About an influence of external electromagneticfields on the axion decays

Abstract

Some results of an external electromagnetic field influence on axion decays are presented. It is shown that the field catalyzes substantially these processes. The result describing the axion decay $a\to f\tilde{f}$ we have obtained can be of use to re-examine the lower limit on the axion mass in case of possible existence of strong magnetic fields at the early Universe stage.

Comments: 7 pages, latex. Talk given at NANP-97 workshop in Dubna, Russia, July 7-11, 1997