I. Selyuzhenkov
A5005389030- 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
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Stochastic processes and statistical mechanics
- Superconducting Materials and Applications
- Gas Dynamics and Kinetic Theory
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Theoretical and Computational Physics
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Black Holes and Theoretical Physics
- Pulsars and Gravitational Waves Research
- Magnetic confinement fusion research
- X-ray Spectroscopy and Fluorescence Analysis
- Statistical Methods and Bayesian Inference
- Solar and Space Plasma Dynamics
- Pediatric Urology and Nephrology Studies
- Appendicitis Diagnosis and Management
- Scientific Research and Discoveries
- Geochemistry and Geologic Mapping
GSI Helmholtz Centre for Heavy Ion Research
2016-2025
A. Alikhanyan National Laboratory
2018-2024
European Organization for Nuclear Research
2023-2024
Aligarh Muslim University
2022-2023
University of Houston
2023
Goethe University Frankfurt
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2023
Moscow Engineering Physics Institute
2017-2022
Institute of Engineering Physics
2018-2022
Slovak Academy of Sciences
2019-2021
We present an analysis of proton number fluctuations in $\sqrt{s_{NN}}$ = 2.4 GeV Au+Au collisions measured with the High-Acceptance DiElectron Spectrometer (HADES) at GSI. With help extensive detector simulations done IQMD transport model events including nuclear clusters, various nuisance effects influencing observed cumulants have been investigated. Acceptance and efficiency corrections applied as a function fine grained rapidity transverse momentum bins, well considering local track...
This report summarizes the presentations and discussions during Rapid Reaction Task Force "Dynamics of critical fluctuations: Theory – phenomenology heavy-ion collisions", which was organized by ExtreMe Matter Institute EMMI held at GSI, Darmstadt, Germany in April 2019. We address current understanding dynamics fluctuations QCD their measurement collision experiments. In addition, we outline what might be learned from studying correlations other physical systems, such as cold atomic gases.
The applicability of anisotropic flow measurement techniques and their extension for detectors with nonuniform azimuthal acceptance are discussed. Considering measurements two three (mixed harmonic) correlations we introduce a set observables based on the $x$ $y$ components event vector. These provide independent measures can be used to test self-consistency analysis. Based these propose technique that explicitly takes into account effects detector acceptance. Within this approach...
Abstract High-precision measurements of flow coefficients $$v_{n}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>v</mml:mi> <mml:mi>n</mml:mi> </mml:msub> </mml:math> ( $$n = 1 - 4$$ <mml:mrow> <mml:mo>=</mml:mo> <mml:mn>1</mml:mn> <mml:mo>-</mml:mo> <mml:mn>4</mml:mn> </mml:mrow> ) for protons, deuterons and tritons relative to the first-order spectator plane have been performed in Au+Au collisions at $$\sqrt{s_{_{{\text {NN}}}}}= 2.4$$ <mml:msqrt>...
Transverse momentum spectra of identified particles produced in heavy-ion collisions at the Large Hadron Collider are described with relativistic fluid dynamics. We perform a systematic comparison experimental data for pions, kaons and protons up to transverse 3 GeV/c calculations using FluiduM code package solve evolution equations dynamics, TrENTo model describe initial state FastReso take resonance decays into account. Using five centrality classes center-of-mass collision energy per...
We present first data on sub-threshold production of K0 s mesons and Λ hyperons in Au+Au collisions at $\sqrt{s_{NN}}$ = 2.4 GeV. observe an universal scaling hadrons containing strangeness, independent their corresponding thresholds. Comparing the yields, scaling, shapes rapidity pt spectra to state-of-the-art transport model (UrQMD, HSD, IQMD) predictions, we find that none latter can simultaneously describe all observables with reasonable \c{hi}2 values.
Two-particle azimuthal correlations have been measured in neutral current deep inelastic ep scattering with virtuality Q2> 5 GeV2 at a centre-of-mass energy $$ \sqrt{s} = 318 GeV recorded the ZEUS detector HERA. The of charged particles range laboratory pseudorapidity −1.5 < η 2.0 and transverse momentum 0.1 pT< 5.0 event multiplicities Nch up to six times larger than average 〈Nch〉 ≈ 5. two-particle terms angular observables cn{2} 〈〈cosnΔφ〉〉, where n is between 1 4 ∆φ relative angle two...
A fluid-dynamic approach to the diffusion of heavy quarks in quark-gluon plasma (QGP) is presented. Specifically, we analyze Fokker-Planck equation for momentum transport from a fluid perspective and use mapping second-order dynamics determine conductivities relaxation times governing their spatial diffusion. By investigating relation between two approaches, provide new insights concerning level local thermalization charm bottom inside expanding QGP. Our results indicate that description...
Abstract A new measurement of inclusive-jet cross sections in the Breit frame neutral current deep inelastic scattering using ZEUS detector at HERA collider is presented. The data were taken years 2004–2007 a centre-of-mass energy $$318\,\,\textrm{GeV}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>318</mml:mn> <mml:mspace/> <mml:mtext>GeV</mml:mtext> </mml:mrow> </mml:math> and correspond to an integrated luminosity $$347\,\,\textrm{pb}^{-1}$$...
Recent results of the anisotropic flow measurements by ALICE Collaboration at LHC are reviewed. Directed, elliptic, triangular, and quadrangular presented differentially vs transverse momentum, pseudo-rapidity, collision centrality for charged identified particles. Experimental probes local parity violation using charge dependent azimuthal correlations with respect to reaction plane also discussed.
