Production of heavy Higgs bosons and decay into top quarks at the LHC. II. Top-quark polarization and spin correlation effects

W. Bernreuther, P. Galler, Z.-G. Si, and P. Uwer
Phys. Rev. D 95, 095012 – Published 17 May 2017

Abstract

We analyze, within several parameter scenarios of type-II two-Higgs doublet extensions of the standard model, the impact of heavy neutral Higgs-boson resonances on top-quark pair production and their subsequent decay to dileptonic final states at the LHC (13 TeV). In particular, we investigate the effects of heavy Higgs bosons on top-spin observables, that is, the longitudinal top-quark polarization and top-quark spin correlations. We take into account NLO QCD as well as weak interaction corrections and show that top-spin observables, if evaluated in judiciously chosen top-quark pair invariant mass bins, can significantly enhance the sensitivity to heavy Higgs resonances in top-quark pair events.

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  • Received 24 February 2017

DOI:https://doi.org/10.1103/PhysRevD.95.095012

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

W. Bernreuther1,*, P. Galler2,†, Z.-G. Si3,‡, and P. Uwer2,§

  • 1Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen University, 52056 Aachen, Germany
  • 2Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
  • 3School of Physics, Shandong University, Jinan, Shandong 250100, China

  • *breuther@physik.rwth-aachen.de
  • galler@physik.hu-berlin.de
  • zgsi@sdu.edu.cn
  • §peter.uwer@physik.hu-berlin.de

See Also

Production of heavy Higgs bosons and decay into top quarks at the LHC

W. Bernreuther, P. Galler, C. Mellein, Z.-G. Si, and P. Uwer
Phys. Rev. D 93, 034032 (2016)

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Vol. 95, Iss. 9 — 1 May 2017

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