Total Cross Section in $\gamma\gamma$ Collisions at LEP

Total Cross Section in $\gamma\gamma$ Collisions at LEP

The reaction e+e- -> e+e- gamma* gamma* -> e+e- hadrons for quasi-real photons is studied using data from root(s) = 183 GeV up to 202 GeV. Results on the total cross sections sigma(e+e- -> e+e- hadrons) and sigma(+e- gamma* gamma* -> e+e- hadrons) are given for the two-photon centre-of-m...

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Veröffentlicht in:Physics letters. B 2001-10, Vol.519, p.33-45
Hauptverfasser: Acciarri, M., Achard, P., Adriani, O., Aguilar-Benitez, M., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M G., Ambrosi, G., Anderhub, H., Andreev, V P., Angelescu, T., Anselmo, F., Arefev, A., Azemoon, T., Aziz, T., Bagnaia, P., Bajo, A., Baksay, L., Balandras, A., Baldew, S V., Banerjee, S., Banerjee, Sw, Barczyk, A., Barillere, R., Bartalini, P., Basile, M., Batalova, N., Battiston, R., Bay, A., Becattini, F., Becker, U., Behner, F., Bellucci, L., Berbeco, R., Berdugo, J., Berges, P., Bertucci, B., Betev, B L., Bhattacharya, S., Biasini, M., Biland, A., Blaising, J J., Blyth, S C., Bobbink, G J., Bhm, A., Boldizsar, L., Borgia, B., Bourilkov, D., Bourquin, M., Braccini, S., Branson, J G., Brochu, F., Buffini, A., Buijs, A., Burger, J D., Burger, W J., Cai, X D., Capell, M., Cara Romeo, G., Carlino, G., Cartacci, a M., Casaus, J., Castellini, G., Cavallari, F., Cavallo, N., Cecchi, C., Cerrada, M., Cesaroni, F., Chamizo-Llatas, M., Chang, y H., Chaturvedi, U K., Chemarin, M., Chen, A., Chen, G., Chen, G M., Chen, H F., Chen, H S., Chiefari, G., Cifarelli, L., Cindolo, F., Civinini, C., Clare, I., Clare, R., Coignet, G., Colino, N., Costantini, S., Cotorobai, F., de La Cruz, B., Csilling, A., Cucciarelli, S., Dai, T S., van Dalen, J A., d'Alessandro, R., de Asmundis, R., Deglon, P., Degre, A., Deiters, K., Della Volpe, D.
Format: Artikel
Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:The reaction e+e- -> e+e- gamma* gamma* -> e+e- hadrons for quasi-real photons is studied using data from root(s) = 183 GeV up to 202 GeV. Results on the total cross sections sigma(e+e- -> e+e- hadrons) and sigma(+e- gamma* gamma* -> e+e- hadrons) are given for the two-photon centre-of-mass energies 5 GeV Wgammagamma 185 GeV. The total cross section of two real photons is described by a Regge parametrisation. We observe a steeper rise with the two-photon centre-of-mass energy as compared to the hadron-hadron and the photon-proton cross sections. The data are also compared to the expectations of different theoretical models.
ISSN:0370-2693
DOI:10.1016/S0370-2693(01)01072-3