Nv. Mikheev et La. Vassilevskaya, ELECTROMAGNETIC CATALYSIS OF THE RADIATIVE DECAY OF THE AXION, Physics letters. Section B, 410(2-4), 1997, pp. 207-210
The radiative decay of the axion a --> gamma gamma is investigated in
an external electromagnetic field in DFSZ model in which axion couples
to both quarks and leptons at tree level. The decay probability is st
rongly catalyzed by the external field, namely, the field removes the
main suppression caused by the smallness of the axion mass. (C) 1997 E
lsevier Science B.V.