Higgs production in association with a single top quark at the LHC

Federico Demartin (1) , Fabio Maltoni (1) , Kentarou Mawatari (2) , Marco Zaro (3)

1 UCL - Université Catholique de Louvain = Catholic University of Louvain
2 VUB - Vrije Universiteit Brussel
3 LPTHE - Laboratoire de Physique Théorique et Hautes Energies

We present a detailed study of Higgs boson production in association with a single top quark at the LHC, at next-to-leading order accuracy in QCD. We consider total and differential cross sections, at the parton level as well as by matching short distance events to parton showers, for both t-channel and s-channel production. We provide predictions relevant for the LHC at 13 TeV together with a thorough evaluation of the residual uncertainties coming from scale variation, parton distributions, strong coupling constant and heavy quark masses. In addition, for t-channel production, we compare results as obtained in the 4-flavour and 5-flavour schemes, pinning down the most relevant differences between them. Finally, we study the sensitivity to a non-standard-model relative phase between the Higgs couplings to the top quark and to the weak bosons.

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

Federico Demartin, Fabio Maltoni, Kentarou Mawatari, Marco Zaro. Higgs production in association with a single top quark at the LHC. 2015. ⟨hal-01140804⟩