Mz. Yang et Xj. Zhou, ANALYTICAL RESULTS FOR PHOTON-PHOTON SCATTERING VIA BOSONIC LOOPS ANDFOR THE DECAY OF Z-]GAMMA-GAMMA-GAMMA VIA W-BOSON LOOPS, Physical review. D. Particles and fields, 52(9), 1995, pp. 5018-5024
The fourth rank polarization tensors of gamma-gamma scattering via W-b
oson loops in the standard model by using a nonlinear R(xi) gauge, and
via charged scalar meson loops in some nonstandard models are calcula
ted in terms of three transcendental functions of B(x), T(x), and I(x,
y). Expressions for the helicity amplitudes are also presented. The to
tal cross section of gamma-gamma scattering via W-boson loops in the l
ow energy approximation agrees with what was gained by using a linear
R(xi) gauge. Also a summary of our calculation of Z --> gamma gamma ga
mma via W-boson loops in the nonlinear R(xi) gauge is given, which agr
ees with the results of Glover and Morgan.