V. Belyaev
A5070029333- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Diamond and Carbon-based Materials Research
- Nuclear reactor physics and engineering
- Advanced Chemical Physics Studies
- Dark Matter and Cosmic Phenomena
- Radiation Effects in Electronics
- Spectroscopy and Laser Applications
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Advanced Radiotherapy Techniques
- Superconducting Materials and Applications
- Muon and positron interactions and applications
- Geotechnical and Geomechanical Engineering
- Advanced X-ray and CT Imaging
- Engineering and Environmental Studies
- Crop Yield and Soil Fertility
- Mining and Gasification Technologies
- Radiation Therapy and Dosimetry
- Statistical Methods and Bayesian Inference
- Combustion and Detonation Processes
National Research Nuclear University MEPhI
2014-2024
European Organization for Nuclear Research
2023-2024
University of Houston
2023-2024
University of Oslo
2023
A. Alikhanyan National Laboratory
2014-2023
Max Planck Institute for Physics
2023
Ural Branch of the Russian Academy of Sciences
2023
Institute of Economics
2023
Institute of Engineering Physics
2000-2022
Kurchatov Institute
2015-2022
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...
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...
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)....
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...
The ALICE Collaboration reports unique data on particle production in Pb-Pb and inelastic $p$-$p$ collisions at the LHC 5.02 TeV. measurements range from very peripheral to most central collisions, cover particles with transverse momenta hundreds of MeV/$c$ 20 GeV/$c$. precision breadth provide tight constraints our understanding mechanisms these collisions.
The production of the hypertriton nuclei $^{3}_{\Lambda}\mathrm H$ and $^{3}_{\bar{\Lambda}} \overline{\mathrm H}$ has been measured for first time in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV with ALICE experiment LHC energies. total yield, d$N$/d$y$ $\times \mathrm{B.R.}_{\left( ^{3}_{\Lambda}\mathrm H \rightarrow ^{3}\mathrm{He},\pi^{-} \right)} \left( 3.86 \pm 0.77 (\mathrm{stat.}) 0.68 (\mathrm{syst.})\right) \times 10^{-5}$ 0-10% most central collisions, is consistent...
Comprehensive results on the production of unidentified charged particles, ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}, {\mathrm{K}}^{\ifmmode\pm\else\textpm\fi{}}, {\mathrm{K}}_{\mathrm{S}}^{0}, {\mathrm{K}}^{*}{(892)}^{0}, p, \overline{p}, \ensuremath{\phi}$(1020), $\mathrm{\ensuremath{\Lambda}}, \overline{\mathrm{\ensuremath{\Lambda}}}, {\mathrm{\ensuremath{\Xi}}}^{\ensuremath{-}}, {\overline{\mathrm{\ensuremath{\Xi}}}}^{+}, {\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}$, and...
Abstract One of the key challenges for nuclear physics today is to understand from first principles effective interaction between hadrons with different quark content. First successes have been achieved using techniques that solve dynamics quarks and gluons on discrete space-time lattices 1,2 . Experimentally, strong studied by scattering off each other. Such experiments are difficult or impossible unstable 3–6 so high-quality measurements exist only containing up down 7 Here we demonstrate...
Abstract The ALICE experiment was proposed in 1993, to study strongly-interacting matter at extreme energy densities and temperatures. This proposal entailed a comprehensive investigation of nuclear collisions the LHC. Its physics programme initially focused on determination properties quark–gluon plasma (QGP), deconfined state quarks gluons, created such collisions. has been extended cover broader ensemble observables related Quantum Chromodynamics (QCD), theory strong interactions. studied...
The elliptic flow coefficient (v 2) of identified particles in Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=2.76 TeV was measured with the ALICE detector Large Hadron Collider (LHC). results were obtained Scalar Product method, a two-particle correlation technique, using pseudo-rapidity gap |Δη| > 0.9 between hadron under study and reference particles. v 2 is reported for π ±, K±, K S 0 , \mathrm{p}+\overline{\mathrm{p}} ϕ, \Lambda +\overline{\Lambda} {\Xi}^{-}+{\overline{\Xi}}^{+}...
The measurement of primary $$\pi ^{\pm }$$ , $$K^{\pm $$p$$ and $${\overline{{p}}}$$ production at mid-rapidity ( $$|y| <$$ 0.5) in proton–proton collisions $$\sqrt{s}$$ $$=$$ 7 TeV performed with a large ion collider experiment the hadron (LHC) is reported. Particle identification using specific ionisation energy-loss time-of-flight information, ring-imaging Cherenkov technique kink-topology weak decays charged kaons. Transverse momentum spectra are measured from 0.1 up to 3 GeV/ $$c$$ for...
We report the measurements of correlations between event-by-event fluctuations amplitudes anisotropic flow harmonics in nucleus-nucleus collisions, obtained for first time using a new analysis method based on multiparticle cumulants mixed harmonics. This novel is robust against systematic biases originating from nonflow effects and by construction any dependence symmetry planes eliminated. demonstrate that exhibit better sensitivity to medium properties than individual The are performed...
The multi-strange baryon yields in PbPb collisions have been shown to exhibit an enhancement relative pp reactions. In this work, Ξ and Ω production rates measured with the ALICE experiment as a function of transverse momentum, pT, pPb at centre-of-mass energy sNN=5.02 TeV. results cover kinematic ranges 0.6 GeV/c<pT<7.2 GeV/c 0.8 GeV/c<pT<5 GeV/c, for respectively, common rapidity interval −0.5<yCMS<0. Multi-strange baryons identified by reconstructing their weak decays into charged...
