Regular Article - Theoretical Physics
Top- and bottom-mass effects in hadronic Higgs production at small transverse momenta through lo+nll
Fachbereich C, Bergische Universität Wuppertal, 42097, Wuppertal, Germany
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Revised: 12 May 2013
Published online: 21 June 2013
The resummed transverse momentum distribution of the Higgs boson in gluon fusion through lo+nll for small transverse momenta is considered, where the Higgs is produced through a top- and bottom-quark loop. We study the mass effects with respect to the infinite top-mass approach. The top-mass effects are small and the heavy-top limit is valid to better than 4.5 % as long as the Higgs’ transverse momentum stays below 150 GeV. When the bottom loop is considered as well, the discrepancy reaches up to about 10 %. We conclude that bottom-mass effects cannot be included in a reasonable manner by a naive reweighting procedure in the heavy-top limit. We compare our results to an earlier, alternative approach based on POWHEG.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013