A5039353199- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Stochastic processes and statistical mechanics
- Statistical Methods and Bayesian Inference
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Pediatric Urology and Nephrology Studies
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Markov Chains and Monte Carlo Methods
- Radiation Detection and Scintillator Technologies
- Luminescence Properties of Advanced Materials
- Atmospheric and Environmental Gas Dynamics
- Magnetic confinement fusion research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Muon and positron interactions and applications
- Advanced X-ray and CT Imaging
- Particle Accelerators and Free-Electron Lasers
Kurchatov Institute
2016-2025
Moscow Engineering Physics Institute
2017-2025
University of Bergen
2023-2025
European Organization for Nuclear Research
2012-2025
A. Alikhanyan National Laboratory
2015-2024
University of Houston
2023-2024
Joint Institute for Nuclear Research
2024
Central China Normal University
2019-2023
Moscow Institute of Physics and Technology
2021-2023
PHENIX laboratory
2016-2023
We report the first measurement of charged particle elliptic flow in Pb-Pb collisions at sqrt[S(NN)] =2.76 TeV with ALICE detector CERN Large Hadron Collider. The is performed central pseudorapidity region (|η|<0.8) and transverse momentum range 0.2<p t<5.0 GeV/c. signal v₂, measured using 4-particle correlation method, averaged over 0.087 ± 0.002(stat) 0.003(syst) 40%-50% centrality class. differential v₂ p t reaches a maximum 0.2 near =3 Compared to RHIC Au-Au 200 GeV, increases by about...
The centrality dependence of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions sqrt[s_{NN}]=2.76 TeV is presented. normalized per participating nucleon pair increases by about a factor 2 from peripheral (70%-80%) to central (0%-5%) collisions. found be similar that observed lower collision energies. data are compared with models based on different mechanisms for particle production nuclear
In this paper measurements are presented of $\rm \pi$$^+$, \pi$$^-$, K$^+$, K$^-$, p and $\overline{\rm p}$ production at mid-rapidity < 0.5, in Pb-Pb collisions $\sqrt{s_{\rm NN}} = 2.76$ TeV as a function centrality. The measurement covers the transverse momentum ($p_{\rm T}$) range from 100, 200, 300 MeV/$c$ up to 3, 4.6 GeV/$c$, for $\rm\pi$, K, respectively. measured $p_{\rm T}$ distributions yields compared expectations based on hydrodynamic, thermal recombination models. spectral...
We report on the first measurement of triangular ${v}_{3}$, quadrangular ${v}_{4}$, and pentagonal ${v}_{5}$ charged particle flow in Pb-Pb collisions at $\sqrt{{s}_{\mathrm{NN}}}=2.76\text{ }\text{ }\mathrm{TeV}$ measured with ALICE detector CERN Large Hadron Collider. show that can be described terms initial spatial anisotropy its fluctuations, which provides strong constraints origin. In most central events, where elliptic ${v}_{2}$ ${v}_{3}$ have similar magnitude, a double peaked...
Inclusive transverse momentum spectra of primary charged particles in Pb–Pb collisions at sNN=2.76TeV have been measured by the ALICE Collaboration LHC. The data are presented for central and peripheral collisions, corresponding to 0–5% 70–80% hadronic cross section. particle |η|<0.8 0.3<pT<20GeV/c compared expectation pp same sNN, scaled number underlying nucleon–nucleon collisions. comparison is expressed terms nuclear modification factor RAA. result indicates only weak medium effects...
This publication describes the methods used to measure centrality of inelastic Pb-Pb collisions at a center-of-mass energy 2.76 TeV per colliding nucleon pair with ALICE. The is key parameter in study properties QCD matter extreme temperature and density, because it directly related initial overlap region nuclei. Geometrical collision, such as number participating nucleons binary nucleon-nucleon collisions, are deduced from Glauber model sharp impact selection shown be consistent those...