The size and evolution of the medium created in a heavy-ion collision depends on geometry. Experimentally collisions can be characterized by measured particle multiplicities around midrapidity or energy forward rapidity region, which is sensitive to spectator fragments. In Compressed Baryonic Matter (CBM) experiment at future Facility for Antiproton Ion Research (FAIR) multiplicity produced particles with silicon tracking system (STS). projectile detector (PSD) measures We present procedure...
High-statistics $\pi^-\pi^-$ and $\pi^+\pi^+$ femtoscopy data are presented for Au+Au collisions at $\sqrt{s_\mathrm{NN}}=2.4$ GeV, measured with HADES SIS18/GSI. The experimental correlation functions allow the determination of space-time extent corresponding emission sources via a comparison to models. source, parametrized as three-dimensional Gaussian distribution, is studied in dependence on pair transverse momentum, azimuthal angle respect reaction plane, collision centrality beam...
This report summarizes the presentations and discussions during Rapid Reaction Task Force "Dynamics of critical fluctuations: Theory -- phenomenology heavy-ion collisions", which was organized by ExtreMe Matter Institute EMMI held at GSI, Darmstadt, Germany in April 2019. We address current understanding dynamics fluctuations QCD their measurement collision experiments. In addition, we outline what might be learned from studying correlations other physical systems, such as cold atomic gases.
Charged particle directed flow at midrapidity, |eta|<0.8, and forward rapidity, 1.7 < |eta|<5.1, is measured in Pb-Pb collisions sqrt{s_NN} = 2.76 TeV with ALICE the LHC. Directed reported as a function of collision centrality, charged transverse momentum, pseudo-rapidity. Results are compared to measurements RHIC recent model calculations for LHC energies.
High-precision HERA data corresponding to a luminosity of around $1\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ have been used in the framework $eeqq$ contact interactions (CI) set limits on possible high-energy contributions beyond Standard Model electron-quark scattering. Measurements inclusive deep inelastic cross sections neutral and charged current $ep$ scattering were considered. The analysis has based simultaneous fits parton distribution functions including CI couplings Several...
We investigate identical pion HBT intensity interferometry in central Au + collisions at 1.23A GeV. High-statistics π−π− and π+π+ data are measured with HADES SIS18/GSI. The radius parameters, derived from the correlation function depending on relative momenta longitudinally comoving system parametrized as three-dimensional Gaussian distribution, studied of transverse momentum. A substantial charge-sign difference source radii is found, particularly pronounced low extracted parameters agree...
At large values of $x$, the parton distribution functions (PDFs) proton are poorly constrained and there considerable variations between different global fits. Data at such high $x$ have already been published by ZEUS Collaboration, but not yet used in PDF extractions. A technique for comparing predictions based on sets to observed number events data is presented. It applied compare from most commonly PDFs Bjorken $x$. wide variation found ability predict results. scheme including high-$x$...
The system created in non central relativistic nucleus-nucleus collisions carries large angular orbital momentum. Due to spin-orbital coupling, produced particles could be globally polarized along the direction of We present results a measurement Lambda hyperon global polarization Au+Au at center mass energies 62 and 200 GeV with STAR detector RHIC. observed hyperons acceptance is consistent zero within precision measurement. obtained upper limit, |P_Lambda| < 0.01, significantly below...
Abstract We present results of directed flow measurements in Pb+Pb collisions at beam momentum p = 13 A GeV/ c recorded NA61/Shine 2016. Directed is measured relative to the symmetry plane projectile spectators. Measurements are performed differentially transverse momentum, rapidity and collision centrality. v 1 ( T ) y for protons negatively charged pions different centrality classes. The analysis techniques developed as a part this work will be used future CBM experiment FAIR MPD NICA.
The exclusive photoproduction reactions $\gamma p \to J/\psi(1S) p$ and \psi(2S) have been measured at an $ep$ centre-of-mass energy of 318 GeV with the ZEUS detector HERA using integrated luminosity 373 pb$^{-1}$. measurement was made in kinematic range $30 < W 180$ GeV, $Q^2 1$ GeV$^2$ $|t| GeV$^2$, where $W$ is photon--proton energy, $Q^2$ photon virtuality $t$ squared four-momentum transfer proton vertex. decay channels used were $J/\psi(1S) \mu^+ \mu^-$, $\psi(2S) \mu^-$ \pi^+ \pi^-$...
Lorentz and $CPT$ symmetry in the quark sector of Standard Model are studied context an effective field theory using ZEUS ${e}^{\ifmmode\pm\else\textpm\fi{}}p$ data. Symmetry-violating effects can lead to time-dependent oscillations otherwise time-independent observables, including scattering cross sections. An analysis five years inclusive neutral-current deep inelastic events corresponding integrated HERA luminosity $372\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ at...
We present an analysis of the anisotropic flow harmonics in Pb+Pb collisions at beam momenta 30A GeV/c collected by NA61/SHINE experiment year 2016. Directed and elliptic coefficients are measured relative to spectator plane estimated with Projectile Spectators Detector (PSD). The reported as a function transverse momentum different classes collision centrality. results compared new NA49 data for 40A GeV using forward calorimeters (VCal RCal) event estimation.
A bstract Collective behaviour of final-state hadrons, and multiparton interactions are studied in high-multiplicity ep scattering at a centre-of-mass energy $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 318 GeV with the ZEUS detector HERA. Two- four-particle azimuthal correlations, as well multiplicity, transverse momentum, pseudorapidity distributions for charged-particle multiplicities N ch ≥ 20 measured....