Heavy Scalar, Vector, and Axial-Vector Mesons in Hot and Dense Nuclear Medium

Arvind Kumar

doi:10.1155/2014/549726

Abstract

In this work we shall investigate the mass modifications of scalar mesons (D0;B0), vector mesons (D*;B*), and axial-vector mesons (D1;B1) at finite density and temperature of the nuclear medium. The above mesons are modified in the nuclear medium through the modification of quark and gluon condensates. We will find the medium modification of quark and gluon condensates within chiral SU(3) model through the medium modification of scalar-isoscalar fieldsσandζat finite density and temperature. These medium modified quark and gluon condensates will further be used through QCD sum rules for the evaluation of in-medium properties of the above mentioned scalar, vector, and axial vector mesons. We will also discuss the effects of density and temperature of the nuclear medium on the scattering lengths of the above scalar, vector, and axial-vector mesons. The study of the medium modifications of the above mesons may be helpful for understanding their production rates in heavy-ion collision experiments. The results of present investigations of medium modifications of scalar, vector, and axial-vector mesons at finite density and temperature can be verified in the compressed baryonic matter (CBM) experiment of FAIR facility at GSI, Germany.

Highlights

The motive behind the heavy-ion collision experiments at different experimental facilities is to explore the different phases of QCD phase diagram
In the present paper we investigated the mass modifications of scalar mesons (D0, B0), vector mesons (D∗, B∗) and axialvector mesons (D1, B1) at finite density and temperature of the nuclear medium
We used QCD sum rules along with chiral SU(3) model to investigate the properties of above mentioned mesons

Summary

Introduction

The motive behind the heavy-ion collision experiments at different experimental facilities is to explore the different phases of QCD phase diagram. For zero baryon density, using the chiral SU(3) model the values of scalar gluon condensates for finite (zero) quark mass term are observed to be 1.94264 × 10−2 (2.34550 × 10−2), 1.94269 × 10−2 (2.3454 × 10−2), and 1.94456 × 10−2 (2.3437 × 10−2) GeV4 at temperatures T = 50, 100, and 150 MeV, respectively.

Results

Conclusion