Higgs Decay into Two Photons through the W-boson Loop: No Decoupling in the m_W --> 0 Limit
High Energy Physics - Phenomenology
2013-05-30 v3
Abstract
We reanalyze the W-boson loop in the amplitude of the Higgs decay into two photons to show the absence of decoupling in the limit of massless W bosons, m_W --> 0. The Higgs coupling to longitudinal polarizations survive in this limit and generates a nonvanishing contribution in the decay. This shows that the recent claim of decoupling by R. Gastmans, S.L. Wu, and T.T. Wu is incorrect, and the old calculations for the two photon decay well known in the literature are valid.
Keywords
Cite
@article{arxiv.1109.1785,
title = {Higgs Decay into Two Photons through the W-boson Loop: No Decoupling in the m_W --> 0 Limit},
author = {M. Shifman and A. Vainshtein and M. B. Voloshin and V. Zakharov},
journal= {arXiv preprint arXiv:1109.1785},
year = {2013}
}
Comments
7 pages, no figures; the version accepted for publication in Physical Review