2]), MPA (Macro Pixel ASIC [3]) and CIC (Concentrator...
The LHCb particle identification (PID) system is composed of two ring-imaging Cherenkov detectors, a series of muon chambers and a calorimeter system. A novel strategy has been introduced in Run 2, where the selection of PID calibration samples for charged particles and neutrals is implemented in the LHCb software trigger. A further processing of the data is required in order to provide...
After the Higgs discovery, precise measurements become vital for the experimental particle physics. A powerful Higgs factory, the Circular electron- positron Collider (CEPC), is proposed. The Particle Flow Oriented Detector Design and Reconstruction have been chosen as the Baseline for the CEPC CDR study. Our work reports the physics performance on jet reconstruction of the CEPC baseline design.
The ATLAS experiment at LHC uses a trigger system consisting of a first level hardware trigger and a higher level software trigger. The Level-1 muon trigger system selects muon candidates with six transverse momentum thresholds and associates them with a correct LHC bunch crossing. The Level-1 Muon Barrel Trigger uses Resistive Plate Chambers (RPC) detectors to generate trigger signals for...
The ATLAS experiment has a rich physics program of Standard Model measurements and searches for physics Beyond the Standard Model involving tau leptons. Most of these analyses depend on an efficient tau-lepton trigger that can cope with the overwhelming background from multi-jet events produced in proton-proton collisions at the Large Hadron Collider.
The ATLAS trigger system is composed of...
The Belle II experiment at the SuperKEKB collider of KEK (Japan) will accumulate 50 ab$^{−1}$ of $e^+e^−$ collision data at an unprecedented instantaneous luminosity of $8\cdot 10^{35}$ cm$^{−2}$s$^{−1}$, about 40 times larger than its predecessor. The Belle II vertex detector plays a crucial role in the rich Belle II physics program, especially for time-dependent measurements. It consists of...
CMS features three luminosity subdetectors capable of providing real-time (“online”) luminosity on a bunch-by-bunch level independently of the main CMS data acquisition system: the Fast Beam Conditions Monitor (BCM1F), the hadronic forward calorimeter (HF), and the Pixel Luminosity Telescope (PLT). These luminometers have operated since the beginning of Run 2 (2015–2018) at the LHC. In order...
The identification and isolation strategies to discriminate prompt muons from background, and their performance with 13 TeV data collected with the CMS experiment are shown. This poster will present main studies concerning muon performance of the CMS muon detector and muon reconstruction with proton-proton collisions in Run II .
Hyper-Kamiokande, a 187~kton fiducial volume water Cherenkov detector to be built in Japan, is the next generation of the Super-Kamiokande experiment. Its broad physics program includes nucleon decay, neutrinos from astronomical and human-made beam, with the main focus to determine the leptonic CP violation. To detect the weak Cherenkov light generated by neutrino interactions or proton decay,...
Spin correlations for the $\Lambda \Lambda$ and $\Lambda \bar{\Lambda}$ pairs, produced in relativistic heavy-ion collisions, and related angular correlations at the joint registration of space-parity nonconserving hadronic decays of two hyperons are theoretically analyzed. These correlations
give important information about the character and mechanism of multiple processes, and the advantage...
Precision luminosity calibration is critical to determine fundamental parameters of the standard model and to constrain or to discover beyond-the-standard-model phenomena at LHC. The luminosity determination at the LHC interaction point 5 with the CMS detector, using proton-proton collisions at 13 and 5.02 TeV during Run 2 of the LHC (2015–2018), is reported. The absolute luminosity scale is...
The hypertriton lifetime presents one of the key open questions of hypernuclear physics. The separation energy of the $\Lambda$ inside the hypertriton is only 130 keV and it implies a small change of the $\Lambda$ wave function inside the nucleus and hence the lifetime of the hypertriton is expected to be close to that of the free $\Lambda$ hyperon.
The average value of the results obtained...
