arXiv:hep-th/9810144·v1·High Energy Physics — Theory
The effective potential of composite fields in weakly coupled QED in a uniform external magnetic field
D.-S. Lee🇹🇼 · P. N. McGraw🇺🇸 · Y. J. Ng🇺🇸 · I. A. Shovkovy🇺🇸
Abstract
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.
Comments: 6 pages, 1 figure, REVTeX, uses epsf.sty