Conserved charge fluctuations are not conserved during the hadronic phase

Abstract

We study the correlation between the distributions of the net-charge, net-kaon, net-baryon and net-proton number at hadronization and after the final hadronic decoupling by simulating ultra relativistic heavy ion collisions with the hybrid version of the ultrarelativistic quantum molecular dynamics (UrQMD) model. We find that due to the hadronic rescattering these distributions are not strongly correlated. The calculated change of the correlation, during the hadronic expansion stage, does not support the recent paradigm, namely that the measured final moments of the experimentally observed distributions do give directly the values of those distributions at earlier times, when the system had been closer to the QCD crossover.

7 pages, 5 figures, version accepted by PLB

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• Far-from-equilibrium search for the QCD critical point
• Particlization of an interacting hadron resonance gas with global conservation laws for event-by-event fluctuations in heavy-ion collisions
• Critical point of nuclear matter and beam energy dependence of net proton number fluctuations
• Critical lensing and kurtosis near a critical point in the QCD phase diagram in and out-of-equilibrium
• Effects of volume corrections and resonance decays on cumulants of net-charge distributions in a Monte Carlo hadron resonance gas model
• Beam energy scan theory: Status and open questions
• Event-by-event fluctuations in p+p and central A+A collisions within relativistic transport models
• The QCD Phase Diagram from Statistical Model Analysis
• The BEST framework for the search for the QCD critical point and the chiral magnetic effect
• Effects of a non-zero strangeness-chemical potential in strong interaction models
• Hydrodynamic description of the baryon-charged quark-gluon plasma
• The Equation of State with the EPOS3 model
• Density Functional Equation of State and Its Application to the Phenomenology of Heavy-Ion Collisions
• Testing Charm Quark Equilibration in Ultra-High Energy Heavy Ion Collisions with Fluctuations
• Statistical method in quark combination model