The rate of e+e- pair creation by external electric field in the presence of an incident photon beam is calculated for the photon energy far below the threshold, ω?m, and the field strength small as compared to the critical one, e<m2. We find the pair production rate using a recently developed method based on calculation of the process in a thermal bath with subsequent identification of the contribution of single-photon states. We demonstrate that a nontrivial dependence on the ratio of the small parameters, ωm/(eE), emerges in this approach from an essentially (semi)classical calculation.
|Original language||English (US)|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Jan 4 2010|