81 citations · 427 across the 22 of their papers we have counts for
22 papers
Spinodal enhancement of fluctuations in nucleus-nucleus collisions
Roman Poberezhnyuk, Oleh Savchuk, Volodymyr Vovchenko +4
Subensemble Acceptance Method (SAM) [1,2] is an essential link between measured event-by-event fluctuations and their grand canonical theoretical predictions such as lattice QCD. T…
Quantum van der Waals theory meets quarkyonic matter
Roman V. Poberezhnyuk, Horst Stoecker, Volodymyr Vovchenko
We incorporate the empirical low-density properties of isospin symmetric nuclear matter into the excluded-volume model for quarkyonic matter by including attractive mean field in t…
Molecular dynamics analysis of particle number fluctuations in the mixed phase of a first-order phase transition
Volodymyr A. Kuznietsov, Oleh Savchuk, Roman V. Poberezhnyuk +3
Molecular dynamics simulations are performed for a finite non-relativistic system of particles with Lennard-Jones potential. We study the effect of liquid-gas mixed phase on partic…
Fluctuations in heavy ion collisions and global conservation effects
Roman V. Poberezhnyuk, Volodymyr Vovchenko, Oleh Savchuk +3
Subensemble is a type of statistical ensemble which is the generalization of grand canonical and canonical ensembles. The subensemble acceptance method (SAM) provides general formu…
Machine learning based approach to fluid dynamics
Kirill Taradiy, Kai Zhou, Jan Steinheimer +3
We study the applicability of a Deep Neural Network (DNN) approach to simulate one-dimensional non-relativistic fluid dynamics. Numerical fluid dynamical calculations are used to g…
Phase diagram of interacting pion matter and isospin charge fluctuations
O. S. Stashko, O. V. Savchuk, R. V. Poberezhnyuk +2
Equation of state and electric (isospin) charge fluctuations are studied for matter composed of interacting pions. The pion matter is described by self interacting scalar fields vi…
Higher order conserved charge fluctuations inside the mixed phase
Roman V. Poberezhnyuk, Oleh Savchuk, Mark I. Gorenstein +2
General formulas are presented for higher order cumulants of the conserved charge statistical fluctuations inside the mixed phase. As a particular example the van der Waals model i…
Phase diagram of alpha matter with Skyrme-like scalar interaction
Leonid M. Satarov, Roman V. Poberezhnyuk, Igor N. Mishustin +1
The equation of state and phase diagram of strongly interacting matter composed of particles are studied in the mean-field approximation. The particle interactions are included…
Cumulants of multiple conserved charges and global conservation laws
Volodymyr Vovchenko, Roman V. Poberezhnyuk, Volker Koch
We analyze the behavior of cumulants of conserved charges in a subvolume of a thermal system with exact global conservation laws by extending a recently developed subensemble accep…
Bose-Einstein condensation phenomenology in systems with repulsive interactions
Oleh Savchuk, Yehor Bondar, Oleksandr Stashko +4
The role of repulsive interactions in statistical systems of Bose particles is investigated. Three different phenomenological frameworks are considered: a mean field model, an excl…
Critical point fluctuations: Finite size and global charge conservation effects
Roman V. Poberezhnyuk, Oleh Savchuk, Mark I. Gorenstein +6
We investigate simultaneous effects of finite system size and global charge conservation on thermal fluctuations in the vicinity of a critical point. For that we consider a finite…
Connecting fluctuation measurements in heavy-ion collisions with the grand-canonical susceptibilities
Volodymyr Vovchenko, Oleh Savchuk, Roman V. Poberezhnyuk +2
We derive the relation between cumulants of a conserved charge measured in a subvolume of a thermal system and the corresponding grand-canonical susceptibilities, taking into accou…
Binomial acceptance corrections for particle number distributions in high-energy reactions
Oleh Savchuk, Roman V. Poberezhnyuk, Volodymyr Vovchenko +1
The binomial acceptance correction procedure is studied for particle number distributions detected in high energy reactions in finite regions of the momentum space. We present acce…
Traces of the nuclear liquid-gas phase transition in the analytic properties of hot QCD
Oleh Savchuk, Volodymyr Vovchenko, Roman V. Poberezhnyuk +2
The nuclear liquid-gas transition at normal nuclear densities, fm, and small temperatures, MeV, has a large influence on analytic properties…
Chemical freeze-out conditions and fluctuations of conserved charges in heavy-ion collisions within quantum van der Waals model
R. Poberezhnyuk, V. Vovchenko, A. Motornenko +2
The chemical freeze-out parameters in central nucleus-nucleus collisions are extracted consistently from hadron yield data within the quantum van der Waals (QvdW) hadron resonance…
Non-congruent phase transitions in strongly interacting matter within the Quantum van der Waals model
Roman Poberezhnyuk, Volodymyr Vovchenko, Mark I. Gorenstein +1
The non-congruent liquid-gas phase transition (LGPT) in asymmetric nuclear matter is studied using the recently developed Quantum van der Waals model in the grand canonical ensembl…
Quantum van der Waals and Walecka models of nuclear matter
R. V. Poberezhnyuk, V. Vovchenko, D. V. Anchishkin +1
A comparable study of the quantum van der Waals and Walecka models of nuclear matter is presented. Each model contains two parameters which characterize the repulsive and attractiv…
Open charm production in central Pb+Pb collisions at the CERN SPS: statistical model estimates
R. V. Poberezhnyuk, M. Gazdzicki, M. I. Gorenstein
Charm particle production in nucleus-nucleus collisions at the CERN SPS energies is considered within a statistical approach. Namely, the Statistical Model of the Early Stage is us…
Fluctuations in the Statistical Model of the Early Stage of nucleus-nucleus collisions
R. V. Poberezhnyuk, M. I. Gorenstein, M. Gazdzicki
Predictions on fluctuations of hadron production properties in central heavy ion collisions are presented. They are based on the Statistical Model of the Early Stage and extend pre…
Limiting temperature of pion gas with the van der Waals equation of state
R. V. Poberezhnyuk, V. Vovchenko, D. V. Anchishkin +1
The grand canonical ensemble formulation of the van der Waals equation of state that includes the effects of Bose statistics is applied to an equilibrium system of interacting pion…
Scaled variance, skewness, and kurtosis near the critical point of nuclear matter
V. Vovchenko, D. V. Anchishkin, M. I. Gorenstein +1
The van der Waals (VDW) equation of state predicts the existence of a first-order liquid-gas phase transition and contains a critical point. The VDW equation with Fermi statistics…
Statistical Model of the Early Stage of nucleus-nucleus collisions with exact strangeness conservation
R. V. Poberezhnyuk, M. Gazdzicki, M. I. Gorenstein
The Statistical Model of the Early Stage, SMES, describes a transition between confined and deconfined phases of strongly interacting matter created in nucleus-nucleus collisions.…