D. Berényi
A5068968800- 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
- Laser-Plasma Interactions and Diagnostics
- Atomic and Molecular Physics
- Pulsars and Gravitational Waves Research
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Parallel Computing and Optimization Techniques
- Magnetic confinement fusion research
- Cosmology and Gravitation Theories
- Fusion materials and technologies
- Scientific Computing and Data Management
- Quantum, superfluid, helium dynamics
- Metal Extraction and Bioleaching
- Cold Atom Physics and Bose-Einstein Condensates
- Dermatological and Skeletal Disorders
- Scientific Measurement and Uncertainty Evaluation
- Superconducting Materials and Applications
- High-pressure geophysics and materials
- Interconnection Networks and Systems
- Laser-induced spectroscopy and plasma
- Advanced Data Storage Technologies
A. Alikhanyan National Laboratory
2014-2022
Central China Normal University
2019-2022
HUN-REN Wigner Research Centre for Physics
2013-2021
Hungarian Academy of Sciences
1967-2020
Purdue University West Lafayette
2020
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2012-2018
Institute for Particle and Nuclear Physics
2011-2018
University of Birmingham
2015-2016
Eötvös Loránd University
2011-2015
COMSATS University Islamabad
2014
ALICE is the heavy-ion experiment at CERN Large Hadron Collider. The continuously took data during first physics campaign of machine from fall 2009 until early 2013, using proton and lead-ion beams. In this paper we describe running environment handling procedures, discuss performance detectors analysis methods for various observables.
Angular correlations between charged trigger and associated particles are measured by the ALICE detector in p–Pb collisions at a nucleon–nucleon centre-of-mass energy of 5.02 TeV for transverse momentum ranges within 0.5<pT,assoc<pT,trig<4GeV/c. The over two units pseudorapidity full azimuthal angle different intervals event multiplicity, expressed as yield per particle. Two long-range ridge-like structures, one on near side away side, observed when per-trigger obtained low-multiplicity...
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...
At sufficiently high temperature and energy density, nuclear matter undergoes a transition to phase in which quarks gluons are not confined: the Quark-Gluon Plasma (QGP) [1]. Such an extreme state of strongly-interacting QCD (Quantum Chromo-Dynamics) is produced laboratory with high-energy collisions heavy nuclei, where enhanced production strange hadrons observed [2-6]. Strangeness enhancement, originally proposed as signature QGP formation [7], more pronounced for multi-strange baryons....
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 inclusive transverse momentum ($p_{\rm T}$) distributions of primary charged particles are measured in the pseudo-rapidity range $|\eta|<0.8$ as a function event centrality Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}=2.76$ TeV with ALICE LHC. data presented $p_{\rm T}$ $0.15<p_{\rm T}<50$ GeV/$c$ for nine intervals from 70-80% to 0-5%. spectra terms nuclear modification factor $R_{\rm{AA}}$ using pp reference spectrum same collision energy. We observe that suppression high-$p_{\rm strongly...
The ALICE measurement of K(S)(0) and Λ production at midrapidity in Pb-Pb collisions √(s(NN))=2.76 TeV is presented. transverse momentum (p(T)) spectra are shown for several collision centrality intervals the p(T) range from 0.4 GeV/c (0.6 Λ) to 12 GeV/c. dependence Λ/K(S)(0) ratios exhibits maxima vicinity 3 GeV/c, positions shift towards higher with increasing centrality. magnitude these increases by almost a factor three between most peripheral central collisions. This baryon excess...
Angular correlations between unidentified charged trigger particles and various species of associated (unidentified particles, pions, kaons, protons antiprotons) are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy 5.02 TeV transverse-momentum range $0.3 < p_{\rm T} 4$ GeV/$c$. The expressed as yield per particle obtained pseudorapidity $|\eta_{\rm lab}|<0.8$. Fourier coefficients extracted from long-range projected onto azimuthal angle difference...
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....
The production of ${\rm\Xi}^-$ and ${\rm\Omega}^-$ baryons their anti-particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV has been measured using the ALICE detector. transverse momentum spectra mid-rapidity ($|y| < 0.5$) for charged $\rm\Xi$ $\rm\Omega$ hyperons have studied range $0.6 p_{\rm T} 8.0$ GeV/$c$ $1.2 7.0$ GeV/$c$, respectively, several centrality intervals (from most central 0-10% to peripheral 60-80% collisions). These compared with predictions recent hydrodynamic...
Measurements of charge-dependent azimuthal correlations with the ALICE detector at LHC are reported for Pb-Pb collisions $\sqrt{{s}_{NN}}=2.76\text{ }\text{ }\mathrm{TeV}$. Two- and three-particle in pseudorapidity range $|\ensuremath{\eta}|<0.8$ presented as a function collision centrality, particle separation pseudorapidity, transverse momentum. A clear signal compatible relative to reaction plane is observed, which shows little or no energy dependence when compared measurements RHIC...
The ALICE Collaboration at the LHC has measured J/ψ and ψ′ photoproduction mid-rapidity in ultra-peripheral Pb–Pb collisions $\sqrt{s_{\mathrm{NN}}}=2.76~\mathrm{TeV}$ . charmonium is identified via its leptonic decay for events where hadronic activity required to be minimal. analysis based on an event sample corresponding integrated luminosity of about 23 μb−1. cross section coherent incoherent production rapidity interval −0.9<y<0.9, are...
