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 significa...
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Autores principales: | , , , , , , , |
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2015
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/86801 |
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I19-R120-10915-86801 |
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Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
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SEDICI (UNLP) |
language |
Inglés |
topic |
Física Collisions Jets Proton–proton collisions |
spellingShingle |
Física Collisions Jets Proton–proton collisions Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration Observation and measurement of Higgs boson decays to WW∗with the ATLAS detector |
topic_facet |
Física Collisions Jets Proton–proton collisions |
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-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. |
format |
Articulo Articulo |
author |
Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
author_facet |
Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Arduh, Francisco Anuar Dova, María Teresa Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
author_sort |
Alconada Verzini, María Josefina |
title |
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 |
http://sedici.unlp.edu.ar/handle/10915/86801 |
work_keys_str_mv |
AT alconadaverzinimariajosefina observationandmeasurementofhiggsbosondecaystowwwiththeatlasdetector AT alonsofrancisco observationandmeasurementofhiggsbosondecaystowwwiththeatlasdetector AT anduagaxabiersebastian observationandmeasurementofhiggsbosondecaystowwwiththeatlasdetector AT arduhfranciscoanuar observationandmeasurementofhiggsbosondecaystowwwiththeatlasdetector AT dovamariateresa observationandmeasurementofhiggsbosondecaystowwwiththeatlasdetector AT monticellifernandogabriel observationandmeasurementofhiggsbosondecaystowwwiththeatlasdetector AT wahlberghernanpablo observationandmeasurementofhiggsbosondecaystowwwiththeatlasdetector AT theatlascollaboration observationandmeasurementofhiggsbosondecaystowwwiththeatlasdetector |
bdutipo_str |
Repositorios |
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1764820489354608641 |