Search for anomalous Z → γγγ events at LEP

We have searched for anomalous Z → γγγ events with the L3 detector at LEP. No significant deviations from the expected QED e+e− → γγγ events are observed. The branching ratio upper limit for a compoite Z decaying directly into three photons is found to be 1.0 × 10−5 at 95% C.L. The branching ratio u...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1995
Materias:
Ciencias Exactas
Física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/72459
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-72459
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
Física
spellingShingle Ciencias Exactas
Física
Dova, María Teresa
L3 Collaboration
Search for anomalous Z → γγγ events at LEP
topic_facet Ciencias Exactas
Física
description We have searched for anomalous Z → γγγ events with the L3 detector at LEP. No significant deviations from the expected QED e+e− → γγγ events are observed. The branching ratio upper limit for a compoite Z decaying directly into three photons is found to be 1.0 × 10−5 at 95% C.L. The branching ratio upper limits for the process Z → γX, X → γγ are in the range of 0.4 to 1.3 × 10−5, depending on the mass and width of the scalar particle X. In the context of a model with magnetic monopoles coupling to the Z, we find BR(Z → γγγ) < 0.8 × 10−5 at 95% C.L.; this results in a lower mass limit of 510 GeV for a magnetic monopole.
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title Search for anomalous Z → γγγ events at LEP
title_short Search for anomalous Z → γγγ events at LEP
title_full Search for anomalous Z → γγγ events at LEP
title_fullStr Search for anomalous Z → γγγ events at LEP
title_full_unstemmed Search for anomalous Z → γγγ events at LEP
title_sort search for anomalous z → γγγ events at lep
publishDate 1995
url http://sedici.unlp.edu.ar/handle/10915/72459
work_keys_str_mv AT dovamariateresa searchforanomalousznngeventsatlep
AT l3collaboration searchforanomalousznngeventsatlep
bdutipo_str Repositorios
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