1998/12/16 by W. Bernreuther, Bernreuther, W., A. Brandenburg +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9812387
36 pages, 25 Postscript figures
arxiv created 1998/12/16 · openalex publication_date 1998/12/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A striking manifestation of CP violation in the electroweak symmetry breaking sector would be the existence of neutral Higgs boson(s) with undefined CP parity. We analyse signatures of such a boson, with a mass of about 300 GeV or larger, produced in high energy proton-proton collisions at LHC energies in its top-quark antitop-quark decay channel. The large irreducible t t background is taken into account. We propose, both for the dilepton and the lepton + jets decay channels of t t, several correlations and asymmetries with which (Higgs sector) CP violation can be traced. We show that for judiciously chosen cuts on the t t invariant mass these CP observables yield, for an LHC integrated luminosity of 100 \rmfb-1, statistically significant signals for a range of Higgs boson masses and Yukawa couplings.