Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states
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 and 19.4 inverse femtobarns 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 mH = 125.6 GeV. The observed signal cross section times the branching fraction to WW for mH = 125.6 GeV is 0.72+0.20-0.18 times the standard model expectation. The spin-parity JP=0+ hypothesis is favored against a narrow resonance with JP=2+ or JP=0– that decays to a W-boson pair. Lastly, this result provides strong evidence for a Higgs-like boson decaying to a W-boson pair.
- Authors:
-
- Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- The CMS Collaboration
- OSTI Identifier:
- 1151700
- Report Number(s):
- FERMILAB-PUB-13-616-CMS
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1312.1129
- Grant/Contract Number:
- AC02-07CH11359
- 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: 2014; Journal Issue: 1; 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
Chatrchyan, Serguei. Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states. United States: N. p., 2014.
Web. doi:10.1007/JHEP01(2014)096.
Chatrchyan, Serguei. Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states. United States. https://doi.org/10.1007/JHEP01(2014)096
Chatrchyan, Serguei. Fri .
"Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states". United States. https://doi.org/10.1007/JHEP01(2014)096. https://www.osti.gov/servlets/purl/1151700.
@article{osti_1151700,
title = {Measurement of Higgs boson production and properties in the WW decay channel with leptonic final states},
author = {Chatrchyan, Serguei},
abstractNote = {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 and 19.4 inverse femtobarns 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 mH = 125.6 GeV. The observed signal cross section times the branching fraction to WW for mH = 125.6 GeV is 0.72+0.20-0.18 times the standard model expectation. The spin-parity JP=0+ hypothesis is favored against a narrow resonance with JP=2+ or JP=0– that decays to a W-boson pair. Lastly, this result provides strong evidence for a Higgs-like boson decaying to a W-boson pair.},
doi = {10.1007/JHEP01(2014)096},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2014,
place = {United States},
year = {Fri Jan 17 00:00:00 EST 2014},
month = {Fri Jan 17 00:00:00 EST 2014}
}
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