Aspects of CP violation in the HZZ coupling at the LHC

Details Aspects of CP violation in the HZZ coupling at the LHC Aspects of CP violation in the HZZ coupling at the LHC

2007-08-03

arxiv.org/abs/0708.0458v2

JHEP 0712:031,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

36 pages, 17 figures, LaTeX, version accepted for publication

Scientific paper

10.1088/1126-6708/2007/12/031

We examine the CP-conserving (CPC) and CP-violating (CPV) effects of a general HZZ coupling through a study of the process H -> ZZ* -> 4 leptons at the LHC. We construct asymmetries that directly probe these couplings. Further, we present complete analytical formulae for the angular distributions of the decay leptons and for some of the asymmetries. Using these we have been able to identify new observables which can provide enhanced sensitivity to the CPV $H ZZ$ coupling. We also explore probing CP violation through shapes of distributions in different kinematic variables, which can be used for Higgs bosons with mH < 2 mZ.

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