Hypergeometric representation of one-loop Higgs decay to two photons

摘要

In this paper, we derive hypergeometric function representation of one-loop contributing to Higgs decay to two photons in the standard model and its extensions. The calculations are performed at general space-time dimension d. For the first time, analytic results are published for form factors that are valid in arbitrary space-time dimension. Moreover, we confirm against analytic results in previous computations that have been available in space-time dimension d = 4 - 2 epsilon at epsilon(0) expansions.