The first measurement of the charged-particle multiplicity density at midrapidity in Pb-Pb collisions a center-of-mass energy per nucleon pair $\sqrt{{s}_{NN}}=2.76\text{ }\text{ }\mathrm{TeV}$ is presented. For an event sample corresponding to most central 5% hadronic cross section, pseudorapidity primary charged particles $1584\ifmmode\pm\else\textpm\fi{}4(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}76(\mathrm{syst})$, which corresponds $8.3\ifmmode\pm\else\textpm\fi{}0.4(\mathrm{syst})$...
ALICE (A Large Ion Collider Experiment) is the LHC (Large Hadron Collider) experiment devoted to investigating strongly interacting matter created in nucleus-nucleus collisions at energies. The ITS, Inner Tracking System, consists of six cylindrical layers silicon detectors with three different technologies; outward direction: two pixel detectors, each drift, and strip detectors. number parameters be determined spatial alignment 2198 sensor modules ITS about 13,000. target precision well...
The first measurement of two-pion Bose-Einstein correlations in central Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV the Large Hadron Collider is presented. We observe a growing trend with energy now not only for longitudinal and outward but also sideward pion source radius. homogeneity volume decoupling time are significantly larger than those measured RHIC.
The PHENIX collaboration at the Relativistic Heavy Ion Collider (RHIC) reports measurements of azimuthal dihadron correlations near midrapidity in $d$$+$Au collisions $\sqrt{s_{_{NN}}}$=200 GeV. These complement recent analyses by experiments Large Hadron (LHC) involving central $p$$+$Pb $\sqrt{s_{_{NN}}}$=5.02 TeV, which have indicated strong anisotropic long-range angular distributions hadron pairs. origin these anisotropies is currently unknown. Various competing explanations include...
The ALICE experiment has measured the inclusive J/$\psi$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}} } = 2.76$ TeV down to zero transverse momentum rapidity range $2.5 < y 4$. A suppression of yield is observed with respect one pp scaled by number binary nucleon-nucleon collisions. nuclear modification factor, integrated over 0-80% most central collisions, $0.545 \pm 0.032 \rm{(stat.)} 0.083 \rm{(syst.)}$ and does not exhibit a significant dependence on collision centrality....
Angular correlations between unidentified charged trigger ($t$) and associated ($a$) particles are measured by the ALICE experiment in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV for transverse momenta $0.25 < p_{T}^{t,\, a} 15$ GeV/$c$, where $p_{T}^t > p_{T}^a$. The shapes of pair correlation distributions studied a variety collision centrality classes 0 50% total hadronic cross section pseudorapidity interval $|\eta| 1.0$. Distributions relative azimuth $\Delta\phi \equiv \phi^t -...
The elliptic, $v_2$, triangular, $v_3$, and quadrangular, $v_4$, azimuthal anisotropic flow coefficients are measured for unidentified charged particles, pions (anti-)protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV with the ALICE detector Large Hadron Collider. Results obtained event plane four-particle cumulant methods reported pseudo-rapidity range $|\eta|<0.8$ different collision centralities as a function of transverse momentum, $p_{\rm T}$, out to T}=20$ GeV/$c$. observed...
The production of the prompt charm mesons $D^0$, $D^+$, $D^{*+}$, and their antiparticles, was measured with ALICE detector in Pb-Pb collisions at LHC, a centre-of-mass energy $\sqrt{s_{NN}}=2.76$ TeV per nucleon--nucleon collision. $p_{\rm T}$-differential yields range $2<p_{\rm T}<16$ GeV/c central rapidity, $|y|<0.5$, were used to calculate nuclear modification factor $R_{AA}$ respect proton-proton reference obtained from cross section $\sqrt{s}=7$ scaled $\sqrt{s}=2.76$ TeV. For three...
A bstract The p t -differential inclusive production cross sections of the prompt charmed mesons D 0 , + and *+ in rapidity range | y < 0.5 were measured proton-proton collisions at $ \sqrt {s} = 7{ }TeV LHC using ALICE detector. Reconstructing decays → K − π their charge conjugates, about 8,400 2,900 2,600 with 1 24 GeV/ c counted, after selection cuts, a data sample 3.14 × 10 8 events collected minimum-bias trigger (integrated luminosity L int 5 nb −1 ). results are described within...
