Two-loop gg Hg amplitude mediated by a nearly massless quark
Abstract
We analytically compute the two-loop scattering amplitude gg Hg assuming that the mass of the quark, that mediates the ggH interaction, is vanishingly small. Our computation provides an important ingredient required to improve the theoretical description of the top-bottom interference effect in Higgs boson production in gluon fusion, and to elucidate its impact on the Higgs boson transverse momentum distribution.
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