Study of Higgs boson production at LHC near the WW resonance.pdf

6 STUDY OF HIGGS BOSON PRODUCTION AT LHC NEAR THE WW 0 RESONANCE 0 2 y C. DELAERE, a on behalf of the CMS collaboration M Institut de physique nucl´eaire, Universit´e catholique de Louvain, 7 2 chemnin du cyclotron, 1348 Louvain-la-Neuve, Belgium 1 The study of WW Higgs boson decays is one of the key elements of the LHC physics program, v as these decays are dominant close to the WW resonance. Recent results obtained using the 9 full simulation of the detector are presented in the framework of the Standard Model. Direct 1 0 production, associated WH production and boson fusion processes are considered. 5 0 6 1 Introduction 0 / x Since a few years, various Higgs boson decay channels have been studied in the view of the e- forthcoming LHC startup. The Standard-Model branching ratio of the Higgs boson are presented p in Figure 1a. Close to the WW resonance, all decay modes but the WW decay are suppressed. e h In order to ensure more than a unique observation mode, several production processes must : be considered. The Standard-Model cross-section for each Higgs boson production mechanism v i is shown in Figure 1b, as a function of the Higgs boson mass. The dominant contribution to X Higgs boson production at LHC comes from gluon-fusion processes, from the weak vector boson r a fusion mechanism, and from Higgsstrahlung processes, where the Higgs boson is produced in association with a W or Z boson. All three pro