Advances in photo-lithographic techniques during the last twenty years have lead to the development of micro-pattern gaseous detectors (MPGD). Their main features include high rate capability and radiation hardness, excellent spatial resolution, good time resolution, reduced radiation length and possible flexible geometries. In recent years the further development of MPGDs concentrated on...
The Muon Ionization Cooling Experiment (MICE) at RAL has collected extensive data to study the ionization cooling of
muons. Several million individual particle tracks have been recorded passing through a series of focusing magnets in
a number of different configurations and a liquid hydrogen or lithium hydride absorber. Measurement of the tracks
upstream and downstream of the absorber has...
A measurement of the inclusive top quark-antiquark pair production cross section in proton proton collisions at a centre-of-mass energy of 13 TeV is used by the CMS experiment, together with the theoretical prediction at next-to-next-to-leading order, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions....
We investigate photo-production of vector mesons J/Psi and Upsilon measured both at HERA and LHC, using 2 particular fits of inclusive unintegrated gluon distributions. The fits are based on non-linear Balitsky-Kovchegov evolution (Kutak-Sapeta gluon; KS) and next-to-leading order Balitsky-Fadin-Kuraev-Lipatov evolution (Hentschinski-Sabio Vera-Salas gluon; HSS). We find that linear...
This poster presents the search for Higgs boson decays into Z/γ* or J/ψ plus a photon, in the dilepton plus one photon final state. These are important rare decay channels to be pinned down for the standard model (SM) measurement and can be used to probe new physics. The results are based on data collected by the CMS detector at the LHC from proton-proton collision at 13TeV with a...
In the next years, several experiments will try to perform a precise measurement of the neutrino mass hierarchy, among these there are also reactor neutrino experiments, such as JUNO and RENO 50. One of the challenges that must be overcome in this kind of experiment is the uncertainty on the reactor neutrino spectrum: as became clear with the discovery of the “5 MeV bump”, the theoretical...
The accuracy of the LHCb Vertex Locator (VELO) has ensured excellent detector performance, with a track reconstruction efficiency above 98%, and a vertex resolution along the beam axis of about 70 microns. The real-time alignment and calibration procedure developed by the LHCb experiment for Run 2 (2015-2018) for the full detector, including the VELO, provided extremely stable conditions...
A program of measuring the light hadrons production in exclusive $e^+e^- \to$ hadrons processes is in place at BABAR with the aim to improve the calculation of the hadronic contribution to the muon $g-2$. We present the most recent results obtained by using the full data set of about 470 fb$^{-1}$ collected by the BABAR experiment at the PEP-II $e^+e^-$ collider at a center-of-mass energy of...
After the Higgs discovery, precise measurements become vital for the experimental particle physics. A powerful Higgs factory, the Circular electron- positron Collider (CEPC), is proposed. Adequate detector design and reconstruction algorithm are fundamental to this project. The Particle Flow oriented detector design is proposed to the CEPC and a Particle Flow algorithm, Arbor, is optimized...
Many supersymmetric scenarios feature final states with non-standard final state objects. The production of massive sparticles can lead to the production of boosted top quarks or vector bosons, high-pt b-jets. At the same time, transitions between nearly mass-degenerate sparticles can challenge the standard reconstruction because of the presence of very soft leptons or jets (including the...
Higgs Effective Field Theory (HEFT) can be used to study vector-boson elastic scattering at the high energies relevant for the LHC. For most of the parameter space, the scattering is strongly interacting, with the minimal Standard Model being a remarkable exception. From its one-loop treatment complemented with dispersion relations and the Equivalence Theorem, we derive two different...
The upgrade of the CMS Resistive Plate Chamber (RPC) chambers consists partially of the installation of new RPC detectors in the forward region. High background conditions are expected in this region during the high-luminosity phase of the Large Hadron Collider (HL-LHC), therefore an improved RPC detector has been proposed which sustains a higher rate capability. Apart from the modified...
The standard model is one of the most successful theories at describing the strong, weak, and electromagnetic forces and the interactions between the elementary particles. The scalar boson discovered in 2012 at the Large Hadron Collider (LHC) might be consistent with the Higgs boson predicted by the standard model, thus further validating this theoretical framework. However, the experimental...
