ATLAS, Collaboration; Agustoni, Marco; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Haug, Sigve; Kabana, Sonja; Marti, Lukas; Meloni, Federico; Pretzl, Klaus-Peter; Stramaglia, Maria Elena; Stucci, Stefania; Weber, Michael (2015). Observation and measurement of Higgs boson decays to WW* with the ATLAS detector. Physical review. D - particles, fields, gravitation, and cosmology, D92(1), 012006. American Physical Society 10.1103/PhysRevD.92.012006
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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 25fb⁻¹ from √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.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Agustoni, Marco, Beck, Hans Peter, Cervelli, Alberto, Ereditato, Antonio, Haug, Sigve, Marti, Lukas, Meloni, Federico, Pretzl, Klaus-Peter, Stramaglia, Maria Elena, Stucci, Stefania, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Annette Krebs-Wegenast |
Date Deposited: |
12 Sep 2016 09:25 |
Last Modified: |
05 Dec 2022 14:58 |
Publisher DOI: |
10.1103/PhysRevD.92.012006 |
ArXiv ID: |
1412.2641 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt |
BORIS DOI: |
10.7892/boris.87672 |
URI: |
https://boris.unibe.ch/id/eprint/87672 |
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