The effective potential for the composite fields responsible for chiral symmetry breaking in weakly coupled QED in a magnetic field is derived. The global minimum of the effective potential is found to acquire a non-vanishing expectation value of the composite fields that leads to generating the dynamical fermion mass by an external magnetic field. The results are compared with those for the Nambu-Jona-Lasinio model.
|Number of pages
|Physical Review D - Particles, Fields, Gravitation and Cosmology
|Published - Apr 15 1999
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)