TY - JOUR
T1 - Higgs boson decay into two photons through the W-boson loop
T2 - No decoupling in the m W→0 limit
AU - Shifman, M.
AU - Vainshtein, A.
AU - Voloshin, M. B.
AU - Zakharov, V.
PY - 2012/1/20
Y1 - 2012/1/20
N2 - We reanalyze the W-boson loop in the amplitude of the Higgs boson 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 survives in this limit and generates a nonvanishing contribution in the H→γγ 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.
AB - We reanalyze the W-boson loop in the amplitude of the Higgs boson 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 survives in this limit and generates a nonvanishing contribution in the H→γγ 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.
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U2 - 10.1103/PhysRevD.85.013015
DO - 10.1103/PhysRevD.85.013015
M3 - Article
AN - SCOPUS:84856673918
SN - 1550-7998
VL - 85
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 1
M1 - 013015
ER -