Abstract
Abstract We consider the production of a single top quark in association with a Higgs boson at the LHC. In particular, we compute the cross sections for the processes pp → thj, thb, thW , thjj, thjb, thW j, thW b in the presence of the anomalous W tb, W W h and tth couplings. We find that the anomalous W tb and tth couplings can enhance the cross sections significantly. We also analyze a few signatures and show that, if these couplings are indeed anomalous, then with enough data, one should be able to observe the production of the Higgs boson in association with single top quark.
Highlights
JHEP12(2013)077 particles, apart from a top quark and a Higgs boson
We study the effect of anomalous W tb, tth and W W h interactions on the cross sections and distributions of the processes that involve the production of a single top quark in association with a Higgs boson at the LHC
We find that the enhancement in the cross sections can be more than a factor of ten for some values of the W tb and tth anomalous couplings, and as a result the associated production of a single top quark with the Higgs boson can become significant at the LHC
Summary
The processes with an extra jet are, p p → thjjX, p p → thjbX, p p → thWjX, p p → thWbX. The subleading diagrams can be obtained by adding an extra jet (either light or b-jet) to these three processes. Subleading processes can have relatively significant cross sections, but one has to be careful while computing their contribution at the matrix-element level. These extra jets can be soft and lead to infrared divergences. In that case the actual process will be pp → tth, which has a much larger cross section than the th production. To avoid such a situation, in our calculation, we allow only one of the top quark to go on-shell
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