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Observation and measurement of Higgs boson decays to WW∗with the ATLAS detector

Aad, G.
•
Abbott, B.
•
Abdallah, J.
altro
Zwalinski, L.
2015
  • journal article

Periodico
PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
Abstract
We report the observation of Higgs boson decays to WW∗based on an excess over background of 6.1 standard deviations in the dilepton final state, where the Standard Model expectation is 5.8 standard deviations. Evidence for the vector-boson fusion (VBF) production process is obtained with a significance of 3.2 standard deviations. The results are obtained from a data sample corresponding to an integrated luminosity of 25 fb-1from √s = 7 and 8 TeV pp collisions recorded by the ATLAS detector at the LHC. For a Higgs boson mass of 125.36 GeV, the ratio of the measured value to the expected value of the total production cross section times branching fraction is 1.09+0.16 -0.15(stat)+0.17 -0.14(syst). The corresponding ratios for the gluon fusion and vector-boson fusion production mechanisms are 1.02 ± 0.19(stat)+0.22 -0.18(syst) and 1.27+0.44 -0.40(stat)+0.30 -0.21(syst), respectively. At √s = 8 TeV, the total production cross sections are measured to be σ(gg→H→WW∗)=4.6±0.9(stat)+0.8 -0.7(syst) pb and σ(VBF H → WW∗)=0.51+0.17 -0.15(stat)+0.13 -0.08(syst)pb. The fiducial cross section is determined for the gluon-fusion process in exclusive final states with zero or one associated jet. © 2015 CERN, for the ATLAS Collaboration.
DOI
10.1103/PhysRevD.92.012006
WOS
WOS:000358022200001
Archivio
http://hdl.handle.net/11390/1097330
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84979800487
http://journals.aps.org/prd/abstract/10.1103/PhysRevD.92.012006
Diritti
metadata only access
Soggetti
  • HADRON COLLIDERS

  • STANDARD MODEL

  • PARTON DISTRIBUTIONS

  • MASSLESS PARTICLES

  • BROKEN SYMMETRIES

  • NNLO QCD

  • LHC

  • SEARCH

  • COLLISIONS

  • PROGRAM

Web of Science© citazioni
118
Data di acquisizione
Mar 25, 2024
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Data di acquisizione
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