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arXiv · 2207.04086

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

Travis Dore·Jamie M. Karthein·Isaac Long·Debora Mroczek·Jacquelyn Noronha-Hostler·Paolo Parotto·Claudia Ratti·Yukari Yamauchi
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Abstract

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.

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Travis Dore, Jamie M. Karthein, Isaac Long, Debora Mroczek, Jacquelyn Noronha-Hostler, Paolo Parotto, Claudia Ratti, Yukari Yamauchi. 2022-07-08. Critical lensing and kurtosis near a critical point in the QCD phase diagram in and out-of-equilibrium. https://doi.org/10.1103/physrevd.106.094024

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