Artículo
Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at s√=8 TeV with the ATLAS detector at the LHC
Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; Alconada Verzini, María Josefina
; Alonso, Francisco
; Arduh, Francisco Anuar
; Dova, Maria Teresa
; Monticelli, Fernando Gabriel
; Wahlberg, Hernan Pablo
; Otero y Garzon, Gustavo Javier
; Piegaia, Ricardo Nestor
; Reisin, Hernan Diego
; Sacerdoti, Sabrina
; Zieminska, D.; Zimine, N. I.; Zimmermann, C.; Zimmermann, S.; Zinonos, Z.; Zinser, M.; Ziolkowski, M.; Živković, L.; Zobernig, G.; Zoccoli, A.; Nedden, M. zur; Zurzolo, G.; Zwalinski, L.; The ATLAS Collaboration
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Fecha de publicación:
05/2015
Editorial:
American Physical Society
Revista:
Physical Review D: Particles, Fields, Gravitation and Cosmology
ISSN:
1550-7998
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
This paper presents a search for Higgs bosons decaying to four leptons, either electrons or muons, via one or two light exotic gauge bosons Zd, H → ZZd → 4l or H → ZdZd → 4l. The search was performed using pp collision data corresponding to an integrated luminosity of about 20 fb−1 at the center-of-mass energy of ffiffi s p ¼ 8 TeV recorded with the ATLAS detector at the Large Hadron Collider. The observed data are well described by the Standard Model prediction. Upper bounds on the branching ratio of H → ZZd → 4l and on the kinetic mixing parameter between the Zd and the Standard Model hypercharge gauge boson are set in the range ð1–9Þ × 10−5 and ð4–17Þ × 10−2 respectively, at 95% confidence level assuming the Standard Model branching ratio of H → ZZ → 4l, for Zd masses between 15 and 55 GeV. Upper bounds on the effective mass mixing parameter between the Z and the Zd are also set using the branching ratio limits in the H → ZZd → 4l search, and are in the range ð1.5–8.7Þ × 10−4 for 15 < mZd < 35 GeV. Upper bounds on the branching ratio of H → ZdZd → 4l and on the Higgs portal coupling parameter, controlling the strength of the coupling of the Higgs boson to dark vector bosons are set in the range ð2–3Þ × 10−5 and ð1–10Þ × 10−4 respectively, at 95% confidence level assuming the Standard Model Higgs boson production cross sections, for Zd masses between 15 and 60 GeV.
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Articulos de INST.DE FISICA LA PLATA
Articulos de INST.DE FISICA LA PLATA
Citación
Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Aben, R.; et al.; Search for new light gauge bosons in Higgs boson decays to four-lepton final states in pp collisions at s√=8 TeV with the ATLAS detector at the LHC; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; D 92; 5-2015; 092001
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