The pseudorapidity density of charged particles ($\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$) at mid-rapidity in Pb-Pb collisions has been measured a center-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}}$ = 5.02 TeV. It increases with centrality and reaches value $1943 \pm 54$ $|\eta|<0.5$ for the 5% most central collisions. A rise $\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$ as function is observed, steeper than that observed proton-proton following trend established by measurements lower...
Transverse momentum spectra of $π^{\pm}$, $\rm K^{\pm}$ and p($\bar{\rm p}$) up to $p_{\rm T}$ = 20 GeV/$c$ at mid-rapidity in pp Pb-Pb collisions $\sqrt{s_{\rm NN}}=$ 2.76 TeV have been measured using the ALICE detector Large Hadron Collider. The proton-to-pion kaon-to-pion ratios both show a distinct peak T} \approx 3 GeV/c$ central collisions. Below peak, < GeV/$c$, are good agreement with hydrodynamical calculations, suggesting that itself is dominantly result radial flow rather than...
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 -...
Direct photon production at mid-rapidity in Pb-Pb collisions $\sqrt{s_{_{\mathrm{NN}}}} = 2.76$ TeV was studied the transverse momentum range $0.9 < p_\mathrm{T} 14$ GeV$/c$. Photons were detected with highly segmented electromagnetic calorimeter PHOS and via conversions ALICE detector material $e^+e^-$ pair reconstructed central tracking system. The results of two methods combined direct spectra measured for 0-20%, 20-40%, 40-80% centrality classes. For all three classes, agreement found...
The inclusive J/ψ nuclear modification factor (RAA) in Pb–Pb collisions at sNN=2.76TeV has been measured by ALICE as a function of centrality the e+e− decay channel mid-rapidity (|y|<0.8) and centrality, transverse momentum rapidity μ+μ− forward-rapidity (2.5<y<4). yields are suppressed compared to those pp scaled number binary collisions. RAA integrated over range corresponding 90% inelastic cross section is 0.72±0.06(stat.)±0.10(syst.) 0.58±0.01(stat.)±0.09(syst.) forward-rapidity. At low...
The ALICE Collaboration has made the first measurement at LHC of J/ψ photoproduction in ultra-peripheral Pb–Pb collisions sNN=2.76TeV. is identified via its dimuon decay forward rapidity region with muon spectrometer for events where hadronic activity required to be minimal. analysis based on an event sample corresponding integrated luminosity about 55 μb−1. cross section coherent production interval −3.6<y<−2.6 measured dσJ/ψcoh/dy=1.00±0.18(stat)−0.26+0.24(syst)mb. result compared...
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 yields of the K*(892)$^{0}$ and $\Phi$(1020) resonances are measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV through their hadronic decays using ALICE detector. measurements performed multiple centrality intervals mid-rapidity (|$y$|<0.5) transverse-momentum ranges 0.3 < $p_{\rm T}$ 5 GeV/$c$ for 0.5 $\Phi$(1020). suppressed central with respect to pp peripheral (perhaps due rescattering its decay products medium), while longer lived meson is not suppressed. These particles...
The transverse momentum (${p}_{T}$) distribution of primary charged particles is measured in minimum bias (non-single-diffractive) $p+\mathrm{Pb}$ collisions at $\sqrt{{s}_{NN}}=5.02\text{ }\text{ }\mathrm{TeV}$ with the ALICE detector LHC. ${p}_{T}$ spectra near central rapidity range $0.5<{p}_{T}<20\text{ }\mathrm{GeV}/c$ exhibit a weak pseudorapidity dependence. nuclear modification factor ${R}_{p\mathrm{Pb}}$ consistent unity for above $2\text{ }\mathrm{GeV}/c$. This measurement...
We report measurements of the primary charged-particle pseudorapidity density and transverse momentum distributions in $p\ensuremath{-}\mathrm{Pb}$ collisions at $\sqrt{{s}_{\mathit{NN}}}=5.02\phantom{\rule{0.28em}{0ex}}\mathrm{TeV}$ investigate their correlation with experimental observables sensitive to centrality collision. Centrality classes are defined by using different event-activity estimators, i.e., multiplicities measured three regions as well energy beam rapidity (zero degree)....
Azimuthally anisotropic distributions of D$^0$, D$^+$ and D$^{*+}$ mesons were studied in the central rapidity region ($|y|<0.8$) Pb-Pb collisions at a centre-of-mass energy $\sqrt{s_{\rm NN}} = 2.76$ TeV per nucleon-nucleon collision, with ALICE detector LHC. The second Fourier coefficient $v_2$ (commonly denoted elliptic flow) was measured centrality class 30-50% as function D meson transverse momentum $p_{\rm T}$, range 2-16 GeV/$c$. is comparable magnitude to that light-flavour hadrons....
We report the first results of elliptic ($v_2$), triangular ($v_3$) and quadrangular flow ($v_4$) charged particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV with ALICE detector CERN Large Hadron Collider. The measurements are performed central pseudorapidity region $|\eta|<0.8$ for transverse momentum range $0.2<p_{\rm T}<5$ GeV/$c$. anisotropic is measured using two-particle correlations a gap greater than one unit multi-particle cumulant method. Compared to from NN}}=2.76$ TeV,...
Measurements of multiparticle azimuthal correlations (cumulants) for charged particles in $p$-Pb at $\sqrt{{s}_{\mathrm{NN}}}=5.02$ TeV and Pb-Pb $\sqrt{{s}_{\mathrm{NN}}}=2.76$ collisions are presented. They help address the question whether there is evidence global, flowlike, system. Comparisons made to measurements from larger system, where such established. In particular, second harmonic two-particle cumulants found decrease with multiplicity, characteristic a dominance few-particle...