Szczegóły publikacji
Opis bibliograficzny
Multi-photon production in $e^{+}e^{-}$ collisions at $\sqrt{s}$=181-209 GeV / G. Abbiendi [et al.], M. PRZYBYCIEŃ, A. Quadt [et al.] // The European Physical Journal. C, Particles and Fields ; ISSN 1434-6044. — 2003 — vol. 26 iss. 3, s. 331–344. — Bibliogr. s. 343–344, Abstr. — Publikacja dostępna online od: 2002-11-08
Autorzy (266)
- AGHPrzybycień Mariusz
- Abbiendi Giovanni
Dane bibliometryczne
| ID BaDAP | 14009 |
|---|---|
| Data dodania do BaDAP | 2003-09-29 |
| Tekst źródłowy | URL |
| DOI | 10.1140/epjc/s2002-01074-5 |
| Rok publikacji | 2003 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | European Physical Journal, C |
Abstract
The process e(+)e(-) –> gammagamma(gamma) is studied using data collected by the OPAL detector at LEP between the years 1997 and 2000. The data set corresponds to an integrated luminosity of 672.3 pb(-1) at centre-of-mass energies lying between 181 GeV and 209 GeV. Total and differential cross-sections are determined and found to be in good agreement with the predictions of QED. Fits to the observed angular distributions are used to set limits on parameters from several models of physics beyond the Standard Model such as cut-off parameters, contact interactions of the type e(+)e(-) gammagamma, gravity in extra spatial dimensions and excited electrons. In events with three photons in the final state the mass spectrum of photon pairs is investigated. No narrow resonance X –> gammagamma is found and limits are placed on the product of the Xgamma production cross-section and branching ratio.
