Search for Standard Model Higgs Boson Production in Association with a W Boson Using a Matrix Element Technique at CDF in p\bar{p} Collisions at \sqrt{s} = 1.96 TeV.

Abstract

ThispaperpresentsasearchforstandardmodelHiggsbosonproductioninassociationwithaWboson usingeventsrecordedbytheCDFexperimentinadatasetcorrespondingtoanintegratedluminosityof 5:6fb1.Thesearchisperformedusingamatrixelementtechniqueinwhichthesignalandbackground hypothesesareusedtocreateapowerfuldiscriminator.Thediscriminantoutputdistributionsforsignal andbackgroundarefittotheobservedeventsusingabinnedlikelihoodapproachtosearchfortheHiggs bosonsignal.WefindnoevidenceforaHiggsboson,and95%confidencelevel(C.L.)upperlimitsareset onðpp!WHÞBðH!bbÞ.Theobservedlimitsrangefrom3.5to37.6relativetothestandard modelexpectationforHiggsbosonmassesbetweenmH ¼100GeV=c2andmH ¼150GeV=c2.The 95%C.L.expectedlimitisestimatedfromthemedianofanensembleofsimulatedexperimentsandvaries between2.9and32.7relativetotheproductionratepredictedbythestandardmodelovertheHiggsboson massrangestudied.