The production of mesons containing strange quarks (K$^0_s$, $\phi$) and both singly doubly baryons ($\Lambda$, Anti-$\Lambda$, $\Xi$+Anti-$\Xi$) are measured at central rapidity in pp collisions $\sqrt{s}$ = 0.9 TeV with the ALICE experiment LHC. results obtained from analysis about 250 k minimum bias events recorded 2009. Measurements yields (dN/dy) transverse momentum spectra rapidities for inelastic presented. For mesons, we report (<dN/dy>) 0.184 $\pm$ 0.002 stat. 0.006 syst. K$^0_s$...
The ALICE experiment at the LHC has studied inclusive J/$\psi$ production central and forward rapidities in pp collisions $\sqrt{s} = 7$ TeV. In this Letter, we report on first results obtained detecting through its dilepton decay into $e^+e^-$ $\mu^+\mu^-$ pairs rapidity range |y|<0.9 2.5<y<4, respectively, with acceptance down to zero $p_{\rm T}$. dielectron channel analysis was carried out a data sample corresponding an integrated luminosity $L_{\rm int}$ 5.6 nb$^{-1}$ number of signal...
We present azimuthal angular correlations between charged hadrons and energy deposited in calorimeter towers central d+Au minimum bias p+p collisions at √sNN=200 GeV. The hadron is measured midrapidity |η|<0.35, the large rapidity (−3.7<η<−3.1, Au-going direction). An enhanced near-side correlation across |Δη|>2.75 observed collisions. Using event plane method applied to distribution, we extract anisotropy strength v2 for inclusive up pT=4.5 GeV/c. also measurement of identified π±...
The first measurements of the invariant differential cross sections inclusive π0 and η meson production at mid-rapidity in proton–proton collisions s=0.9TeV s=7TeV are reported. measurement covers ranges 0.4<pT<7GeV/c 0.3<pT<25GeV/c for these two energies, respectively. mesons was measured range 0.4<pT<15 GeV/c. Next-to-Leading Order perturbative QCD calculations, which consistent with spectrum s=0.9TeV, overestimate those s=7TeV, but agree η/π0 ratio s=7TeV.
We present the first measurement of elliptic (v2) and triangular (v3) flow in high-multiplicity 3He+Au collisions at √sNN=200 GeV. Two-particle correlations, where particles have a large separation pseudorapidity, are compared p+p indicate that collective effects dominate second third Fourier components for correlations observed system. The behavior is quantified terms v2 v3 anisotropy coefficients measured with respect to their corresponding event planes. values comparable those previously...
Direct photons produced in relativistic heavy-ion collisions allow access to the state of matter during collision, because they do not experience strong interaction and can escape from fireball without scattering. New data PHENIX experiment at RHIC show that as a function impact parameter yield direct increases much more rapidly than particle production, which provides new evidence for emission system when it was most hot dense.
The transverse momentum (${p}_{T}$) spectra and ratios of identified charged hadrons (${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, $\overline{p}$) produced in $\sqrt{{s}_{{}_{NN}}}=200$ GeV $\mathrm{Au}+\mathrm{Au}$ $d+\text{Au}$ collisions are reported five different centrality classes for each collision species. measurements pions protons up to ${p}_{T}=6$ GeV/$c$ (5 GeV/$c$), the kaons ${p}_{T}=4$ (3.5 GeV/$c$) ($d+\text{Au}$) collisions....
We have studied J/psi production in pp collisions at $\sqrt{s}=7$ TeV the LHC through its muon pair decay. The polar and azimuthal angle distributions of decay muons were measured, results on J/$\psi$ polarization parameters $\lambda_{\theta}$ $\lambda_\phi$ obtained. study was performed kinematic region 2.5<y<4, 2<$p_{\rm T}$<8 GeV/$c$, helicity Collins-Soper reference frames. In both frames, are compatible with zero, within uncertainties.