In-medium J/ψ mass shift by the D meson loop effect

K Tsushima,R Chhabra

doi:10.1088/1742-6596/1690/1/012108

Abstract

The mass shift of the J/^ state in-medium in symmetric nuclear matter with zero and finite temperature and cold strange matter was investigated by an effective Lagrangian plus QCD sum-rule approach. The in-medium mass of the J/ψ state is evaluated through the intermediate pseudoscalar D-meson loop for the J/ψ self-energy. The effect of medium is incorporated through the in-medium mass of D meson calculated using chiral SU(3) model plus QCD sum-rule approach. The self energy loop integral is regularized using the phenomenological form factor of the dipole form. We compare our results with some of the results in the literature. The present results should be helpful to better understand the expected data from heavy ion collision experiments, such as CBM and PANDA.

Highlights

The study of in-medium hadron properties is very important to understand better the data from heavy ion collision (HIC) experiments
J/ψ suppression is known as one of the signatures of the quark gluon plasma (QGP) production in HICs. It was suggested first by Matsui and Satz that the drop in the yield of the J/ψ state in HICs is due to the color screening effect, and this should be considered as a signature of the production of QGP [1]
We study the impact of the pseudoscalar D-meson loop contribution on the mass shift of J/ψ state in hot and strange hadronic medium

Summary

Introduction

The study of in-medium hadron properties is very important to understand better the data from heavy ion collision (HIC) experiments. The studies of charmed hadron as well as charmonium properties in medium will advance in understanding the interaction of these mesons with the nucleons. Their properties in a strange hadronic medium will add interesting, extra and new information. Further studies on the modification of the J/ψ state in medium will add extra important information on the production of QGP in heavy ion experiments. The charmonium interaction with the nucleon and hadronic medium was investigated in Refs. The medium effects are incorporated through the in-medium modified mass of D meson, calculated using chiral SU(3) model plus QCD sum-rule approach [15]

Methods

Results

Conclusion