Equation of States and Charmonium Suppression in Heavy-Ion Collisions

Indrani Nilima,Vineet Kumar Agotiya

doi:10.1155/2019/9574136

Indrani Nilima, Vineet Kumar Agotiya

Open Access

https://doi.org/10.1155/2019/9574136

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Abstract

The present article is the follow-up of our work Bottomonium suppression in quasi-particle model, where we have extended the study for charmonium states using quasi-particle model in terms of quasi-gluons and quasi quarks/antiquarks as an equation of state. By employing medium modification to a heavy quark potential thermodynamic observables, viz., pressure, energy density, speed of sound, etc. have been calculated which nicely fit with the lattice equation of state for gluon, massless, and as well massive flavored plasma. For obtaining the thermodynamic observables we employed the debye mass in the quasi particle picture. We extended the quasi-particle model to calculate charmonium suppression in an expanding, dissipative strongly interacting QGP medium (SIQGP). We obtained the suppression pattern for charmonium states with respect to the number of participants at mid-rapidity and compared it with the experimental data (CMS JHEP) and (CMS PAS) at LHC energy (Pb+Pb collisions, sNN = 2.76 TeV).

Highlights

The primary goal of heavy-ion experiment at the Relativistic Heavy-Ion Collider (RHIC) and the LHC is to search a new state of matter, i.e., the Quark Gluon Plasma
The heavy quarks can be calculated in pQCD, which are produced in primary hard N N collisions [1].The charmonia is a bound states of charm (c) and anticharm (c), which is an extremely broad and interesting field of investigation [2]
We will discuss the physical understanding of charmonium suppression due to screening in the deconfined medium produced in relativistic nucleus-nucleus collisions

Summary

Introduction

The primary goal of heavy-ion experiment at the RHIC and the LHC is to search a new state of matter, i.e., the Quark Gluon Plasma. In our previous work [60], we had calculated the plasma parameter, pressure, energy density, and speed of sound for only 3-flavor QGP and studied the sequential suppression for bottomonium states at the LHC energy in a longitudinally expanding partonic system for only η/s = 0.08 because the experimental data is available only for ADS/CFT case In this present article we have extended our previous work for charmonium states for all 3-flavors by using quasi-particle model in terms of quasi-gluons and quasi quarks/antiquarks as an equation of state.

Medium Modified Effective Potential and Fugacity Quasi-Particle Model

Binding Energy and Dissociation Temperature

Equation of States of Different Flavors in Quasi-Particle Picture

Survival Probability of cc States

Results and Discussion

Conclusion