Anatomy of the Higgs Boson Decay into Two Photons in the Unitary Gauge

  title={Anatomy of the Higgs Boson Decay into Two Photons in the Unitary Gauge},
  author={Athanasios Dedes and Kristaq Suxho},
  journal={Advances in High Energy Physics},
  • A. Dedes, K. Suxho
  • Published 29 September 2012
  • Physics
  • Advances in High Energy Physics
We review and clarify computational issues about the -gauge boson one-loop contribution to the decay amplitude, in the unitary gauge and in the Standard Model. We find that highly divergent integrals depend upon the choice of shifting momenta with arbitrary vectors. One particular combination of these arbitrary vectors reduces the superficial divergency down to a logarithmic one. The remaining ambiguity is then fixed by exploiting gauge invariance and the Goldstone Boson Equivalence Theorem… 

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