Search for a high-mass Higgs boson decaying to a W boson pair in pp collisions at √s = 8 TeV with the ATLAS detector

The ATLAS Collaboration, Brad Abbott, Jalal Abdallah, Ovsat Abdinov, Rosemarie Aben, Maris Abolins, Ossama AbouZeid, Halina Abramowicz, Henso Abreu, Ricardo Abreu, Yiming Abulaiti, Bobby Sami Acharya, Leszek Adamczyk, David Adams, Jahred Adelman, Stefanie Adomeit, Tim Adye, Tony Affolder, Tatjana Agatonovic-Jovin, Johannes AgricolaJuan Anton Aguilar-Saavedra, Steven Ahlen, Faig Ahmadov, Giulio Aielli, Henrik Akerstedt, Torsten Pa Åkesson, Andrei Akimov, Gian Luigi Alberghi, Justin Albert, Solveig Albrand, Maria Jose Alconada Verzini, Martin Aleksa, Igor Aleksandrov, Calin Alexa, Gideon Alexander, Theodoros Alexopoulos, Muhammad Alhroob, Gianluca Alimonti, Lion Alio, John Alison, Steven Pat Alkire, Benedict Allbrooke, Phillip Allport, Alberto Aloisio, Alejandro Alonso, Francisco Alonso, P. J. Clark, S. M. Farrington, C. Leonidopoulos, V. J. Martin, C. Mills

Research output: Contribution to journalArticlepeer-review

Abstract

A search for a high-mass Higgs boson H is performed in the HWW → ℓνν and HWW → ℓνqq 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 σ H × BR(HWW) 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 WW decay channels are presented. At m H = 1500 GeV, the highest-mass point tested, σ H × BR(HWW) 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.
Original languageEnglish
Article number32
Number of pages66
Journal Journal of High Energy Physics
Volume2016
Issue number1
DOIs
Publication statusPublished - 7 Jan 2016

Fingerprint Dive into the research topics of 'Search for a high-mass Higgs boson decaying to a<i> W</i> boson pair in <i>pp</i> collisions at √s = 8 TeV with the ATLAS detector'. Together they form a unique fingerprint.

Cite this