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dc.date.accessioned 2019-03-20T14:22:59Z
dc.date.available 2019-03-20T14:22:59Z
dc.date.issued 1995-06-22
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/73374
dc.description.abstract 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. en
dc.format.extent 136-144 es
dc.language en es
dc.subject e+e− → γγ(γ) en
dc.subject Física es
dc.subject 91 GeV en
dc.subject lower limits en
dc.title Tests of QED at LEP energies using e+e− → γγ(γ) and e+e− → ℓ+ℓ−γγ en
dc.type Articulo es
sedici.identifier.other https://doi.org/10.1016/0370-2693(95)00527-R
sedici.identifier.issn 0370-2693 es
sedici.creator.person Dova, María Teresa es
sedici.creator.person L3 Collaboration es
sedici.subject.materias Ciencias Exactas es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Exactas es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Physics Letters B es
sedici.relation.journalVolumeAndIssue vol. 353, no. 1 es


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