Higher-order QCD effects in the Higgs to ZZ search channel at the LHC

Details Higher-order QCD effects in the Higgs to ZZ search channel at the LHC Higher-order QCD effects in the Higgs to ZZ search channel at the LHC

2008-01-15

arxiv.org/abs/0801.2229v2

Phys.Lett.B662:353-359,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 8 figures. Discussion on scale uncertainties added

Scientific paper

10.1016/j.physletb.2008.03.030

We present a consistent analysis of the signal as well as the irreducible background for the search of the SM Higgs boson in the ZZ decay channel at the LHC. Soft-gluons effects are resummed up to next-to-leading logarithmic accuracy, and the results are compared to those obtained with fixed order calculations and the MC@NLO event generator. The soft-gluon effects are typically modest but should be taken into account when precise predictions are demanded. Our results show that the signal over background ratio can be significantly enhanced with a cut on the transverse momentum pt(ZZ) of the ZZ pair. We also introduce a fully transverse angular variable that could give information about the CP nature of the Higgs boson.

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