Susceptibilities from a black hole engineered EoS with a critical point

Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions 2016

Portillo, Israel^1

Department of Physics, University of Houston, Houston

TX

77204, United States^1

关键词: Beam energies;    Black hole models;    Higher-order;    Holographic model;    Qcd phase diagrams;    Series expansion;    Thermodynamic data;    Truncation errors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/832/1/012041/pdf
DOI  :  10.1088/1742-6596/832/1/012041

来源: IOP

【 摘 要 】

Currently at the Beam Energy Scan at RHIC experimental efforts are being made to find the QCD critical point. On the theoretical side, the behavior of higher-order susceptibilities of the net-baryon charge from Lattice QCD at μB= 0 may allow us to estimate the position of the critical point in the QCD phase diagram. However, even if the series expansion continues to higher-orders, there is always the possibility to miss the critical point behavior due to truncation errors. An alternative approach is to use a black hole engineered holographic model, which displays a critical point at large densities and matches lattice susceptibilities at μB = 0. Using the thermodynamic data from this black hole model, we obtain the freeze-out points extracted from the net-protons distribution measured at STAR and explore higher order fluctuations at the lowest energies at the beam energy scan to investigate signatures of the critical point.