PoS - Proceedings of Science
Volume 276 - Fourth Annual Large Hadron Collider Physics (LHCP2016) - Parallel: Higgs physics in the Standard Model and beyond. Conveners: C. Gwilliam, A. David, M. Zaro
Heavy Higgs boson resonances and their decay into top quarks at the LHC
W. Bernreuther, P. Galler*, C. Mellein, Z.G. Si and P. Uwer
Full text: pdf
Pre-published on: September 14, 2016
Published on: March 28, 2017
Abstract
We investigate, within the type-II two-Higgs-doublet extension of the standard model (SM), the impact of heavy neutral Higgs boson resonances with unsuppressed Yukawa couplings to top quarks on top-quark pair production at the LHC at next-to-leading order (NLO) in the strong coupling constant. We take into account the resonant Higgs boson contributions, the non-resonant SM $t\bar{t}$ continuum and the interference of these two contributions. The NLO QCD corrections to heavy Higgs production and the interference contributions are
calculated in the large top-quark mass ($m_t$) limit, including an effective K-factor rescaling. Our evaluation of the QCD-Higgs interference is focused on the Higgs resonance region. Using representative $CP$-conserving as well as $CP$-violating parameter scenarios phenomenological results are presented for different observables.
DOI: https://doi.org/10.22323/1.276.0088
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