FourFermion Interaction Model in a Constant Magnetic Field at Finite Temperature and Chemical Potential
Abstract
We investigate the influence of an external magnetic field on chiral symmetry breaking in a fourfermion interaction model at finite temperature and chemical potential. Using the FockSchwinger proper time method, we calculate the effective potential for the fourfermion interaction model to leading order in the 1/N_{c} expansion. The phase structure of the chiral symmetry breaking is determined in the Tμ, HT and μH planes. The external magnetic field modifies the phase structure. It is found that a new phase appears for a large chemical potential.
 Publication:

Progress of Theoretical Physics
 Pub Date:
 March 2004
 DOI:
 10.1143/PTP.111.371
 arXiv:
 arXiv:hepph/0312005
 Bibcode:
 2004PThPh.111..371I
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 16 pages, 10 figures