Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at√s=7 and 8 TeV in the ATLAS experiment

ATLAS Publications, G. Aad, 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-JovinJuan Anton Aguilar-Saavedra, Steven Ahlen, Faig Ahmadov, Giulio Aielli, Henrik Akerstedt, Torsten Pa Åkesson, Ginga Akimoto, 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

Combined analyses of the Higgs boson production and decay rates as well as its coupling strengths to vector bosons and fermions are presented. The combinations include the results of the analyses of the H→γγ,ZZ*,WW*,Zγ,bb¯,ττ and μμ decay modes, and the constraints on the associated production with a pair of top quarks and on the off-shell coupling strengths of the Higgs boson. The results are based on the LHC proton-proton collision datasets, with integrated luminosities of up to 4.7 fb−1 at √s=7 TeV and 20.3 fb−1 at √s=8 TeV, recorded by the ATLAS detector in 2011 and 2012. Combining all production modes and decay channels, the measured signal yield, normalised to the Standard Model expectation, is 1.18+0.15−0.14. The observed Higgs boson production and decay rates are interpreted in a leading-order coupling framework, exploring a wide range of benchmark coupling models both with and without assumptions on the Higgs boson width and on the Standard Model particle content in loop processes. The data are found to be compatible with the Standard Model expectations for a Higgs boson at a mass of 125.36 GeV for all models considered.
Original languageEnglish
Article number6 (2016)
Number of pages51
JournalEuropean Physical Journal C
Volume76
Issue number1
DOIs
Publication statusPublished - 5 Jan 2016

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