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 -