The transverse momentum (p T ) spectrum and nuclear modification factor (R AA of reconstructed jets in 0-10% 10-30% central Pb-Pb collisions at √ s NN = 2.76 TeV were measured.Jets using the anti-k jet algorithm with a resolution parameter R 0.2 from charged neutral particles, utilizing ALICE tracking detectors Electromagnetic Calorimeter (EMCal).The p spectra are reported pseudorapidity interval |η | < 0.5 for 40 T, 120 GeV/c 30 100 collisions.Reconstructed required to contain leading...
The production of prompt charmed mesons D0, D+ and D∗+, their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at centre-of-mass energy per nucleon pair, $$ \sqrt{s_{\mathrm{NN}}} , 2.76 TeV. yields for rapidity |y| < 0.5 are presented as a function transverse momentum, p T, interval 1–36 GeV/c centrality class 0–10% 1–16 30–50%. nuclear modification factor R AA computed using proton-proton reference \sqrt{s}=2.76 TeV, based on measurements \sqrt{s}=7 TeV theoretical...
The production of charged pions, kaons and (anti)protons has been measured at mid-rapidity ($-0.5 < y 0$) in p-Pb collisions $\sqrt{s_{\rm NN}}=5.02$ TeV using the ALICE detector LHC. Exploiting particle identification capabilities high transverse momentum ($p_{\rm T}$), previously published $p_{\rm T}$ spectra have extended to include measurements up 20 GeV/$c$ for seven event multiplicity classes. pp $\sqrt{s}=7$ TeV, needed interpolate a reference spectrum, also measure nuclear...
The ALICE Collaboration at the LHC has measured detailed properties of distribution prompt charmed mesons produced in Pb-Pb collisions. These are during very early stages results provide crucial information to determine most important physical processes for theoretical models.
We present the first measurement at LHC of exclusive J/$\psi$ photoproduction off protons, in ultra-peripheral proton-lead collisions $\sqrt{s_{\rm NN}}=5.02$ TeV. Events are selected with a dimuon pair produced either rapidity interval, laboratory frame, $2.5<y<4$ (p-Pb) or $-3.6<y<-2.6$ (Pb--p), and no other particles observed ALICE acceptance. The measured cross sections $\sigma (\gamma + {\rm p} \rightarrow J/\psi p})$ 33.2 $\pm$ 2.2 (stat) 3.1 (syst) 0.7 (theo) nb p-Pb 284 36...
Transverse momentum $({p}_{\mathrm{T}})$ spectra of pions, kaons, and protons up to ${p}_{\mathrm{T}}=20\phantom{\rule{0.28em}{0ex}}\text{GeV}/c$ have been measured in Pb-Pb collisions at $\sqrt{{s}_{\mathit{NN}}}=2.76\phantom{\rule{0.28em}{0ex}}\text{TeV}$ using the ALICE detector for six different centrality classes covering 0%--80%. The proton-to-pion kaon-to-pion ratios both show a distinct peak ${p}_{\mathrm{T}}\ensuremath{\approx}3\phantom{\rule{0.28em}{0ex}}\text{GeV}/c$ central that...
The pseudorapidity ($η$) and transverse-momentum ($p_{\rm T}$) distributions of charged particles produced in proton-proton collisions are measured at the centre-of-mass energy $\sqrt{s}$ = 13 TeV. distribution $|η|
We report on the first measurement of an excess in yield $J/\ensuremath{\psi}$ at very low transverse momentum (${p}_{T}<0.3\text{ }\text{ }\mathrm{GeV}/c$) peripheral hadronic Pb-Pb collisions $\sqrt{{s}_{\mathrm{NN}}}=2.76\text{ }\mathrm{TeV}$, performed by ALICE CERN LHC. Remarkably, measured nuclear modification factor rapidity range $2.5<y<4$ reaches about 7 (2) ${p}_{T}$ $0--0.3\text{ }\mathrm{GeV}/c$ 70%--90% (50%--70%) centrality class. The production cross section associated with...
The azimuthal anisotropy coefficient ${v}_{2}$ of prompt ${D}^{0}$, ${D}^{+}$, ${D}^{*+}$, and ${D}_{s}^{+}$ mesons was measured in midcentral (30%--50% centrality class) Pb-Pb collisions at a center-of-mass energy per nucleon pair $\sqrt{{s}_{NN}}=5.02\text{ }\text{ }\mathrm{TeV}$, with the ALICE detector LHC. $D$ were reconstructed via their hadronic decays midrapidity, $|y|<0.8$, transverse momentum interval $1<{p}_{T}<24\text{ }\mathrm{GeV}/c$. $D$-meson has similar values as that...
The production cross sections for prompt charmed mesons $$\mathrm{D^0}$$ , $$\mathrm{D^+}$$ $$\mathrm{D^{*+}}$$ and $$\mathrm{D_s^+}$$ were measured at mid-rapidity in proton–proton collisions a centre-of-mass energy $$\sqrt{s}=7~{\mathrm {TeV}}$$ with the ALICE detector Large Hadron Collider (LHC). D reconstructed from their decays $$\mathrm{D}^0 \rightarrow \mathrm{K}^-\pi ^+$$ $$\mathrm{D}^+\rightarrow ^+\pi $$\mathrm{D}^{*+} \mathrm{D}^0 \pi $$\mathrm{D_s^{+}\rightarrow \phi...
The production of K$^{*}(892)^{0}$ and $\phi(1020)$ mesons in proton-proton (pp) lead-lead (Pb-Pb) collisions at $\sqrt{s_\mathrm{NN}} =$ 2.76 TeV has been analyzed using a high luminosity data sample accumulated 2011 with the ALICE detector Large Hadron Collider (LHC). Transverse momentum ($p_{\mathrm{T}}$) spectra have measured for via their hadronic decay channels $p_{\mathrm{T}}$ up to 20 GeV/$c$. measurements pp compared model calculations used determine nuclear modification factor...