A search for a heavy Higgs boson decaying to a pair of W bosons in the mass range from 200 GeV to 5 TeV is presented. The analysis is based on proton-proton collisions recorded by the CMS experiment at the CERN LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1 at sqrt(s) = 13 TeV. The decay of the W boson pair is reconstructed in fully leptonic and semi-leptonic final states....
In 2012, the ATLAS and CMS Collaborations announced the discovery of a new state with a mass around 125 GeV, compatible with the Standard Model Higgs boson. The measurements of this new particle’s properties are important to test the predictions of the Standard Model.
A measurement of the Higgs-beauty quark coupling through the Higgs boson production associated with a Z or W boson in the...
A search for a new high-mass resonance decaying to a tau lepton and a neutrino will be reported in this poster. The analysis uses proton-proton collision data collected by the CMS experiment at the LHC at 13 TeV, corresponding to an integrated luminosity of 35.9 inverse fb. The search utilizes hadronically decaying tau leptons. An interpretation of results will be shown in the context of W'...
A search for heavy neutral Higgs bosons is performed using a data from proton–proton collisions at √ s = 13 TeV recorded by the ATLAS detector at the LHC. The heavy resonance is assumed to decay to τ + τ − with at least one tau lepton decaying to final states with hadrons and a neutrino. Results are interpreted in the hMSSM benchmark scenario.
The LHC Run II with a center-of-mass energy of 13 TeV has opened new doors for searching possible effects of physics beyond the standard model. New physics can be parametrized by the addition of higher dimensional operators to the Standard Model Lagrangian in the so called Effective Field Theory approach.
In this poster we summarize an analysis which focuses on operators in the electroweak...
Supersymmetry is a promising extension of the Standard Model of Particle Physics (SM) as it provides a solution to some of the open questions of the SM. If squarks and gluinos are beyond the reach of the LHC, the production of charginos and neutralinos could be the dominant production mode of supersymmetric particles in sqrt(s)=13 TeV proton-proton collisions at the LHC. A search for...
A search is presented for the direct pair production of a chargino and a neutralino pp→χ̃±1χ̃02, where the chargino decays to the lightest neutralino and the W boson, χ̃±1→χ̃01(W±→ℓ±ν), while the neutralino decays to the lightest neutralino and either the Z boson χ̃02→χ̃01(Z→ℓℓ) or the 125 GeV Higgs boson, χ̃02→χ̃01(h→ℓℓ). The final states considered for the search have large missing...
Natural supersymmetry suggests a light top squark (t1), possibly within the discovery reach of Run 2 of the LHC. This poster presents the latest result of an analysis targeting a compressed region of the stop phase space where the mass difference between the stop and the lightest neutralino (χ̃01) is smaller than the top-quark mass, using pp collision data collected over the full Run-2 of the...
A search for dark matter (DM) particles produced in association with a Higgs Boson,
where the Higgs boson decays to pair of Z bosons and each Z decays to two leptons
(e, μ) is presented. The experimental signature includes a Higgs boson produced
together with large missing transverse energy. The study is performed using data
collected in proton-proton collisions during 2016 with an...
Dark sector models can explain the relic abundance of universe and thus constitute attractive scenarios. We present the searches for dark sector particles in B decays at Belle. We also search for the dark Gauge boson Z' and light dark matter chi, in the process e+ e- → mu+ mu- Z' and e+ e- → mu+ mu- chi chi_bar. Other analyses related to dark sector are also covered. The analyses are based on...
The smallness of neutrino masses provides a tantalizing allusion to physics beyond the standard model (SM). Heavy neutral leptons (HNL), such as hypothetical sterile neutrinos, accommodate a way to explain this observation,through the see-saw mechanism. If they exist, HNL could also provide answers about the dark matter nature, and baryon asymmetry of the universe. A search for the production...
Recent CMS searches for lepton flavour violating decays of the Higgs boson and of a heavy Higgs boson will be shown in this poster.
