TY - JOUR
T1 - Calculation of the one W loop H→γγ decay amplitude with a lattice regulator
AU - Bursa, Francis
AU - Cherman, Aleksey
AU - Hammant, Thomas C.
AU - Horgan, Ron R.
AU - Wingate, Matthew
PY - 2012/5/15
Y1 - 2012/5/15
N2 - There has been a recent controversial claim that the standard result on the Higgs to two photon decay rate is incorrect, with the use of dimensional regularization fingered as the alleged culprit. Given the great importance of the H→γγ process as a possible standard model Higgs discovery channel at the LHC if the Higgs mass is light, it is critical to find a way to check the correctness of the results of dimensional regularization for this process. Here we report the results of a perturbative calculation of the H→γγ decay amplitude using a spacetime lattice as a UV regulator, which is the only known gauge-invariant regulator for non-Abelian gauge theories other than dimensional regularization. We find that the decay amplitude calculated using lattice-regularized perturbation theory is consistent to very high statistical accuracy with the decay amplitude obtained using dimensional regularization.
AB - There has been a recent controversial claim that the standard result on the Higgs to two photon decay rate is incorrect, with the use of dimensional regularization fingered as the alleged culprit. Given the great importance of the H→γγ process as a possible standard model Higgs discovery channel at the LHC if the Higgs mass is light, it is critical to find a way to check the correctness of the results of dimensional regularization for this process. Here we report the results of a perturbative calculation of the H→γγ decay amplitude using a spacetime lattice as a UV regulator, which is the only known gauge-invariant regulator for non-Abelian gauge theories other than dimensional regularization. We find that the decay amplitude calculated using lattice-regularized perturbation theory is consistent to very high statistical accuracy with the decay amplitude obtained using dimensional regularization.
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U2 - 10.1103/PhysRevD.85.093009
DO - 10.1103/PhysRevD.85.093009
M3 - Article
AN - SCOPUS:84861682126
SN - 1550-7998
VL - 85
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 9
M1 - 093009
ER -