Higgs Decay to Two Photons

TL;DR

This paper calculates the Higgs boson decay amplitude to two photons using dimensional regularization, confirming gauge independence and finite results, and explores the large Higgs mass limit with the Goldstone-boson equivalence theorem.

Contribution

It provides a gauge-independent, finite calculation of Higgs to two photons decay amplitude in different gauges, validating previous results and analyzing the large mass limit.

Findings

The decay amplitude is finite and gauge independent.

Results agree with previous calculations.

Large Higgs mass limit analyzed using Goldstone-boson equivalence theorem.

Abstract

The amplitude for Higgs decay to two photons is calculated in renormalizable and unitary gauges using dimensional regularization at intermediate steps. The result is finite, gauge independent, and in agreement with previously published results. The large Higgs mass limit is examined using the Goldstone-boson equivalence theorem as a check on the use of dimensional regularization and to explain the absence of decoupling.