Search for the b¯b decay of the Standard Model Higgs boson in associated (W/Z)H production with the ATLAS detector

Allison, Lee and Barton, Adam and Beattie, Michael and Borissov, Guennadi and Bouhova-Thacker, Eva and Chilingarov, Alexandre and Dearnaley, William and Fox, Harald and Grimm, Kathryn and Henderson, Robert and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin and Love, Peter and Maddocks, Harvey and Smizanska, Maria and Walder, James and Muenstermann, Daniel Matthias Alfred (2015) Search for the b¯b decay of the Standard Model Higgs boson in associated (W/Z)H production with the ATLAS detector. Journal of High Energy Physics, 2015 (1). ISSN 1029-8479

[img]
Preview
PDF (art%3A10.1007%2FJHEP01%282015%29069)
art_3A10.1007_2FJHEP01_282015_29069.pdf - Published Version
Available under License Creative Commons Attribution.

Download (2MB)

Abstract

A search for the bb¯ decay of the Standard Model Higgs boson is performed with the ATLAS experiment using the full dataset recorded at the LHC in Run 1. The integrated luminosities used are 4.7 and 20.3 fb−1 from pp collisions at s√=7 and 8 TeV, respectively. The processes considered are associated (W/Z)H production, where W → eν/μν, Z → ee/μμ and Z → νν. The observed (expected) deviation from the background-only hypothesis corresponds to a significance of 1.4 (2.6) standard deviations and the ratio of the measured signal yield to the Standard Model expectation is found to be μ = 0.52 ± 0.32 (stat.) ± 0.24 (syst.) for a Higgs boson mass of 125.36 GeV. The analysis procedure is validated by a measurement of the yield of (W/Z)Z production with Z→bb¯ in the same final states as for the Higgs boson search, from which the ratio of the observed signal yield to the Standard Model expectation is found to be 0.74 ± 0.09 (stat.) ± 0.14 (syst.).

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Additional Information:
The final publication is available at Springer via http://dx.doi.org/10.1007/JHEP01(2015)069 Date of Acceptance: 21/11/2014
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
73999
Deposited By:
Deposited On:
18 Jun 2015 05:58
Refereed?:
Yes
Published?:
Published
Last Modified:
08 Apr 2020 02:43