A5074939986- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Cold Atom Physics and Bose-Einstein Condensates
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- Pulsars and Gravitational Waves Research
- Statistical Mechanics and Entropy
- Nuclear reactor physics and engineering
- Dust and Plasma Wave Phenomena
- High-pressure geophysics and materials
- Stochastic processes and statistical mechanics
- Ionosphere and magnetosphere dynamics
- Physics of Superconductivity and Magnetism
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Optical properties and cooling technologies in crystalline materials
- Atomic and Molecular Physics
- Advanced Thermodynamics and Statistical Mechanics
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Magnetic confinement fusion research
- Markov Chains and Monte Carlo Methods
A. Alikhanyan National Laboratory
2011-2024
Kurchatov Institute
2015-2024
Institute of High Energy Physics
2024
University of Antwerp
2024
National Research Nuclear University MEPhI
2014-2023
Kansas State University
2023
Petersburg Nuclear Physics Institute
2013-2022
Joint Institute for Nuclear Research
2017-2022
Dubna State University
2020-2021
European Organization for Nuclear Research
2012-2013
A three-fluid hydrodynamic model for simulating relativistic heavy-ion collisions is introduced. Along with two baryon-rich fluids, the new considers time-delayed evolution of a third, baryon-free (i.e., zero net baryonic charge) fluid newly produced particles. Its delayed because formation time \ensuremath{\tau}, during which neither thermalizes nor interacts fluids. After it starts to interact fluids and quickly gets thermalized. Within this pure hadronic equation state, systematic...
Recent STAR data for the directed flow of protons, antiprotons, and charged pions obtained within beam energy scan program are analyzed parton-hadron-string-dynamics (PHSD HSD) transport models a 3-fluid hydrodynamics approach. Both versions kinetic approach, HSD PHSD, used to clarify role partonic degrees freedom. The PHSD results, simulating phase its coexistence with hadronic one, roughly consistent data. hydrodynamic results two equations state (EoS), pure EoS an crossover type...
Global polarization of $\Lambda$ and $\bar{\Lambda}$ hyperons in Au+Au collisions at collision energies $\sqrt{s_{NN}}=$ 4-40 GeV the midrapidity region total polarization, i.e. averaged over all rapidities, are studied within scope thermodynamical approach. The relevant vorticity is simulated model three-fluid dynamics (3FD). It found that performed rough estimate global quite satisfactorily reproduces experimental STAR data on especially its collision-energy dependence. increases with...
Predictions are made for the global polarization of $\mathrm{\ensuremath{\Lambda}}$ hyperons in $\mathrm{Au}+\mathrm{Au}$ collisions at moderately relativistic collision energies, 2.4 $\ensuremath{\le}\sqrt{{s}_{NN}}\ensuremath{\le}$ 11 GeV. These based on thermodynamic approach to incorporated into model three-fluid dynamics. Centrality dependence is studied. It predicted that reaches a maximum or plateau (depending equation state and centrality) $\sqrt{{s}_{NN}}\ensuremath{\approx}$ 3...
Central collisions of gold nuclei are simulated by several existing models and the central net baryon density \ensuremath{\rho} energy \ensuremath{\varepsilon} extracted at successive times for beam kinetic energies 5--40 GeV/nucleon. The resulting trajectories in $(\ensuremath{\rho},\ensuremath{\varepsilon})$ phase plane discussed from perspective experimentally exploring expected first-order hadronization transition with planned FAIR GSI or a low-energy campaign Relativistic Heavy Ion Collider.
Analysis of directed flow ($v_1$) protons, antiprotons and pions in heavy-ion collisions is performed the range incident energies $\sqrt{s_{NN}}$ = 2.7--27 GeV. Simulations have been done within a three-fluid model employing purely hadronic equation state (EoS) two versions EoS involving deconfinement transitions: first-order phase transition smooth crossover transition. High sensitivity flow, especially proton one, to found. The favored by most part considered experimental data. A strong...
Strong correlation effects in classical and quantum plasmas are discussed. In particular, Coulomb (Wigner) crystallization phenomena reviewed focusing on one-component non-neutral traps macroscopic two-component neutral plasmas. The conditions for crystal formation terms of critical values the coupling parameters distance fluctuations phase diagram crystals
Simulations of relativistic heavy-ion collisions within the three-fluid model employing a purely hadronic equation state (EoS) and two versions EoS involving deconfinement transition are presented. The latter an with first-order phase that smooth crossover transition. setup is described in detail. analysis performed wide range incident energies 2.7 GeV $< \sqrt{s_{NN}} <$ 39 terms center-of-mass energy. Results on proton net-proton rapidity distributions reported. Comparison available data...
