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

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 signifi...

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Publicado: 2015
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n1_p_Aad
http://hdl.handle.net/20.500.12110/paper_15507998_v92_n1_p_Aad
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_15507998_v92_n1_p_Aad2023-06-08T16:22:56Z Observation and measurement of Higgs boson decays to WW ∗ with the ATLAS detector 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 -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. © 2015 CERN, for the ATLAS Collaboration. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n1_p_Aad http://hdl.handle.net/20.500.12110/paper_15507998_v92_n1_p_Aad
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description 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 -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. © 2015 CERN, for the ATLAS Collaboration.
title Observation and measurement of Higgs boson decays to WW ∗ with the ATLAS detector
spellingShingle Observation and measurement of Higgs boson decays to WW ∗ with the ATLAS detector
title_short Observation and measurement of Higgs boson decays to WW ∗ with the ATLAS detector
title_full Observation and measurement of Higgs boson decays to WW ∗ with the ATLAS detector
title_fullStr Observation and measurement of Higgs boson decays to WW ∗ with the ATLAS detector
title_full_unstemmed Observation and measurement of Higgs boson decays to WW ∗ with the ATLAS detector
title_sort observation and measurement of higgs boson decays to ww ∗ with the atlas detector
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n1_p_Aad
http://hdl.handle.net/20.500.12110/paper_15507998_v92_n1_p_Aad
_version_ 1768543201485914112

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