Critical lensing and kurtosis near a critical point in the QCD phase diagram in and out-of-equilibrium

In this work, we study the lensing effect of the QCD critical point on hydrodynamic trajectories, and its consequences on the net-proton kurtosis \(\kappa_4\). Including critical behavior by means of the BEST Collaboration equation of state (EoS), we first consider a scenario in equilibrium, then co...

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Bibliographic Details
Published in:arXiv.org 2022-07
Main Authors: Dore, Travis, Karthein, Jamie M, Long, Isaac, Mroczek, Debora, Noronha-Hostler, Jacquelyn, Parotto, Paolo, Ratti, Claudia, Yamauchi, Yukari
Format: Article
Language:English
Subjects:
Critical point
Equations of state
Kurtosis
Phase diagrams
Online Access:Get full text
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Summary:In this work, we study the lensing effect of the QCD critical point on hydrodynamic trajectories, and its consequences on the net-proton kurtosis \(\kappa_4\). Including critical behavior by means of the BEST Collaboration equation of state (EoS), we first consider a scenario in equilibrium, then compare with hydrodynamic 0+1D simulations with Bjorken expansion, including both shear and bulk viscous terms. We find that, both in and out-of-equilibrium, the size and shape of the critical region directly affect if the signal will survive through the dynamical evolution.
ISSN:2331-8422
DOI:10.48550/arxiv.2207.04086