Search for a high-mass Higgs boson decaying to a $W$ boson pair in $pp$ collisions at $\\sqrts = 8$ TeV with the ATLAS detector
Journal
JHEP
Journal Volume
01
Pages
032
Date Issued
2016
Author(s)
Aad, Georges
Abstract
A search for a high-mass Higgs boson H is performed in the HW W and HW W qq decay channels using pp collision data corresponding to an integrated luminosity of 20.3 fb -1 collected at s = 8 TeV by the ATLAS detector at the Large Hadron Collider. No evidence of a high-mass Higgs boson is found. Limits on H BR(HW W ) as a function of the Higgs boson mass m H are determined in three different scenarios: one in which the heavy Higgs boson has a narrow width compared to the experimental resolution, one for a width increasing with the boson mass and modeled by the complex-pole scheme following the same behavior as in the Standard Model, and one for intermediate widths. The upper range of the search is m H = 1500 GeV for the narrow-width scenario and m H = 1000 GeV for the other two scenarios. The lower edge of the search range is 200-300 GeV and depends on the analysis channel and search scenario. For each signal interpretation, individual and combined limits from the two W W decay channels are presented. At m H = 1500 GeV, the highest-mass point tested, H BR(H W W ) for a narrow-width Higgs boson is constrained to be less than 22 fb and 6.6 fb at 95% CL for the gluon fusion and vector-boson fusion production modes, respectively.
Type
journal article