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

Summary, in English

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 p_T ^{Z Z} of the ZZ pair. We also introduce a fully transverse angular variable that could give information about the CP nature of the Higgs boson.

• Author: Rikkert Frederix; Massimiliano Grazzini
• Publishing year: 2008-05-01
• Language: English
• Pages: 353-359
• Publication/Series: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 662
• Issue: 4
• Links: http://dx.doi.org/10.1016/j.physletb.2008.03.030
• Document type: Journal article
• Publisher: Elsevier
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0370-2693