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, Débora Mroczek, Jacquelyn Noronha-Hostler, Paolo Parotto, Claudia Ratti, Yukari Yamauchi
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 ${\ensuremath{\kappa}}_{4}$. Including critical behavior by means of the BEST Collaboration equation of state (EoS), we first consider a scenario in equilibrium, then compare with hydrodynamic $0+1\mathrm{D}$ 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.
Topics & Concepts
KurtosisCritical point (mathematics)PhysicsWork (physics)Statistical physicsCritical phenomenaQuantum chromodynamicsPhase diagramPhase transitionPhase (matter)ThermodynamicsParticle physicsMathematical analysisQuantum mechanicsMathematicsStatisticsHigh-Energy Particle Collisions ResearchParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions