Evidence for the H → bb decay with the ATLAS detector

A search for the decay of the Standard Model Higgs boson into a bb pair when produced in association with a W or Z boson is performed with the ATLAS detector. The analysed data, corresponding to an integrated luminosity of 36.1 fb -1 , were collected in proton-proton collisions in Run 2 of the Large...

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Autor principal:	Aaboud, M.
Formato:	JOUR
Materias:	Hadron-Hadron scattering (experiments) Higgs physics
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n12_p1_Aaboud
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_11266708_v2017_n12_p1_Aaboud
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spelling	todo:paper_11266708_v2017_n12_p1_Aaboud2023-10-03T16:07:32Z Evidence for the H → bb decay with the ATLAS detector Aaboud, M. Hadron-Hadron scattering (experiments) Higgs physics A search for the decay of the Standard Model Higgs boson into a bb pair when produced in association with a W or Z boson is performed with the ATLAS detector. The analysed data, corresponding to an integrated luminosity of 36.1 fb -1 , were collected in proton-proton collisions in Run 2 of the Large Hadron Collider at a centre-of-mass energy of 13TeV. Final states containing zero, one and two charged leptons (electrons or muons) are considered, targeting the decays Z → νν, W → ℓν and Z → ℓℓ. For a Higgs boson mass of 125 GeV, an excess of events over the expected background from other Standard Model processes is found with an observed significance of 3.5 standard deviations, compared to an expectation of 3.0 standard deviations. This excess provides evidence for the Higgs boson decay into b-quarks and for its production in association with a vector boson. The combination of this result with that of the Run 1 analysis yields a ratio of the measured signal events to the Standard Model expectation equal to 0.90 ± 0.18(stat.) +0.21 -0.19 (syst.). Assuming the Standard Model production cross-section, the results are consistent with the value of the Yukawa coupling to b-quarks in the Standard Model. © The Author(s) 2017. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n12_p1_Aaboud
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Hadron-Hadron scattering (experiments) Higgs physics
spellingShingle	Hadron-Hadron scattering (experiments) Higgs physics Aaboud, M. Evidence for the H → bb decay with the ATLAS detector
topic_facet	Hadron-Hadron scattering (experiments) Higgs physics
description	A search for the decay of the Standard Model Higgs boson into a bb pair when produced in association with a W or Z boson is performed with the ATLAS detector. The analysed data, corresponding to an integrated luminosity of 36.1 fb -1 , were collected in proton-proton collisions in Run 2 of the Large Hadron Collider at a centre-of-mass energy of 13TeV. Final states containing zero, one and two charged leptons (electrons or muons) are considered, targeting the decays Z → νν, W → ℓν and Z → ℓℓ. For a Higgs boson mass of 125 GeV, an excess of events over the expected background from other Standard Model processes is found with an observed significance of 3.5 standard deviations, compared to an expectation of 3.0 standard deviations. This excess provides evidence for the Higgs boson decay into b-quarks and for its production in association with a vector boson. The combination of this result with that of the Run 1 analysis yields a ratio of the measured signal events to the Standard Model expectation equal to 0.90 ± 0.18(stat.) +0.21 -0.19 (syst.). Assuming the Standard Model production cross-section, the results are consistent with the value of the Yukawa coupling to b-quarks in the Standard Model. © The Author(s) 2017.
format	JOUR
author	Aaboud, M.
author_facet	Aaboud, M.
author_sort	Aaboud, M.
title	Evidence for the H → bb decay with the ATLAS detector
title_short	Evidence for the H → bb decay with the ATLAS detector
title_full	Evidence for the H → bb decay with the ATLAS detector
title_fullStr	Evidence for the H → bb decay with the ATLAS detector
title_full_unstemmed	Evidence for the H → bb decay with the ATLAS detector
title_sort	evidence for the h → bb decay with the atlas detector
url	http://hdl.handle.net/20.500.12110/paper_11266708_v2017_n12_p1_Aaboud
work_keys_str_mv	AT aaboudm evidenceforthehbbdecaywiththeatlasdetector
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Evidence for the H → bb decay with the ATLAS detector

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