The results for searches of narrow dijet resonances at high masses (above 1.8 TeV) will be presented with the full Run II dataset. The model independent cross section limits, as well as the interpretations under a variety of new physics models will be shown.
A search for the supersymmetric partners of quarks and gluons (squarks and gluinos) in final states containing hadronic jets and missing transverse momentum, but no electrons or muons, is presented. Two analysis techniques, the multi-bin fit and multi-variate analysis, are newly introduced in order to further discriminate target signals and backgrounds. Starting from the definition of the...
The NOvA experiment, which uses two functionally identical liquid scintillator detectors over an 810 km baseline in the Fermilab NuMI beam, has the potential to set world-leading limits on the $\theta_{24}$ and $\theta_{34}$ parameters governing sterile neutrino oscillations by searching for a deficit of neutral current interactions compared to that predicted at the two detectors. An updated...
This poster presents the latest results on searches for pair production of supersymmetric partners of the top and bottom quarks using the LHC proton-proton collision data, recorded by the ATLAS detector at a center of mass energy of √s=13 TeV from 2015 to 2018, corresponding to an integrated luminosity of 139 fb−1. Different final states and models are considered for each search.
Decay modes with two oppositely charged leptons of different flavor correspond to lepton flavor violating (LFV) decays and are essentially forbidden in the Standard Model (SM) because they can occur only through lepton mixing. Decay modes with two leptons of the same charge are lepton-number violating (LNV) decays and are forbidden in the SM. Hence, decays of the form $D^0 \to hh'll’$ provide...
This poster presents the search for the strong pair production of squarks and gluinos in events with one isolated lepton, jets and missing transverse momentum in the final state. In this analysis, strongly interacting supersymmetric particles are assumed to decay into charginos χ̃±1 and light quarks, and each chargino subsequently decays into a W boson and the lightest neutralino χ̃01. The...
The results for searches of broad dijet resonances at high masses (above 1.8 TeV) will be presented with the full Run II dataset. The cross section limits for generic spin1 and spin2 quark-quark and gluon-gluon resonances will be presented. The coupling vs mediator mass limits will be also shown for a leptophobic Z' that couples to quarks as well as DM particles.
Last year results of the TOTEM collaboration [1] suggest that the odderon exchange can be responsible for a disagreement of theoretical calculations and the TOTEM data [3] for elastic proton-proton scattering. Similar conclusion can be drawn when comparing recent result for $\sqrt{s}$ = 2.76 TeV with the Tevatron data [2]. It is premature to draw definite conclusion. Here we present some...
Within quantum field theory, the homogeneous Bethe–Salpeter formalism offers a Poincaré-covariant (albeit not always easy-to-handle) description of bound states. Driven by the desire to arrive at a (hopefully more easily controllable) analytic approach to bound states, various instantaneous reductions of the Bethe–Salpeter equation have been proposed. Among these are the well-known spinless...
To extend the LHC physics program, it is foreseen to operate the LHC in the future with an unprecedented high luminosity. To maintain the experiment's physics potential in the harsh environment of this so-called phase-2, the detector will be upgraded. At the same time the detector acceptance will be extended and new features such as a L1 track trigger will be implemented. Simulation studies...
The Gas Electron Multiplier (GEM) was first introduced by Fabio Sauli in 1997, which is a thin layer of an insulating polymer, coated on both sides with copper and chemically perforated with a high density of microscopic holes. The GEM detectors, which are built using GEM foils, have been utilized for various applications due to their excellent spatial resolution, high rate capabilities and...
The study of single top quark inclusive production provides important insight into the electroweak processes of the standard model of elementary particles and into the structure of the proton. It also enables a direct measurement of the magnitude of the Cabibbo–Kobayashi–Maskawa (CKM) matrix elements. Among the production channels, the t-channel process is the dominant mechanism in...
The production of a top quark in association with a W boson (tW) is one of the single top processes that takes place at LHC. The interest of this production relies on the quantum interference at NLO with the top-antitop pair production: one of the most relevant processes in the LHC. The measurements of the tW production cross section using data collected by CMS at 13 TeV are presented. The...
