2007/04/30 by Qing-Hong Cao, Chuan-Ren Chen
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.76.073006
published as Phys.Rev.D76:073006,2007 · The version to appear in PRD
arxiv created 2007/09/07 · openalex publication_date 2007/10/15 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We examine the soft-gluon resummation effects, including the exact spin correlations among the final state particles, in the search of the standard model Higgs boson, via the process gg\ensuremath→H\ensuremath→WW/ZZ\ensuremath→4 leptons, at the Tevatron and the LHC. A comparison between the resummation and the next-to-leading order (NLO) calculation is performed after imposing various kinematics cuts suggested in the literature for the Higgs boson search. For the H\ensuremath→ZZ mode, the resummation effects increase the acceptance of the signal events by about 25%, as compared to the NLO prediction, and dramatically alter various kinematics distributions of the final state leptons. For the H\ensuremath→WW mode, the acceptance rates of the signal events predicted by the resummation and NLO calculations are almost the same, but some of the predicted kinematical distributions are quite different. Thus, to precisely determine the properties of the Higgs boson at hadron colliders, the soft-gluon resummation effects have to be taken into account.