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 (Formula Presented.) production can provide sensitive probes of the CP nature of the Higgs interactions.
Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction / Demartin, Federico*; Maltoni, Fabio; Mawatari, Kentarou; Page, Ben; Zaro, Marco. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - STAMPA. - 74:9(2014), pp. 3065.1-3065.19. [10.1140/epjc/s10052-014-3065-2]
Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction
Maltoni, Fabio;
2014
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 (Formula Presented.) production can provide sensitive probes of the CP nature of the Higgs interactions.File | Dimensione | Formato | |
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