An experimental study of γγ → hadrons at LEP

Buskulic, D; Debonis, I; Decamp, D; Ghez, P; Goy, C; Lees, J; Minard, M; Pietrzyk, B; Ariztizabal, F; Comas, P; Crespo, J; Delfino, M; Efthymiopoulos, I; Fernandez, E; Fernandezbosman, M; Gaitan, V; Garrido, L; Mattison, T; Pacheco, A; Padilla, C; Pascual, A; Creanza, D; Depalma, M; Farilla, A; Iaselli, G; Maggi, G; Natali, S; Nuzzo, S; Quattromini, M; Ranieri, A; Raso, G; Romano, F; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Zito, G; Chai, Y; H, H; Huang, D; Huang, X; Lin, J; Wang, T; Xie, Y; D, X; R, X; Zhang, J; Zhang, L; Zhao, W; Blucher, E; Bonvicini, G; Boudreau, J; Casper, D; Drevermann, H; Forty, R; Ganis, G; Gay, C; Hagelberg, R; Harvey, J; Hilgart, J; Jacobsen, R; Jost, B; Knobloch, J; Lehraus, I; Lohse, T; Maggi, M; Markou, C; Martinez, M; Mato, P; Meinhard, H; Minten, A; Miotto, A; Miquel, R; Moser, H; Palazzi, P; Pater, J; Perlas, J; Pusztaszeri, J; Ranjard, F; Redlinger, G; Rolandi, L; Rothberg, J; Ruan, T; Saich, M; Schlatter, D; Schmelling, M; Sefkow, F; Tejessy, W; Tomalin, I; Veenhof, R; Wachsmuth, H; Wasserbaech, S; Wiedenmann, W; Wildish, T; Witzeling, W; Wotschack, J; Ajaltouni, Z; Badaud, F; Bardadinotwinowska, M; Elfellous, R; Falvard, A; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Montret, J; Pallin, D; Perret, P; Podlyski, F; Proriol, J; Prulhiere, F; Saadi, F; Fearnley, T; Hansen, J; Hansen, J; Hansen, J; Hansen, P; Mollerud, R; Nilsson, B; Kyriakis, A; Simopoulou, E; Siotis, I; Vayaki, A; Zachariadou, K; Badier, J; Blondel, A; Bonneaud, G; Brient, J; Fouque, G; Orteu, S; Rouge, A; Rumpf, M; Tanaka, R; Verderi, M; Videau, H; Candlin, D; Parsons, M; Veitch, E; Focardi, E; Moneta, L; Parrini, G; Corden, M; Georgiopoulos, C; Ikeda, M; Levinthal, D; Antonelli, A; Baldini, R; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Cerutti, F; Chiarella, V; Dettorrepiazzoli, B; Felici, G; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, G; Passalacqua, L; Pepealtarelli, M; Picchi, P; Colrain, P; Tenhave, I; Lynch, J; Maitland, W; Morton, W; Raine, C; Reeves, P; Scarr, J; Smith, K; Smith, M; Thompson, A; Turnbull, R; Brandl, B; Braun, O; Geweniger, C; Hanke, P; Hepp, V; Kluge, E; Maumary, Y; Putzer, A; Rensch, B; Stahl, A; Tittel, K; Wunsch, M; Beuselinck, R; Binnie, D; Cameron, W; Cattaneo, M; Colling, D; Dornan, P; Greene, A; Hassard, J; Lieske, N; Moutoussi, A; Nash, J; Patton, S; Payne, D; Phillips, M; Sanmartin, G; Sedgbeer, J; Wright, A; Girtler, P; Kuhn, D; Rudolph, G; Vogl, R; Bowdery, C; Brodbeck, T; Finch, A; Foster, F; Hughes, G; Jackson, D; Keemer, N; Nuttall, M; Patel, A; Sloan, T; Snow, S; Whelan, E; Kleinknecht, K; Raab, J; Renk, B; Sander, H; Schmidt, H; Steeg, F; Walther, S; Wanke, R; Wolf, B; Bencheikh, A; Benchouk, C; Bonissent, A; Carr, J; Coyle, P; Drinkard, J; Etienne, F; Nicod, D; Papalexiou, S; Payre, P; Roos, L; Rousseau, D; Schwemling, P; Talby, M; Adlung, S; Assmann, R; Bauer, C; Blum, W; Brown, D; Cattaneo, P; Dehning, B; Dietl, H; Dydak, F; Frank, M; Halley, A; Jakobs, K; Lauber, J; Lutjens, G; Lutz, G; Manner, W; Richter, R; Schroder, J; Schwarz, A; Settles, R; Seywerd, H; Stierlin, U; Stiegler, U; Stdenis, R; Wolf, G; Alemany, R; Boucrot, J; Callot, O; Cordier, A; Davier, M; Duflot, L; Grivaz, J; Heusse, P; Jaffe, D; Janot, P; Kim, D; Lediberder, F; Lefrancois, J; Lutz, A; Schune, M; Veillet, J; Videau, I; Zhang, Z; Abbaneo, D; Bagliesi, G; Batignani, G; Bottigli, U; Bozzi, C; Calderini, G; Carpinelli, M; Ciocci, M; Dellorso, R; Ferrante, I; Fidecaro, F; Foa, L; Forti, F; Giassi, A; Giorgi, M; Gregorio, A; Ligabue, F; Lusiani, A; Mannelli, E; Marrocchesi, P; Messineo, A; Palla, F; Rizzo, G; Sanguinetti, G; Spagnolo, P; Steinberger, J; Tenchini, R; Tonelli, G; Triggiani, G; Vannini, C; Venturi, A; Verdini, P; Walsh, J; Betteridge, A; Gao, Y; Green, M; March, P; Mir, L; Medcalf, T; Quazi, I; Strong, J; West, L; Botterill, D; Clifft, R; Edgecock, T; Haywood, S; Norton, P; Thompson, J; Blochdevaux, B; Colas, P; Duarte, H; Emery, S; Kozanecki, W; Lancon, E; Lemaire, M; Locci, E; Marx, B; Perez, P; Rander, J; Renardy, J; Rosowsky, A; Roussarie, A; Schuller, J; Schwindling, J; Mohand, D; Vallage, B; Johnson, R; Litke, A; Taylor, G; Wear, J; Ashman, J; Babbage, W; Booth, C; Buttar, C; Cartwright, S; Combley, F; Dawson, I; Thompson, L; Barberio, E; Bohrer, A; Brandt, S; Cowan, G; Grupen, C; Lutters, G; Rivera, F; Schafer, U; Smolik, L; Bosisio, L; Dellamarina, R; Giannini, G; Gobbo, B; Ragusa, F; Bellantoni, L; Chen, W; Conway, J; Feng, Z; Dps, F; Gao, Y; Grahl, J; Harton, J; Hayes, O; Nachtman, J; Pan, Y; Saadi, Y; Schmitt, M; Scott, I; Sharma, V; Shi, Z; Turk, J; Walsh, A; Weber, F; Sl, W; X, X; Zheng, M; Zobernig, G

doi:10.1016/0370-2693(93)90026-E

An analysis of γγ interactions has been performed using untagged hadronic data obtained by the ALEPH detector at LEP. The data show at low transverse momentum (pt) are well reproduced by a model based on the vector meson dominance mechinism (VDM). At high pt thrust the presence of hard scattering processes is demonstrated. This component is well described in shape and normalization by a QCD calculation.

Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1993). An experimental study of γγ → hadrons at LEP. PHYSICS LETTERS. SECTION B, 313(3-4), 509-519 [10.1016/0370-2693(93)90026-E].