Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS

A search for evidence of invisible-particle decay modes of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from the standard model expectation is observed in 4.5 fb -1 (20.3 fb -1 ) of 7 (8) TeV pp collision data collected by the ATLAS exp...

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Publicado:	2014
Materias:	Colliding beam accelerators Electric breakdown Galaxies Tellurium compounds ATLAS experiment Branching ratio Confidence levels Large Hadron Collider Neutral Higgs bosons Particle decay Scattering cross section The standard model Bosons
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v112_n20_p_Aad http://hdl.handle.net/20.500.12110/paper_00319007_v112_n20_p_Aad
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00319007_v112_n20_p_Aad
record_format	dspace
spelling	paper:paper_00319007_v112_n20_p_Aad2023-06-08T14:58:09Z Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS Colliding beam accelerators Electric breakdown Galaxies Tellurium compounds ATLAS experiment Branching ratio Confidence levels Large Hadron Collider Neutral Higgs bosons Particle decay Scattering cross section The standard model Bosons A search for evidence of invisible-particle decay modes of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from the standard model expectation is observed in 4.5 fb -1 (20.3 fb -1 ) of 7 (8) TeV pp collision data collected by the ATLAS experiment. Assuming the standard model rate for ZH production, an upper limit of 75%, at the 95% confidence level is set on the branching ratio to invisible-particle decay modes of the Higgs boson at a mass of 125.5 GeV. The limit on the branching ratio is also interpreted in terms of an upper limit on the allowed dark matter-nucleon scattering cross section within a Higgs-portal dark matter scenario. Within the constraints of such a scenario, the results presented in this Letter provide the strongest available limits for low-mass dark matter candidates. Limits are also set on an additional neutral Higgs boson, in the mass range 110 <mH <400 GeV, produced in association with a Z boson and decaying to invisible particles. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v112_n20_p_Aad http://hdl.handle.net/20.500.12110/paper_00319007_v112_n20_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)
topic	Colliding beam accelerators Electric breakdown Galaxies Tellurium compounds ATLAS experiment Branching ratio Confidence levels Large Hadron Collider Neutral Higgs bosons Particle decay Scattering cross section The standard model Bosons
spellingShingle	Colliding beam accelerators Electric breakdown Galaxies Tellurium compounds ATLAS experiment Branching ratio Confidence levels Large Hadron Collider Neutral Higgs bosons Particle decay Scattering cross section The standard model Bosons Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS
topic_facet	Colliding beam accelerators Electric breakdown Galaxies Tellurium compounds ATLAS experiment Branching ratio Confidence levels Large Hadron Collider Neutral Higgs bosons Particle decay Scattering cross section The standard model Bosons
description	A search for evidence of invisible-particle decay modes of a Higgs boson produced in association with a Z boson at the Large Hadron Collider is presented. No deviation from the standard model expectation is observed in 4.5 fb -1 (20.3 fb -1 ) of 7 (8) TeV pp collision data collected by the ATLAS experiment. Assuming the standard model rate for ZH production, an upper limit of 75%, at the 95% confidence level is set on the branching ratio to invisible-particle decay modes of the Higgs boson at a mass of 125.5 GeV. The limit on the branching ratio is also interpreted in terms of an upper limit on the allowed dark matter-nucleon scattering cross section within a Higgs-portal dark matter scenario. Within the constraints of such a scenario, the results presented in this Letter provide the strongest available limits for low-mass dark matter candidates. Limits are also set on an additional neutral Higgs boson, in the mass range 110 <mH <400 GeV, produced in association with a Z boson and decaying to invisible particles.
title	Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS
title_short	Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS
title_full	Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS
title_fullStr	Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS
title_full_unstemmed	Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS
title_sort	search for invisible decays of a higgs boson produced in association with a z boson in atlas
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319007_v112_n20_p_Aad http://hdl.handle.net/20.500.12110/paper_00319007_v112_n20_p_Aad
_version_	1768543024379330560

Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS

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