Multi-photon final states in e^+e^- collisions at sqrt{s} = 130-172 GeV
| dc.creator | The OPAL Collaboration | |
| dc.creator | al, K. Ackerstaff et | |
| dc.date | 1997-09-05 | |
| dc.date.accessioned | 2026-07-07T11:46:49Z | |
| dc.date.available | 2026-07-07T11:46:49Z | |
| dc.description | The process e^+e^- -> gamma gamma (gamma) is studied using data recorded with the OPAL detector at LEP. The data sample corresponds to a total integrated luminosity of 25.38 pb^{-1} taken at centre-of-mass energies of 130-172 GeV. The measured cross-sections agree well with the expectation from QED. In a combined fit using data from all centre-of-mass energies, the angular distribution is used to obtain improved limits on the cut-off parameters: Lambda_+ > 195 GeV and Lambda_- > 210 GeV (95% CL). In addition, limits on non-standard e^+e^-gamma couplings and contact interactions, as well as a 95% CL mass limit for an excited electron, M_{e^*} > 194 GeV for an e^+e^-gamma coupling kappa = 1, are determined. | |
| dc.description | 25 pages, LaTeX. uses a4p.sty, 9 eps figures included (plus in colour), submitted to Zeit. Phys. C | |
| dc.identifier | https://arxiv.org/abs/hep-ex/9709002 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/9709002 | |
| dc.identifier | Eur.Phys.J.C1:21-30,1998 | |
| dc.identifier | doi:10.1007/s100520050059 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/202360 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Multi-photon final states in e^+e^- collisions at sqrt{s} = 130-172 GeV | |
| dc.type | text |