Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction
Abstract
At the LHC the CP properties of the top-quark Yukawa interaction can be probed through Higgs production in gluon fusion or in association with top quarks. We consider the possibility for both CP-even and CP-odd couplings to the top quark to be present, and study CP-sensitive observables at next-to-leading order (NLO) in QCD, including parton-shower effects. We show that the inclusion of NLO corrections sizeably reduces the theoretical uncertainties, and confirm that di-jet correlations in $H+2$ jet production through gluon fusion and correlations of the top-quark decay products in $t\bar tH$ production can provide sensitive probes of the CP nature of the Higgs interactions.
- Publication:
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European Physical Journal C
- Pub Date:
- September 2014
- DOI:
- 10.1140/epjc/s10052-014-3065-2
- arXiv:
- arXiv:1407.5089
- Bibcode:
- 2014EPJC...74.3065D
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 18 pages, 9 figures, 12 tables