The instantaneous luminosity of the Large Hadron Collider at CERN will be increased by about a factor of five with respect to the design value by undergoing an extensive upgrade program over the coming decade. The largest phase-1 upgrade project for the ATLAS Muon System is the replacement of the present first station in the forward regions with the New Small Wheels (NSWs) during the long-LHC...
The identification of b-hadrons at low-pT can play a crucial role in a variety of analyses, such as those where soft b-hadrons are produced by new physics signals as in compressed SUSY searches for stop/sbottom production or in analyses that require heavy flavour jet vetos. Such b-hadron identification is a particularly challenging task, owing to the relatively short decay length of such...
In the limit of very low momentum transfer to one of the nucleons,
the analytical expression for the spectrum $dW(k)$ of relative momenta
${\bf k}$ of the neutron and proton, produced at the deuteron peripherical
breakup, is obtained taking into account the $S$-wave function
of the deuteron. It should be stressed that namely this formula for $dW(k)$ describes the spectrum of relative...
Small-angle polarized elastic pp scattering dominated by Coulomb-nuclear interference (CNI) open a unique chance to access the spin component of the Pomeron. Our analysis of data on single-spin asymmetry at $\sqrt{s}=200$ GeV reveals a considerable spin-flip component, missed in the previous analyses because of lack of absorptive corrections. Analogous, much more precise measurements at lower...
A viable Two Higgs Doublet Model with CP violation of spontaneous origin is presented. In this model, based on a flavoured $Z_2$ symmetry, the lagrangian respects CP invariance, while the vacuum has a CP violating phase, which is able to generate a complex CKM matrix. Scalar mediated flavour changing neutral couplings are analysed, stressing the connection between the generation of a complex...
Resistive Plate Chambers working at the LHC experiments are operated with large fractions of Tetrafluoroethane (C2H2F4) commonly known as R-134a that has a high Global Warming Power (GWP) and has been recently banned by the European community. Many studies are ongoing to find a good replacement for such component for RPCs working in avalanche mode at the LHC. One interesting alternative is the...
The factorizability of the transverse proton density functions in x and y is assumed in the analysis of single-plane van der Meer (VdM) scans for absolute luminosity calibration. A correction to the calibration constants for nonfactorization effects in the proton density is then determined. The precision of the evaluation of this correction is one of the dominant sources of systematic...
Experimental measured value of the muon magnetic moment $a_{\mu} = \frac{g_{\mu}-2}{2}$ has a long-standing and well known discrepancy comparing with Standard Model prediction that has been narrowed down within a range $3.2-3.6\,\sigma$ after years of efforts made by experimentalists and theoreticians. Previous results of dipion cross section $\sigma_{\pi\pi} = \sigma(e^+e^-\to\pi^+\pi^-)$...
We study the process $e^+e^-\to e^+e^- \eta'$ in the double-tag mode and measure for the first time the $\gamma^*\gamma^* \to \eta'$ transition form factor $F_{\eta'}(Q_1^2, Q_2^2)$ in the momentum-transfer range $2< Q_{1,2}^2<60$ GeV$^2$. The analysis is based on data with an integrated luminosity of about 470 fb$^{-1}$ collected at the PEP-II $e^+e^-$ collider with the BABAR detector at...
DsTau is a project which has been proposed at the CERN SPS to study tau-neutrino production aiming at providing important data for future $\nu_\tau$ studies. A precise measurement of the $\nu_\tau$ cross section would enable a search for new physics effects in $\nu_\tau$ CC interactions. It also has practical importance for the next generation experiments for neutrino oscillation studies and...
The CMS drift tubes (DT) muon detector, built for standing up the LHC expected integrated and instantaneous luminosities, will be used also in the High Luminosity LHC (HL-LHC) at a 5 times larger instantaneous luminosity and, consequently, much higher levels of radiation, reaching about 10 times the LHC integrated luminosity. Initial irradiation tests of a spare DT chamber at the CERN gamma...
