Multi-photon production in e+e- collisions at sqrt(s) = 183 GeV
| dc.creator | The OPAL Collaboration | |
| dc.creator | al, K. Ackerstaff et | |
| dc.date | 1998-08-17 | |
| dc.date.accessioned | 2026-07-07T12:02:23Z | |
| dc.date.available | 2026-07-07T12:02:23Z | |
| dc.description | The process e+e- to gamma gamma (gamma) is studied using data recorded with the OPAL detector at LEP. The data sample corresponds to a total integrated luminosity of 56.2 pb-1 taken at a centre-of-mass energy of 183 GeV. The measured cross-section agrees well with the expectation from QED. A fit to the angular distribution is used to obtain improved limits at 95% CL on the QED cut-off parameters: Lambda+ > 233 GeV and Lambda- > 265 GeV as well as a mass limit for an excited electron, M(e*) > 227 GeV assuming equal e*egamma and eegamma couplings. No evidence for resonance production is found in the invariant mass spectrum of photon pairs. Limits are obtained for the cross-section times branching ratio for a resonance decaying into two photons. | |
| dc.description | 19 pages, LaTeX, 6 eps figures (and colour figs) included, submitted to Physics Letters | |
| dc.identifier | https://arxiv.org/abs/hep-ex/9808012 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/9808012 | |
| dc.identifier | Phys.Lett.B438:379-390,1998 | |
| dc.identifier | doi:10.1016/S0370-2693(98)01096-X | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207423 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Multi-photon production in e+e- collisions at sqrt(s) = 183 GeV | |
| dc.type | text |