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Measurements of the $b\overline{b}$ production cross section and forward-backward asymmetry at centre-of-mass energies above the Z pole at LEP

The measurements of R/sub b/= sigma (e/sup +/e/sup -/ to bb)/ sigma (e/sup +/e/sup -/ to qq) and of the b quark forward-backward charge asymmetry, A/sub fb//sup b/, at centre-of-mass energies above the Z pole are described. The measurement of R/sub b/ is performed at square root (s) between 130 and...

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Detalles Bibliográficos
Autores principales: Acciarri, M, Achard, P, Adriani, O, Aguilar-Benítez, M, Alcaraz, J, Alemanni, G, Allaby, James V, 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, Barczyk, A, Barillère, R, Barone, L, Bartalini, P, Basile, M, 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, Gerjan J, Böhm, A, Boldizsar, L, Borgia, B, Bourilkov, D, Bourquin, Maurice, Braccini, S, Branson, J G, Brigljevic, V, Brochu, F, Buffini, A, Buijs, A, Burger, J D, Burger, W J, Cai, X D, Campanelli, M, 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, Luisa, Cindolo, F, Civinini, C, Clare, I, Clare, R, Coignet, G, Colino, N, Costantini, S, Cotorobai, F, Cozzoni, B, de la Cruz, B, Csilling, Akos, Cucciarelli, S, Dai, T S, van Dalen, J A, D'Alessandro, R, De Asmundis, R, Déglon, P L, Degré, A, Deiters, K, Della Volpe, D, Delmeire, E, Denes, P, De Notaristefani, F, De Salvo, A, Diemoz, M, Dierckxsens, M, Van Dierendonck, D N, Di Lodovico, F, Dionisi, C, Dittmar, Michael, Dominguez, A, Doria, A, Dova, M T, Duchesneau, D, Dufournaud, D, Duinker, P, Durán, I, El-Mamouni, H, Engler, A, Eppling, F J, Erné, F C, Extermann, Pierre, Fabre, M, Faccini, R, Falagán, M A, Falciano, S, Favara, A, Fay, J, Fedin, O, Felcini, Marta, Ferguson, T, Ferroni, F, Fesefeldt, H S, Fiandrini, E, Field, J H, Filthaut, Frank, Fisher, P H, Fisk, I, Forconi, G, Freudenreich, Klaus, Furetta, C, Galaktionov, Yu, Ganguli, S N, García-Abia, P, Gataullin, M, Gau, S S, Gentile, S, Gheordanescu, N, Giagu, S, Gong, Z F, Grenier, G, Grimm, O, Grünewald, M W, Guida, M, van Gulik, R, Gupta, V K, Gurtu, A, Gutay, L J, Haas, D, Hasan, A, Hatzifotiadou, D, Hebbeker, T, Hervé, A, Hidas, P, Hirschfelder, J, Hofer, H, Holzner, G, Hoorani, H, Hou, S R, Hu, Y, Iashvili, I, Jin, B N, Jones, L W, de Jong, P, Josa-Mutuberria, I, Khan, R A, Kaur, M, Kienzle-Focacci, M N, Kim, D, Kim, J K, Kirkby, Jasper, Kiss, D, Kittel, E W, Klimentov, A, König, A C, Kopp, A, Koutsenko, V F, Kräber, M H, Krämer, R W, Krenz, W, Krüger, A, Kunin, A, Ladrón de Guevara, P, Laktineh, I, Landi, G, Lassila-Perini, K M, Lebeau, M, Lebedev, A, Lebrun, P, Lecomte, P, Lecoq, P, Le Coultre, P, Lee, H J, Le Goff, J M, Leiste, R, Leonardi, E, Levchenko, P M, Li Chuan, Likhoded, S A, Lin, C H, Lin, W T, Linde, Frank L, Lista, L, Liu, Z A, Lohmann, W, Longo, E, Lü, Y S, Lübelsmeyer, K, Luci, C, Luckey, D, Lugnier, L, Luminari, L, Lustermann, W, Ma Wen Gan, Maity, M, Malgeri, L, Malinin, A, Maña, C, Mangeol, D J J, Mans, J, Marchesini, P