Study of (W/Z)H production and Higgs boson couplings using H→ WW* decays with the ATLAS detector
Abstract
A search for Higgs boson production in association with a W or Z boson, in the H→ W W* decay channel, is performed with a data sample collected with the ATLAS detector at the LHC in proton-proton collisions at centre-of-mass energies √s=7 TeV and 8 TeV, corresponding to integrated luminosities of 4.5 fb–1 and 20.3 fb–1, respectively. The WH production mode is studied in two-lepton and three-lepton final states, while two- lepton and four-lepton final states are used to search for the ZH production mode. The observed significance, for the combined WH and ZH production, is 2.5 standard deviations while a significance of 0.9 standard deviations is expected in the Standard Model Higgs boson hypothesis. The ratio of the combined WH and ZH signal yield to the Standard Model expectation, μVH, is found to be μVH = 3.0–1.1+1.3 (stat.)–0.7+1.0 (sys.) for the Higgs boson mass of 125.36 GeV. WH and ZH production modes are also combined with the gluon fusion and vector boson fusion production modes studied in the H → W W* → ℓνℓν decay channel, resulting in an overall observed significance of 6.5 standard deviations and μggF+VBF+VH=1.16–0.15+0.16 (stat.) –0.15+0.18 (sys.). The results are interpreted in terms of scalingmore »
- Authors:
-
- Aix-Marseille Univ. and CNRS/IN2P3, Marseille (France) et al.
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- The ATLAS collaboration; ATLAS Collaboration
- OSTI Identifier:
- 1222768
- Alternate Identifier(s):
- OSTI ID: 1222759; OSTI ID: 1407383
- Grant/Contract Number:
- AC02-06CH11357; AC02-05CH11231; SC00112704; AC03-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 8; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Hadron-Hadron Scattering; Higgs physics
Citation Formats
Aad, G. Study of (W/Z)H production and Higgs boson couplings using H→ WW* decays with the ATLAS detector. United States: N. p., 2015.
Web. doi:10.1007/JHEP08(2015)137.
Aad, G. Study of (W/Z)H production and Higgs boson couplings using H→ WW* decays with the ATLAS detector. United States. https://doi.org/10.1007/JHEP08(2015)137
Aad, G. Thu .
"Study of (W/Z)H production and Higgs boson couplings using H→ WW* decays with the ATLAS detector". United States. https://doi.org/10.1007/JHEP08(2015)137. https://www.osti.gov/servlets/purl/1222768.
@article{osti_1222768,
title = {Study of (W/Z)H production and Higgs boson couplings using H→ WW* decays with the ATLAS detector},
author = {Aad, G.},
abstractNote = {A search for Higgs boson production in association with a W or Z boson, in the H→ W W* decay channel, is performed with a data sample collected with the ATLAS detector at the LHC in proton-proton collisions at centre-of-mass energies √s=7 TeV and 8 TeV, corresponding to integrated luminosities of 4.5 fb–1 and 20.3 fb–1, respectively. The WH production mode is studied in two-lepton and three-lepton final states, while two- lepton and four-lepton final states are used to search for the ZH production mode. The observed significance, for the combined WH and ZH production, is 2.5 standard deviations while a significance of 0.9 standard deviations is expected in the Standard Model Higgs boson hypothesis. The ratio of the combined WH and ZH signal yield to the Standard Model expectation, μVH, is found to be μVH = 3.0–1.1+1.3 (stat.)–0.7+1.0 (sys.) for the Higgs boson mass of 125.36 GeV. WH and ZH production modes are also combined with the gluon fusion and vector boson fusion production modes studied in the H → W W* → ℓνℓν decay channel, resulting in an overall observed significance of 6.5 standard deviations and μggF+VBF+VH=1.16–0.15+0.16 (stat.) –0.15+0.18 (sys.). The results are interpreted in terms of scaling factors of the Higgs boson couplings to vector bosons (κV) and fermions (κF); the combined results are: |κV|=1.06–0.10+0.10, |κF|=0.85–0.20+0.26.},
doi = {10.1007/JHEP08(2015)137},
journal = {Journal of High Energy Physics (Online)},
number = 8,
volume = 2015,
place = {United States},
year = {Thu Aug 27 00:00:00 EDT 2015},
month = {Thu Aug 27 00:00:00 EDT 2015}
}
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