A 20 kton large volume liquid scintillator detector is being constructed at Jiangmen, China, to determine the neutrino mass hierarchy, and measure the neutrino oscillation parameters. The excellent energy resolution and the large fiducial volume anticipated for the JUNO detector offer exciting opportunities for addressing many important topics in neutrino and astroparticle physics. High...
The Deep Underground Neutrino Experiment (DUNE) is a dual-site experiment for long-baseline neutrino oscillation studies, and for neutrino astrophysics and nucleon decay searches. The Far Detector of DUNE will consist of four 10-kt liquid argon time-projection-chambers (LAr TPC) placed in the Sanford Underground Research Facility (SURF) at 1300 km distance from the neutrino beam. The...
We summarize the current status of particle physics, collecting the established deviations from the standard model of particle interactions both at the energy and the intensity frontier as well as in cosmology. We propose a specific U(1) extension of the standard model of particle interactions and discuss the possible consequences of the model concerning the observed deviations. We present...
When technicolor (TC), QCD, extended technicolor (ETC) and other interactions become coupled through their different Schwinger-Dyson equations, the solution of these equations are modified compared to those of the isolated equations. The change in the self-energies is similar to that obtained in the presence of four-fermion interactions, but without their ad hoc inclusion in the theory. In...
In the forward end-cap of the Belle II spectrometer, an innovative proximity focusing Ring Imaging Cherenkov counter with a multilayer focusing aerogel radiator has been installed. The detector is designed to be operated in a B field of 1.5 T, and consists of a double layer aerogel radiator, an expansion volume and a photon detector. In total 420 Hamamatsu hybrid avalanche photo sensors with...
ATLAS electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential to record signals for a wide variety of physics: from Standard Model processes to searches for new phenomena in both proton-proton and heavy ion collisions. Main triggers used during Run 2 (2015-2018) for those physics studies were a single-electron trigger with ET threshold around 25 GeV...
During Run-2 the Large Hadron Collider (LHC) has provided, at the World's energy frontier, proton-proton collisions to the ATLAS experiment with high instantaneous luminosity (up to 2.1x10^34 cm-2s-1), placing stringent operational and physical requirements on the ATLAS trigger system in order to reduce the 40 MHz collision rate to a manageable event storage rate of 1 kHz, while not rejecting...
The ATLAS experiment aims at recording about 1 kHz of physics collisions, starting with an LHC design bunch crossing rate of 40 MHz. To reduce the significant background rate while maintaining a high selection efficiency for rare physics events (such as beyond the Standard Model physics), a two-level trigger system is used.
Events are selected based on physics signatures such as the...
The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of the ATLAS experiment. TileCal uses steel as absorber and plastic scintillators as active medium. The scintillators are read-out by the wavelength shifting fibres coupled to the photomultiplier tubes (PMTs). The analogue signals from the PMTs are amplified, shaped, digitized by sampling the signal...
The Jiangmen Underground Neutrino Observatory (JUNO) is a next generation multi-purpose antineutrino detector currently under construction in Jiangmen, in China, with the main goal to determine the neutrino mass hierarchy, as well as several neutrino mass and mixing parameters with a precision at the sub-percent level. The reactor electron antineutrinos of two power plants at a baseline of 53...
The proposed Compact Linear Collider (CLIC) will provide electron-positron collisions at centre-of-mass energies from a few hundred GeV up to 3 TeV. CLIC offers a rich precision physics program, and a high sensitivity to a wide range of possible new phenomena. The precision required for such measurements and the specific conditions imposed by the CLIC beam structure put strict requirements...
Precise calibration and monitoring of the CMS electromagnetic calorimeter (ECAL) is a key ingredient in achieving the excellent ECAL performance required by many physics analyses employing electrons, photons and jets. This poster describes the methods used to monitor and inter-calibrate the ECAL response, using physics channels such as W/Z boson decays to electrons, $\pi^0$ decays to photon...
