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 experi...

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Detalles Bibliográficos
Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Anduaga, Xabier Sebastián, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Ciencias Exactas
higgs boson
z boson
large hadron collider
Física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78402
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78402
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
higgs boson
z boson
large hadron collider
Física
spellingShingle Ciencias Exactas
higgs boson
z boson
large hadron collider
Física
Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
Search for invisible decays of a Higgs boson produced in association with a Z boson in ATLAS
topic_facet Ciencias Exactas
higgs boson
z boson
large hadron collider
Física
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.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Anduaga, Xabier Sebastián
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
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 http://sedici.unlp.edu.ar/handle/10915/78402
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