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Hadron production in two-photon collisions at LEP-L3
The reaction e+ e- -> e+ e- gamma* gamma* -> e+ e- hadrons is analysed for quasi-real virtual photons using data collected by the L3 detector during the LEP high energy runs at sqrt(s) = 183 and 189 GeV. Preliminary results on the cross sections sigma(e+e- -> e+e- hadrons) and sigma(gamma g...
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Lenguaje: | eng |
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1999
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Acceso en línea: | http://cds.cern.ch/record/404990 |
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author | Csilling, Akos |
author_facet | Csilling, Akos |
author_sort | Csilling, Akos |
collection | CERN |
description | The reaction e+ e- -> e+ e- gamma* gamma* -> e+ e- hadrons is analysed for quasi-real virtual photons using data collected by the L3 detector during the LEP high energy runs at sqrt(s) = 183 and 189 GeV. Preliminary results on the cross sections sigma(e+e- -> e+e- hadrons) and sigma(gamma gamma -> hadrons) are given in the interval 5 GeV < W_{gamma gamma} < 145 GeV. The centre-of-mass energy dependence of the two-photon cross section is well described by the universal Regge parametrisation, but with a steeper rise with energy as compared to hadron-hadron cross sections. The data are also compared to the expectations of different theoretical models. To investigate diffractive processes, the elastic gamma gamma -> rho0 rho0 process and the inclusive rho0 production gamma gamma -> rho0 X are studied in the W_{gamma gamma} > 3 GeV region. In all channels a comparison is made with the Pythia and Phojet Monte Carlo generators. |
id | cern-404990 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 1999 |
record_format | invenio |
spelling | cern-4049902021-10-08T02:34:23Zhttp://cds.cern.ch/record/404990engCsilling, AkosHadron production in two-photon collisions at LEP-L3Particle Physics - ExperimentThe reaction e+ e- -> e+ e- gamma* gamma* -> e+ e- hadrons is analysed for quasi-real virtual photons using data collected by the L3 detector during the LEP high energy runs at sqrt(s) = 183 and 189 GeV. Preliminary results on the cross sections sigma(e+e- -> e+e- hadrons) and sigma(gamma gamma -> hadrons) are given in the interval 5 GeV < W_{gamma gamma} < 145 GeV. The centre-of-mass energy dependence of the two-photon cross section is well described by the universal Regge parametrisation, but with a steeper rise with energy as compared to hadron-hadron cross sections. The data are also compared to the expectations of different theoretical models. To investigate diffractive processes, the elastic gamma gamma -> rho0 rho0 process and the inclusive rho0 production gamma gamma -> rho0 X are studied in the W_{gamma gamma} > 3 GeV region. In all channels a comparison is made with the Pythia and Phojet Monte Carlo generators.The reaction e+ e- -> e+ e- gamma* gamma* -> e+ e- hadrons is analysed for quasi-real virtual photons using data collected by the L3 detector during the LEP high energy runs at sqrt(s) = 183 and 189 GeV. Preliminary results on the cross sections sigma(e+e- -> e+e- hadrons) and sigma(gamma gamma -> hadrons) are given in the interval 5 GeV < W_{gamma gamma} < 145 GeV. The centre-of-mass energy dependence of the two-photon cross section is well described by the universal Regge parametrisation, but with a steeper rise with energy as compared to hadron-hadron cross sections. The data are also compared to the expectations of different theoretical models. To investigate diffractive processes, the elastic gamma gamma -> rho0 rho0 process and the inclusive rho0 production gamma gamma -> rho0 X are studied in the W_{gamma gamma} > 3 GeV region. In all channels a comparison is made with the Pythia and Phojet Monte Carlo generators.hep-ex/9910051KFKI-1999-08-Aoai:cds.cern.ch:4049901999-10-26 |
spellingShingle | Particle Physics - Experiment Csilling, Akos Hadron production in two-photon collisions at LEP-L3 |
title | Hadron production in two-photon collisions at LEP-L3 |
title_full | Hadron production in two-photon collisions at LEP-L3 |
title_fullStr | Hadron production in two-photon collisions at LEP-L3 |
title_full_unstemmed | Hadron production in two-photon collisions at LEP-L3 |
title_short | Hadron production in two-photon collisions at LEP-L3 |
title_sort | hadron production in two-photon collisions at lep-l3 |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/404990 |
work_keys_str_mv | AT csillingakos hadronproductionintwophotoncollisionsatlepl3 |