The Compact Muon Solenoid (CMS) experiment implements a sophisticated two-level triggering system composed of the Level-1, instrumented by custom-design hardware boards, and a software High Level Trigger. A new Level-1 trigger architecture with improved performance is now being used to maintain high physics efficiency for the more challenging conditions experienced during Run II. We present...
The ICARUS T600 cryogenic detector is made of two identical modules for a total mass of ~ 760 tons of Liquid Argon, representing the biggest detector of this kind in operation. Each module is equipped with two readout chambers on the long sides, with planes of wires at $0^{\circ}, \pm 60^{\circ}$ for a total 0f 54000 readout wires. The LAr TPC's have been refurbished at CERN, in the framework...
The Data Quality Monitoring (DQM) Software is a central tool in the CMS experiment, used from the online monitoring of detector performance to the offline Data Certification for physics analysis. In this presentation, the current DQM Software, Structure and Workflow, and the Data Certification (DC) Procedure used for Run2 are described. Then, the performance and experiences with the DQM-DC...
In the high luminosity era of the Large Hadron Collider (HL-LHC), the instantaneous luminosity is expected to reach unprecedented values, resulting in about 200 proton-proton interactions in a typical bunch crossing. To cope with the resultant increase in occupancy, bandwidth and radiation damage, the ATLAS Inner Detector will be replaced by an all-silicon system, the Inner Tracker (ITk),...
The origin of neutrino oscillations is the coherent superposition of different neutrino states. The loss of coherence of neutrino states due to neutrino interactions with an external environment leads to damping of oscillations. The neutrino quantum decoherence is studied in the formalism of open quantum systems using a density matrix. In the framework of this approach, it is possible to...
The global feature extractor (gFEX) is a component of the Level-1 Calorimeter trigger Phase-I upgrade for the ATLAS experiment. It is intended to identify patterns of energy associated with the hadronic decays of high momentum Higgs, W, & Z bosons, top quarks, and exotic particles in real time at the LHC crossing rate. The single processor board is packaged in an Advanced Telecommunications...
The main physics goal of the MEGII experiment is to search for the ultra-rare muon decay into a photon and a positron (𝜇+ → 𝘦+ 𝛾), a sensitive tool for probing physics beyond standard model and exploring new energy scale (up few thousands TeV). The MEG experiment has set the best upper limit on the branching ratio B.R. of the 𝜇+ → 𝘦+ 𝛾 decay (B.R.(𝜇+ → 𝘦+ 𝛾) < 4.2 10-13 at 90% C.L.) and a...
The ATLAS collaboration at LHC has chosen the resistive Micromegas technology, along with the small-strip Thin Gap Chambers (sTGC), for the high luminosity upgrade of the first muon station in the high-rapidity region, the so called New Small Wheel (NSW) project. After the R&D, design and prototyping phase, the first series production Micromegas quadruplets are being constructed at the...
Electronics developments are pursued for the trigger readout of the ATLAS Liquid-Argon Calorimeter towards the Phase-I upgrade scheduled in the LHC shut-down period of 2019-2020. Trigger signals with higher spatial granularity and higher precision are needed in order to improve the identification efficiencies of electrons, photons, tau, jets and missing energy, at high background rejection...
ATLAS plans to replace the present barrel innermost station of Monitored Drift Tube (MDT) chambers with an integrated system of thin-gap Resistive Plate Chambers (RPC) and small diameter muon drift-tube (sMDT) chambers to improve the muon trigger efficiency in the barrel region. In addition, to cope with large amount of data and high event rate expected from the planned LHC upgrades, the...
The muon spectrometer of the ATLAS detector will undergo a major upgrade during the Long Shutdown 3, in order to cope with the operational conditions at the high-luminosity LHC. The trigger and readout electronics for the Resistive Plate Chambers (RPC), Thin Gap Chambers (TGC), and Monitored Drift Tube (MDT) chambers will be replaced to make them compatible with a new trigger scheme with...
