First Measurement of Z/gamma* Production in Compton Scattering of Quasi-real Photons
| dc.creator | OPAL Collaboration | |
| dc.creator | al, G. Abbiendi et | |
| dc.date | 1998-08-27 | |
| dc.date.accessioned | 2026-07-07T12:02:25Z | |
| dc.date.available | 2026-07-07T12:02:25Z | |
| dc.description | We report the first observation of Z/gamma* production in Compton scattering of quasi-real photons. This is a subprocess of the reaction e+e- to e+e-Z/gamma*, where one of the final state electrons is undetected. Approximately 55 pb-1 of data collected in the year 1997 at an e+e- centre-of-mass energy of 183 GeV with the OPAL detector at LEP have been analysed. The Z/gamma* from Compton scattering has been detected in the hadronic decay channel. Within well defined kinematic bounds, we measure the product of cross-section and Z/gamma* branching ratio to hadrons to be (0.9+-0.3+-0.1) pb for events with a hadronic mass larger than 60 GeV, dominated by (e)eZ production. In the hadronic mass region between 5 GeV and 60 GeV, dominated by (e)egamma* production, this product is found to be (4.1+-1.6+-0.6) pb. Our results agree with the predictions of two Monte Carlo event generators, grc4f and PYTHIA. | |
| dc.description | 18 pages, LaTeX, 5 eps figures included, submitted to Physics Letters B | |
| dc.identifier | https://arxiv.org/abs/hep-ex/9808030 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/9808030 | |
| dc.identifier | Phys.Lett.B438:391-404,1998 | |
| dc.identifier | doi:10.1016/S0370-2693(98)01140-X | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207431 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | First Measurement of Z/gamma* Production in Compton Scattering of Quasi-real Photons | |
| dc.type | text |