HL-LHC projections for signal and background yield measurements of the H ! when the Higgs boson is produced in association with t quarks, W or Z bosons

ATLAS COLLABORATION, G. AAD, M.T. DOVA ET AL

Conferencia; ICHEP2014; 2014

In this note the expected yields and the signal significances of Standard Model Higgs bosons produced in association with top quarks or Z or W bosons are estimated. The signature of the two photons consistent with the Higgs mass is used to discriminate the signal from the background. A data set corresponding to 3000 1/fb recorded by an upgraded ATLAS detector running at 14 TeV with the high-luminosity LHC is assumed. Evidencefor WH and ZH production is expected as well as an observation with a significance of 8.2 for the t¯tH production mode. The projected signal strength precision is between 17% and 35%, depending on the production mode.