We present a new event generator based on the three-fluid hydrodynamics approach for early stage of collision, followed by particlization at hydrodynamic decoupling surface to join microscopic transport model, UrQMD, account hadronic final state interactions. first results nuclear collisions FAIR/NICA energy scan program (Au+Au collisions, $\sqrt{s_{NN}}=4-11$ GeV). address directed flow protons and pions as well proton rapidity distribution two model EoS, one with order phase transition...
Possible correlations of the global polarization $\mathrm{\ensuremath{\Lambda}}$ hyperons with angular momentum and transverse flow in central region colliding nuclei are studied based on a refined estimate polarization. Simulations $\mathrm{Au}+\mathrm{Au}$ collisions at collision energies $\sqrt{{s}_{NN}}=6--40\phantom{\rule{0.16em}{0ex}}\mathrm{GeV}$ performed within model three-fluid dynamics. Within crossover first-order-phase-transition scenarios this quite satisfactorily reproduces...
Kaon properties in pion medium are studied. The dense is produced high-energy heavy-ion collisions. consideration based on the chiral nucleon-kaon-pion Lagrangian. It found that does not produce a substantive contribution but enhances effect of baryon matter. Numerical estimate shows this enhancement factor induced by exceed 11\% at freeze-out stage collisions, i.e. it small. However, impact can be higher actual nuclear collisions because in-medium (anti)kaon modification accumulated during...
The nonequilibrium melting dynamics of finite two-dimensional dust clusters is investigated experimentally. Nonequilibrium induced by placing a single particle in the layer below actual cluster which leads to unstable oscillations lower particle. dynamic and thermodynamic properties during two-step process have been investigated. Using novel technique singular value decomposition, driving modes unambiguously related oscillation. These are not accessible normal mode analysis. Further it has...
Video microscopy is a widely applied diagnostic to investigate the structure and dynamics of particles in dusty plasmas. Reliable algorithms are required accurately recover particle positions from camera images. Here, four different positioning techniques have been tested on artificial experimental data plasma situations. Two methods that rely pixel-intensity thresholds were found be strongly affected by pixel-locking errors noise. other methods—one applying spatial bandpass filters fitting...
Vorticity of matter generated in noncentral heavy-ion collisions at energies the Nuclotron-based Ion Collider fAcility (NICA) Joint Institute for Nuclear Research (JINR) Dubna is studied. Simulations are performed within model three-fluid dynamics (3FD) which reproduces major part bulk observables these energies. Comparison with earlier calculations done. The qualitative pattern vorticity evolution analyzed. It demonstrated that mainly located border between participants and spectators. In...
Particle production in relativistic collisions of heavy nuclei is analyzed a wide range incident energies 2.7 GeV $\le \sqrt{s_{NN}}\le$ 62.4 GeV. The analysis performed within the three-fluid model employing three different equations state (EoS): purely hadronic EoS, an EoS with first-order phase transition and that smooth crossover transition. It found scenario fails to reproduce experimental yields antibaryons (strange nonstrange), starting already from lower SPS energies, i.e....
We present results of simulations light-nuclei production in $\mathrm{Au}+\mathrm{Au}$ collisions at a collision energy $\sqrt{{s}_{NN}}=3$ GeV within the updated Three-fluid Hydrodynamics-based Event Simulator Extended by UrQMD (ultrarelativistic quantum molecular dynamics) final State interactions (THESEUS). The are compared with recent STAR data. is treated thermodynamical approach on an equal basis hadrons. only additional parameter related to light nuclei density late freeze-out that...
Based on the quasiparticle model of quark-gluon plasma (QGP), a color quantum path-integral Monte-Carlo (PIMC) method for calculation thermodynamic properties and -- closely related to latter Wigner dynamics transport QGP are formulated. The partition function is presented in form path integral with new relativistic measure instead Gaussian one traditionally used Feynman-Wiener integral. It shown that PIMC able reproduce lattice QCD equation state at zero baryon chemical potential realistic...
Transverse-mass spectra, their inverse slopes, and mean transverse masses in relativistic collisions of heavy nuclei are analyzed a wide range incident energies, 2.7 GeV $\ensuremath{\le}\sqrt{{s}_{NN}}\ensuremath{\le}$ 39 GeV. The analysis is performed within the three-fluid model, employing three different equations state (EoS): purely hadronic EoS, an EoS with first-order phase transition, smooth crossover transition into deconfined state. Calculations show that slopes all species (with...
Vorticity generated in heavy-ion collisions at energy of $\sqrt{s_{NN}}=$ 39 GeV is studied. Simulations are performed within a model the three-fluid dynamics. A peculiar structure consisting two vortex rings found: one ring target fragmentation region and another projectile region. These also formed central collisions. The matter rotation opposite this rings. already early stage collision together with primordial regions. average vorticity, responsible for global polarization observed...