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arXiv · 1905.02207

Fitting the b-quark PDF as a massive-b scheme: Higgs production in bottom fusion

Stefano Forte·Tommaso Giani·Davide Napoletano
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Abstract

We show that a simple and accurate approach to the computation of hadron collider processes involving initial-state $b$ quarks can be obtained by introducing an independently parametrized b PDF. We use the so-called FONLL method for the matching of a scheme in which the b quark is treated as a massless parton to that in which it is treated as a massive state, and extend it to the case in which the b quark PDF is not necessarily determined by perturbative matching conditions. This generalizes to hadronic collisions analogous results previously obtained for deep-inelastic scattering. The results corresponds to a `massive b' scheme, in which b mass effects are retained, yet the b quark is endowed with a PDF. We specifically study Higgs production in bottom fusion, and show that our approach overcomes difficulties related to the fact that in a standard massive four-flavor scheme b-quark induced processes only start at high perturbative orders.

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Stefano Forte, Tommaso Giani, Davide Napoletano. 2019-05-06. Fitting the b-quark PDF as a massive-b scheme: Higgs production in bottom fusion. https://doi.org/10.1140/epjc%2Fs10052-019-7119-3

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