Search for a Higgs boson in the diphoton final state using the full CDF data set from proton-antiproton collisions at √s=1.96 TeV.

Abstract

AsearchforanarrowHiggsbosonresonanceinthediphotonmassspectrumispresentedbased ondatacorrespondingto10fb?1ofintegratedluminosityfromproton-antiprotoncollisionsat p s= 1.96TeVcollectedbytheCDFexperiment.Inadditiontosearchingforaresonanceinthediphoton massspectrum,weemployamultivariatediscriminanttechniqueforthersttimeinthischannel atCDF.Noevidenceofsignalisobserved,andupperlimitsaresetonthecrosssectiontimes branchingratiooftheresonantstateasafunctionofHiggsbosonmass.Thelimitsareinterpreted inthecontextofthestandardmodelwithanexpected(observed)limitonthecrosssectiontimes branchingratioof9.9(17.0)timesthestandardmodelpredictionatthe95%credibilitylevelfora Higgsbosonmassof125GeV/c2.Moreover,aHiggsbosonwithsuppressedcouplingstofermions isexcludedformassesbelow114GeV/c2atthe95%credibilitylevel.