81 citations · 427 across the 22 of their papers we have counts for
14 papers · 1 filter
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…
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…
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…
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…
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…