Tests of QED at LEP energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ

Total and differential cross sections for the process e+e− → γγ(γ), and the total cross section for the process e+e− → γγγ, are measured at energies around 91 GeV using the data collected with the L3 detector from 1991 to 1993. We set lower limits, at 95% CL, on a contact interaction energy scale pa...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, L3 Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 1995
Materias:
Ciencias Exactas
e+e− → γγ(γ)
91 GeV
lower limits
Física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/73374
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-73374
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
e+e− → γγ(γ)
91 GeV
lower limits
Física
spellingShingle Ciencias Exactas
e+e− → γγ(γ)
91 GeV
lower limits
Física
Dova, María Teresa
L3 Collaboration
Tests of QED at LEP energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ
topic_facet Ciencias Exactas
e+e− → γγ(γ)
91 GeV
lower limits
Física
description Total and differential cross sections for the process e+e− → γγ(γ), and the total cross section for the process e+e− → γγγ, are measured at energies around 91 GeV using the data collected with the L3 detector from 1991 to 1993. We set lower limits, at 95% CL, on a contact interaction energy scale parameter Λ > 602 GeV, on the mass of an excited electron and on the QED cut-off parameters Λ+ > 149 GeV and Λ_ > 143 GeV. Upper limits are also set o branching fractions of Z decaying into γγ, π° and ηγ of 5.2 × 10−5, 5.2 × 10−5 and 7.6 × 10−5 respectively. The reactions e+e− → ℓ+ℓ−nγ (ℓ = e, μ, τ) are studied using the data collected from 1990 to 1994. The data are consistent with the QED expectations.
format Articulo
Articulo
author Dova, María Teresa
L3 Collaboration
author_facet Dova, María Teresa
L3 Collaboration
author_sort Dova, María Teresa
title Tests of QED at LEP energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ
title_short Tests of QED at LEP energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ
title_full Tests of QED at LEP energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ
title_fullStr Tests of QED at LEP energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ
title_full_unstemmed Tests of QED at LEP energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ
title_sort tests of qed at lep energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ
publishDate 1995
url http://sedici.unlp.edu.ar/handle/10915/73374
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bdutipo_str Repositorios
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