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 / F. Demartin, F. Maltoni, K. Mawatari, B. Page, M. Zaro. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 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

M. Zaro
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.
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/811373
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