Search for a Multi-Higgs Boson Cascade in W+W−bb¯ events with the ATLAS detector in pp collisions at √s = 8 TeV

ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL

PHYSICAL REVIEW D

AMER PHYSICAL SOC

Lugar: New York; Año: 2013 vol. 231 p. 1 - 23

1550-7998

A search is presented for new particles in an extension to the Standard Model that includes a heavyHiggs boson (H 0 ), an intermediate charged Higgs boson pair (H ± ), and a light Higgs boson (h0 ). Theanalysis searches for events involving the production of a single heavy neutral Higgs boson whichdecays to the charged Higgs boson and a W boson, where the charged Higgs boson subsequentlydecays into a W boson and the lightest neutral Higgs boson decaying to a bottom?antibottom-quarkpair. Such a cascade results in a W -boson pair and a bottom?antibottom-quark pair in the final state.Events with exactly one lepton, missing transverse momentum, and at least four jets are selectedfrom a data sample corresponding to an integrated luminosity of 20.3 fb−1 , collected by the ATLAS√detector in proton?proton collisions at s = 8 TeV at the LHC. The data are found to be consistentwith Standard Model predictions, and 95% confidence-level upper limits are set on the product ofcross section and branching ratio. These limits range from 0.065 pb to 43 pb as a function of H 0 andH ± masses, with mh0 fixed at 125 GeV.