EPJ Web of Conferences (Jan 2023)

Fluctuations in heavy ion collisions and global conservation effects

  • Poberezhnyuk Roman,
  • Vovchenko Volodymyr,
  • Savchuk Oleh,
  • Koch Volker,
  • Gorenstein Mark,
  • Stoecker Horst

DOI
https://doi.org/10.1051/epjconf/202327601005
Journal volume & issue
Vol. 276
p. 01005

Abstract

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Subensemble is a type of statistical ensemble which is the generalization of grand canonical and canonical ensembles. The subensemble acceptance method (SAM) provides general formulas to correct the cumulants of distributions in heavy-ion collisions for the global conservation of all QCD charges. The method is applicable for an arbitrary equation of state and sufficiently large systems, such as those created in central collisions of heavy ions. The new fluctuation measures insensitive to global conservation effects are presented. The main results are illustrated in the hadron resonance gas and van der Waals fluid frameworks.