Single and multi-photon events with missing energy in e+e- collisions at √s = 189 GeV

Single and multi-photon events with missing energy are analysed using data collected with the L3 detector at LEP at a centre-of-mass energy of 189 GeV, for a total of 176 pb<sup>-1</sup> of integrated luminosity. The cross section of the process e+e- → <math><mtext>ν</mtex...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1999
Materias:
Ciencias Exactas
Física
Fotones
large electron positron collider
supersymmetry
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/80542
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-80542
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
Fotones
large electron positron collider
supersymmetry
spellingShingle Ciencias Exactas
Física
Fotones
large electron positron collider
supersymmetry
Dova, María Teresa
L3 Collaboration
Single and multi-photon events with missing energy in e+e- collisions at √s = 189 GeV
topic_facet Ciencias Exactas
Física
Fotones
large electron positron collider
supersymmetry
description Single and multi-photon events with missing energy are analysed using data collected with the L3 detector at LEP at a centre-of-mass energy of 189 GeV, for a total of 176 pb<sup>-1</sup> of integrated luminosity. The cross section of the process e+e- → <math><mtext>ν</mtext><mtext>ν</mtext><mtext>̄</mtext></math>γ(γ) is measured and the number of light neutrino flavours is determined to be N<sub>v</sub> = 3.011±0.077 including lower energy data. Upper limits on cross sections of supersymmetric processes are set and interpretations in supersymmetric models provide improved limits on the masses of the lightest neutralino and the gravitino. Graviton-photon production in low scale gravity models with extra dimensions is searched for and limits on the energy scale of the model are set exceeding 1 TeV for two extra dimensions.
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title Single and multi-photon events with missing energy in e+e- collisions at √s = 189 GeV
title_short Single and multi-photon events with missing energy in e+e- collisions at √s = 189 GeV
title_full Single and multi-photon events with missing energy in e+e- collisions at √s = 189 GeV
title_fullStr Single and multi-photon events with missing energy in e+e- collisions at √s = 189 GeV
title_full_unstemmed Single and multi-photon events with missing energy in e+e- collisions at √s = 189 GeV
title_sort single and multi-photon events with missing energy in e+e- collisions at √s = 189 gev
publishDate 1999
url http://sedici.unlp.edu.ar/handle/10915/80542
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AT l3collaboration singleandmultiphotoneventswithmissingenergyineecollisionsats189gev
bdutipo_str Repositorios
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