Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states
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Chatrchyan-2014-Measurement of Higgs.pdf
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Author(s)
Apyan, Aram
Busza, Wit
Cali, Ivan Amos
Chan, M.
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Gulhan, Doga Can
Klute, Markus
Lai, Yue Shi
Date Issued
January 2014
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Measurement of Higgs Boson Production and Properties in the WW Decay Channel with Leptonic Final States.” J. High Energ. Phys. 2014, no. 1 (January 2014). © CERN, for the benefit of the CMS Collaboration
Version
Final published version
Abstract
A search for the standard model Higgs boson decaying to a W-boson pair at the LHC is reported. The event sample corresponds to an integrated luminosity of 4.9 fb[superscript −1] and 19.4 fb[superscript −1] collected with the CMS detector in pp collisions at √s = 7 and 8 TeV, respectively. The Higgs boson candidates are selected in events with two or three charged leptons. An excess of events above background is observed, consistent with the expectation from the standard model Higgs boson with a mass of around 125 GeV. The probability to observe an excess equal or larger than the one seen, under the background-only hypothesis, corresponds to a significance of 4.3 standard deviations for m [subscript H] = 125.6 GeV. The observed signal cross section times the branching fraction to WW for m [subscript H] = 125.6 GeV is 0.72[+0.20 over −0.18] times the standard model expectation. The spin-parity J [superscript P] = 0[superscript +] hypothesis is favored against a narrow resonance with J [superscript P] = 2[superscript +] or J [superscript P] = 0[superscript −] that decays to a W-boson pair. This result provides strong evidence for a Higgs-like boson decaying to a W-boson pair.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1007/jhep01(2014)096
