Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

Locating the critical point in QCD phase diagram using heat capacity

4 Nov 2019, 17:40

20m

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Search for the critical end point Poster Session

Speakers

Suman Deb (Indian Institute of Technology Indore (IN)) Raghunath Sahoo (Indian Institute of Technology Indore (IN))

Description

One of the main aims of beam energy scan (BES) program at relativistic heavy ion collider (RHIC) is to locate the position of critical point in the ($T-\mu_B$) plane of QCD where the first order transition ends and cross over transition begins. Here $T$ denotes temperature and $\mu_B$ stands for baryonic chemical potential.At the critical point, quantities like specific heat and susceptibility
are expected to diverge due to long range correlation.

In this work, we have studied variation of specific heat, speed of sound with center-of-mass energies for Au+Au collision at $\sqrt{s_{NN}}$= 7.7, 11.5,19.6, 27.0, 39.0, 62.4, 200 GeV with the help of Hadronic Resonance Gas (HRG) model by using temperature and chemical potential which are extracted from the freeze-out surface at these energies. It is observed that trend of variation of these quantities drastically change at a particular $\sqrt(s_{NN}$)} lying between 39 to 62.4 GeV, thereby hinting toward the possible location of the QCD critical point.