Chiral symmetry breaking, color superconductivity and quark matter phase diagram: a variational approach
✍ Scribed by Hiranmaya Mishra; Jitendra C. Parikh
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 200 KB
- Volume
- 679
- Category
- Article
- ISSN
- 0375-9474
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✦ Synopsis
We discuss in this note simultaneous existence of chiral symmetry breaking and color superconductivity at finite temperature and density in a Nambu-Jona-Lasinio type model. The methodology involves an explicit construction of a variational ground state and minimisation of the thermodynamic potential. There exist nontrivial solutions to the gap equations at finite densities with both quark-antiquark as well as diquark condensates for the "ground" state. However, such a phase is thermodynamically unstable with the pressure being negative in this region. We also compute the equation of state, and obtain the structure of the phase diagram in the model.