A, Marian, G, Martin, J P, Marzano, F, Mazumdar, K, McNeil, R R, Mele, S, Merola, L, Meschini, M, Metzger, W J, Von der Mey, M, Mihul, A, Milcent, H, Mirabelli, G, Mnich, J, Mohanty, G B, Molnár, P, Monteleoni, B, Moulik, T, Muanza, G S, Muijs, A J M, Musy, M, Napolitano, M, Nessi-Tedaldi, F, Newman, H, Niessen, T, Nisati, A, Nowak, H, Organtini, G, Oulianov, A, Palomares, C, Pandoulas, D, Paoletti, S, Paolucci, P, Paramatti, R, Park, H K, Park, I H, Passaleva, G, Patricelli, S, Paul, T, Pauluzzi, M, Paus, C, Pauss, Felicitas, Pedace, M, Pensotti, S, Perret-Gallix, D, Petersen, B, Piccolo, D, Pierella, F, Pieri, M, Piroué, P A, Pistolesi, E, Plyaskin, V, Pohl, M, Pozhidaev, V, Postema, H, Pothier, J, Prokofiev, D O, Prokofev, D, Quartieri, J, Rahal-Callot, G, Rahaman, M A, Raics, P, Raja, N, Ramelli, R, Rancoita, P G, Raspereza, A V, Raven, G, Razis, P A, Ren, D, Rescigno, M, Reucroft, S, Riemann, S, Riles, K, Robohm, A, Rodin, J, Roe, B P, Romero, L, Rosca, A, Rosier-Lees, S, Rubio, Juan Antonio, Ruggiero, G, Ruschmeier, D, Rykaczewski, H, Saremi, S, Sarkar, S, Salicio, J, Sánchez, E, Sanders, M P, Sarakinos, M E, Schäfer, C, Shchegelskii, V, Schmidt-Kärst, S, Schmitz, D, Schopper, Herwig Franz, Schotanus, D J, Schwering, G, Sciacca, C, Sciarrino, D, Seganti, A, Servoli, L, Shevchenko, S, Shivarov, N, Shoutko, V, Shumilov, E, Shvorob, A V, Siedenburg, T, Son, D, Smith, B, Spillantini, P, Steuer, M, Stickland, D P, Stone, A, Stoyanov, B, Strässner, A, Sudhakar, K, Sultanov, G G, Sun, L Z, Suter, H, Swain, J D, Szillási, Z, Sztaricskai, T, Tang, X W, Tauscher, Ludwig, Taylor, L, Tellili, B, Timmermans, C, Ting, Samuel C C, Ting, S M, Tonwar, S C, Tóth, J, Tully, C, Tung, K L, Uchida, Y, Ulbricht, J, Valente, E, Vesztergombi, G, Vetlitskii, I, Vicinanza, D, Viertel, Gert M, Villa, S, Vivargent, M, Vlachos, S, Vodopyanov, I, Vogel, H, Vogt, H, Vorobev, I, Vorobyov, A A, Vorvolakos, A, Wadhwa, M, Wallraff, W, Wang, M, Wang, X L, Wang, Z M, Weber, A, Weber, M, Wienemann, P, Wilkens, H, Wu, S X, Wynhoff, S, Xia, L, Xu, Z Z, Yamamoto, J, Yang, B Z, Yang, C G, Yang, H J, Yang, M, Ye, J B, Yeh, S C, Zalite, A, Zalite, Yu, Zhang, Z P, Zhu, G Y, Zhu, R Y, Zichichi, A, Zilizi, G, Zoller, A
Lenguaje:eng
Publicado: 2000
Materias:
Acceso en línea:http://cds.cern.ch/record/500779
Descripción
Sumario:The measurements of R/sub b/= sigma (e/sup +/e/sup -/ to bb)/ sigma (e/sup +/e/sup -/ to qq) and of the b quark forward-backward charge asymmetry, A/sub fb//sup b/, at centre-of-mass energies above the Z pole are described. The measurement of R/sub b/ is performed at square root (s) between 130 and 189 GeV using a b-tagging method that exploits the relatively large decay length of b-hadrons. The measurement of A/sub fb//sup b/ is performed using the large statistics event sample collected at square root (s)=189 GeV with a lepton-tag analysis based on the selection of prompt muons and electrons. The results at square root (s)=189 GeV are R/sub b /=0.163+or-0.013(stat.)+or-0.005(syst.), A/sub fb//sup b /=0.61+or-0.18(stat.)+or-0.09(syst.). (22 refs).