Artículo
Search for Higgs boson decays to a photon and a Z boson in pp collisions at s√=7 and 8 TeV with the ATLAS detector
Aad, G.; Abajyan, T.; Abbott, B.; Abdallah, J.; Abdel Khalek, S.; González Silva, María Laura
; Otero y Garzon, Gustavo Javier
; Piegaia, Ricardo Nestor
; Romeo, Gaston Leonardo
; Alonso, Francisco
; Anduaga, Xabier Sebastian
; Dova, Maria Teresa
; Monticelli, Fernando Gabriel
; Tripiana, Martin Fernando
; Zieminska, D.; Zimine, N. I.; Zimmermann, C.; Zimmermann, R.; Zimmermann, S.; Zimmermann, S.; Zinonos, Z.; Ziolkowski, M.; Živković, L.; Zobernig, G.; Zoccoli, A.; Nedden, M. zur; Zou, R.; Zurzolo, G.; Zutshi, V.; Zwalinski, L.; The ATLAS Collaboration
; Otero y Garzon, Gustavo Javier
; Piegaia, Ricardo Nestor
; Romeo, Gaston Leonardo
; Alonso, Francisco
; Anduaga, Xabier Sebastian
; Dova, Maria Teresa
; Monticelli, Fernando Gabriel
; Tripiana, Martin Fernando
; Zieminska, D.; Zimine, N. I.; Zimmermann, C.; Zimmermann, R.; Zimmermann, S.; Zimmermann, S.; Zinonos, Z.; Ziolkowski, M.; Živković, L.; Zobernig, G.; Zoccoli, A.; Nedden, M. zur; Zou, R.; Zurzolo, G.; Zutshi, V.; Zwalinski, L.; The ATLAS Collaboration
Fecha de publicación:
02/2013
Editorial:
Elsevier Science
Revista:
Physics Letters B
ISSN:
0370-2693
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A search is reported for a neutral Higgs boson in the decay channel H → Z γ, Z → ℓ + ℓ − ( ℓ = e, µ), using 4.5 fb − 1 of pp collisions at √ s = 7 TeV and 20.3 fb − 1 of pp collisions at √ s = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, mℓℓγ, is consistent with the Standard Model hypothesis in the investigated mass range of 120–150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120–150 GeV between 0.13 and 0.5 pb for √ s = 8 TeV at 95% confidence level.
Palabras clave:
ATLAS
,
Particle
,
Physics
,
LHC
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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción:
Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
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Articulos de INST.DE FISICA LA PLATA
Articulos de INST.DE FISICA LA PLATA
Citación
Aad, G.; Abajyan, T.; Abbott, B.; Abdallah, J.; Abdel Khalek, S.; et al.; Search for Higgs boson decays to a photon and a Z boson in pp collisions at s√=7 and 8 TeV with the ATLAS detector; Elsevier Science; Physics Letters B; 231; 23; 2-2013; 1-23
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