#### Alladi Ramakrishnan Hall

#### The application thermal field theory to study hot and dense nuclear matter

#### Najmul Haque

##### NISER

*It is well known that quarks and gluons are confined within hadrons at low temperature and density. At high temperature and/or high density, the hadronic states are believed to make a phase transition to a deconfined state of quarks and gluons, known as quark-gluon plasma, is produced. In order to understand the properties of a QGP and to make unambiguous predictions about signature of QGP formation, one needs a*

profound description of QGP. For this purpose we have to use QCD at finite temperature and chemical potential. There are two different approaches: 1) Lattice QCD is a non-perturbative method for solving the QCD equations numerically on a 4-dimensional space-time lattice. 2)

Perturbative QCD at finite temperature is based on the fact that the temperature dependent running coupling constant is small at high

temperatures due to asymptotic freedom. In this talk I will mainly focus on a resummed perturbative technique, known as Hard Thermal Loop

Perturbation Theory.

Done