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- W2045125110 abstract "As a first step in the aim of arriving at a differential description of neutral Higgs boson decays into heavy quarks, $h to Q {bar Q}X$, to second order in the QCD coupling $alpha_S$, we have computed the $hQ{bar Q}$ amplitude at the two-loop level in QCD for a general neutral Higgs boson which has both scalar and pseudoscalar couplings to quarks. This amplitude is given in terms of a scalar and a pseudoscalar vertex form factor, for which we present closed analytic expressions in terms of one-dimensional harmonic polylogarithms of maximum weight 4. The results hold for arbitrary four-momentum squared, $q^2$, of the Higgs boson and of the heavy quark mass, $m$. Moreover we derive the approximate expressions of these form factors near threshold and in the asymptotic regime $m^2/q^2 ll 1$." @default.
- W2045125110 created "2016-06-24" @default.
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- W2045125110 date "2005-11-16" @default.
- W2045125110 modified "2023-10-16" @default.
- W2045125110 title "Decays of scalar and pseudoscalar Higgs bosons into fermions: Two-loop QCD corrections to the Higgs-quark-antiquark amplitude" @default.
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- W2045125110 doi "https://doi.org/10.1103/physrevd.72.096002" @default.
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