Exact quark-mass dependence of the Higgs-photon form factor at three loops in QCD

Marco Niggetiedt
2021 Journal of High Energy Physics  
We follow up on our discussion of the exact quark-mass dependence of the Higgs-gluon form factor at three loops in QCD [1] and turn our attention to the closely related Higgs-photon form factor. Similarly to our previous work, we intend to examine the form factor for the decay of a Higgs-boson with variable mass into two photons at the three-loop level in QCD. The set of master integrals is known numerically due to prior work on the Higgs-gluon form factor and is exploited to obtain expansions
more » ... round the threshold as well as in the high-energy limit. Our results may be utilised to derive the photonic decay rate of the Higgs-boson through next-to-next-to-leading order.
doi:10.1007/jhep04(2021)196 fatcat:fwbl6k2hdreevhkfo4g25zw2lu