In this talk, we discuss the inclusive production of hadrons in the framework of the CGC/saturation approach. We argue, that gluon jet inclusive production stems from the vicinity of the saturation momentum, even for small values of the transverse momenta $p_T$. Since in this region, we theoretically, know the scattering amplitude, we claim that we can provide reliable estimates for...
We show that three generations of leptons and quarks with unbroken Standard Model gauge symmetry $SU(3)_c\times U(1)_{em}$ can be described using the algebra of complexified sedenions $\mathbb{C}\otimes\mathbb{S}$. A primitive idempotent is constructed by selecting a special direction, and the action of this projector on the basis of $\mathbb{C}\otimes\mathbb{S}$ can be used to uniquely split...
The main goal of the MPD experiment at NICA in Dubna is to study hot and dense baryonic matter in ion-ion collisions at energies $\sqrt{S_{NN}}$ = 4-11 GeV. For a detailed study of the processes and registration of the slightest fluctuations occurring under these conditions, it is necessary to identify particles produced in interactions with high efficiency. The time-of-flight identification...
The next generation of collider detectors will most likely make full use of Particle Flow algorithms, requiring precision tracking and imaging calorimeters. The latter, with granularity 2 to 3 orders of magnitude above existing devices, have been developed during the last 15 years by the CALICE collaboration and are now approaching maturity. The state-of-the-art and the remaining challenges...
The High-Luminosity LHC will open an unprecedented window on the weak-scale nature of the universe, providing high-precision measurements of the Standard Model as well as searches for new physics beyond the standard model. The Compact Muon Solenoid (CMS) experiment is planning to replace entirely its trigger and data acquisition system to achieve this ambitious physics program. Efficiently...
We describe two natural scenarios in which both dark matter weakly interacting massive particles (WIMPs) and a variety of supersymmetric partners should be discovered in the foreseeable future. In the first scenario, the WIMPs are neutralinos, but they are only one component of the dark matter, which is dominantly composed of other relic particles such as axions. (This is the multicomponent...
Quenching of high-$p_T$ hadrons observed in AA collisions is controlled by color transparency, rather than by induced energy loss. This mechanism leads to universality of nuclear suppression, which is confirmed by data for light,
light-heavy mesons, heavy quarkonia and even high-pT protons. Nevertheless,for heavy flavored mesons energy loss turns out to be important, but not the one induced by...
The Large Hadron Collider (LHC) will be upgraded in several phases to significantly expand its physics program. After the current long shutdown from 2018-2020 (LS2) the accelerator luminosity will be increased to 2 − 3 * 10^34cm−2s−1 exceeding the design value of 1 * 10^34cm−2s−1 allowing the CMS experiment to collect approximately 100 fb−1/year. A subsequent upgrade in 2022-23 will increase...
The present CMS muon system consists of three different detector technologies: drift tubes (DT) and cathode strip chambers (CSC) are used in the barrel and end-cap regions of the spectrometer as offline tracking and triggering devices, whereas resistive plate chambers (RPC) are installed both in barrel and end-caps and are exploited mostly in the trigger. In order to cope with the challenging...
The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector with primary physics goal of neutrino mass hierarchy determination and other measurements, including precise neutrino oscillation parameters, solar neutrino, geo-neutrino, supernova neutrinos and the diffuse supernova neutrinos background. The detector will be built in 700m deep underground...
Some breakthroughs in charmed-baryon experiments, including singly charmed baryons and doubly charmed baryons, have been made in recent years. In this talk, I will introduce the new calculated branching fractions and spin asymmetry of typical two-body weak decays for both singly and doubly charmed baryons. Both factorizable and nonfactorizable contributions are incorporated in the study. For...
A liquid scintillator containing a tetrakis (isopropyl acetoacetato) zirconium (Zr(iPrac)$_{4}$) has been developed for new experiment of neutrinoless double beta decay (0$\nu\beta\beta$) search using $^{96}$Zr isotope. The liquid scintillator has 10wt.\% concentration of Zr(iPrac)$_{4}$, which corresponds to 1.4wt.% of natural zirconium, a light yield of $48.7 \pm 7.1$% for BC505, and an...
