학술논문

Measurement of the forward-backward asymmetry ofe+e→Z→  $$b\bar</div>
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Document Type
Article
Author
Abreu, P.Adam, W.Adye, T.Agasi, E.Ajinenko, I.Aleksan, R.Alekseev, G. D.Allport, P. P.Almehed, S.Almeida, F. M. L.Alvsvaag, S. J.Amaldi, U.Andreazza, A.Antilogus, P.Apel, W -D.Apsimon, R. J.Arnoud, Y.Åsman, B.Augustin, J -E.Augustinus, A.Baillon, P.Bambade, P.Barao, F.Barate, R.Barbiellini, G.Bardin, D. Y.Barker, G. J.Baroncelli, A.Barring, O.Barrio, J. A.Bartl, W.Bates, M. J.Battaglia, M.Baubillier, M.Baudot, J.Becks, K -H.Begalli, M.Beilliere, P.Belokopytov, Yu.Beltran, P.Benvenuti, A. C.Berggren, M.Bertrand, D.Bianchi, F.Bigi, M.Bilenky, M. S.Billoir, P.Bjarne, J.Bloch, D.Blyth, S.Bocci, V.Bogolubov, P. N.Bolognese, T.Bonesini, M.Bonivento, W.Booth, P. S. L.Borisov, G.Bosio, C.Bostjancic, B.Bosworth, S.Botner, O.Bouquet, B.Bourdarios, C.Bowcock, T. J. V.Bozzo, M.Braibant, S.Branchini, P.Brand, K. D.Brenner, R. A.Briand, H.Brieman, C.Brillault, L.Brown, R. C. A.Bruckman, P.Brunet, J -M.Bugge, L.Buran, T.Buys, A.Caccia, M.Calvi, M.Camacho Rozas, A. J.Campion, R.Camporesi, T.Canale, V.Cankocak, K.Cao, F.Carena, F.Carrilho, P.Carroll, L.Cases, R.Caso, C.Cassio, V.Castillo Gimenez, M. V.Cattai, A.Cavallo, F. R.Cerrito, L.Chabaud, V.Chan, A.Charpentier, Ph.Chaussard, L.Chauveau, J.Checchia, P.Chelkov, G. A.Chliapnikov, P.Chorowicz, V.Chrin, J. T. M.Cindro, V.Collins, P.Contreras, J. L.Contri, R.Cortina, E.Cosme, G.Cossutti, F.Couchot, F.Crawley, H. B.Crennell, D.Crosetti, G.Cuevas Maestro, J.Czellar, S.Dahl-Jensen, E.Dahm, J.Dalmagne, B.Dam, M.Damgaard, G.Daubie, E.Daum, A.Dauncey, P. D.Davenport, M.Davies, J.Da Silva, W.Defoix, C.Della Ricca, G.Delpierre, P.Demaria, N.De Angelis, A.De Boeck, H.De Boer, W.De Brabandere, S.De Clercq, C.De Fez Laso, M. D. M.De La Vaissiere, C.De Lotto, B.De Min, A.De Paula, L.De Saint-Jean, C.Dijkstra, H.Di Ciaccio, L.Djama, F.Dolbeau, J.Donszelmann, M.Doroba, K.Dracos, M.Drees, J.Dris, M.Dufour, Y.Dupont, F.Edsall, D.Ehret, R.Ekelof, T.Ekspong, G.Elsing, M.Engel, J -P.Ershaidat, N.Santo, M. EspiritoFassouliotis, D.Feindt, M.Ferrer, A.Filippas, T. A.Firestone, A.Foeth, H.Fokitis, E.Fontanelli, F.Formenti, F.Fousset, J -L.Franek, B.Frenkiel, P.Fries, D. C.Frodesen, A. G.Fruhwirth, R.Fulda-Quenzer, F.Furstenau, H.Fuster, J.Gamba, D.Gandelman, M.Garcia, C.Garcia, J.Gaspar, C.Gasparini, U.Gavillet, Ph.Gazis, E. N.Gele, D.Gerber, J -P.Gerdyukov, L.Gillespie, D.Gokieli, R.Golob, B.Golovatyuk, V. M.Gomez Y Cadenas, J. J.Gopal, G.Gorn, L.Gorski, M.Gracco, V.Grard, F.Graziani, E.Grosdidier, G.Gunnarsson, P.Guy, J.Haedinger, U.Hahn, F.Hahn, M.Hahn, S.Haider, S.Hajduk, Z.Hakansson, A.Hallgren, A.Hamacher, K.Hao, W.Harris, F. J.Hedberg, V.Henriques, R.Hernandez, J. J.Hernando, J. A.Herquet, P.Herr, H.Hessing, T. L.Higon, E.Hilke, H. J.Hill, T. S.Holmgren, S -O.Holt, P. J.Holthuizen, D.Honore, P. F.Houlden, M.Hrubec, J.Huet, K.Hultqvist, K.Ioannou, P.Iversen, P -S.Jackson, J. N.Jacobsson, R.Jalocha, P.Jarlskog, G.Jarry, P.Jean-Marie, B.Johansson, E. K.Jonsson, L.Juillot, P.Kaiser, M.Kalmus, G.Kapusta, F.Karlsson, M.Karvelas, E.Katsanevas, S.Katsoufis, E. C.Keranen, R.Khomenko, B. A.Khovanski, N. N.King, B.Kjaer, N. J.Klein, H.Klovning, A.Kluit, P.Koch-Mehrin, A.Koehne, J. H.Koene, B.Kokkinias, P.Koratzinos, M.Korytov, A. V.Kostioukhine, V.Kourkoumelis, C.Kouznetsov, O.Kramer, P. -H.Krammer, M.Kreuter, C.Krolikowski, J.Kronkvist, I.Krupinski, W.Kucewicz, W.Kulka, K.Kurvinen, K.Lacasta, C.Laktineh, I.Lambropoulos, C.Lamsa, J. W.Lanceri, L.Langefeld, P.Lapin, V.Last, I.Laugier, J -P.Lauhakangas, R.Leder, G.Ledroit, F.Leitner, R.Lemoigne, Y.Lemonne, J.Lenzen, G.Lepeltier, V.Levy, J. M.Lieb, E.Liko, D.Lindner, R.Lipniacka, A.Lippi, I.Loerstad, B.Lokajicek, M.Loken, J. G.Lopez-Fernandez, A.Lopez Aguera, M. A.Los, M.Loukas, D.Lozano, J. J.Lutz, P.Lyons, L.Maehlum, G.Maillard, J.Maio, A.Maltezos, A.Mandl, F.Marco, J.Marechal, B.Margoni, M.Marin, J -C.Mariotti, C.Markou, A.Maron, T.Marti, S.Martinez-Rivero, C.Martinez-Vidal, F.Matorras, F.Matteuzzi, C.Matthiae, G.Mazzucato, M.Cubbin, M. McKay, R. McNulty, R. McMedbo, J.Meroni, C.Meyer, W. T.Miagkov, A.Michelotto, M.Migliore, E.Mirabito, L.Mitaroft, W. A.Mitselmakher, G. V.Mjoernmark, U.Moa, T.Moeller, R.Moenig, K.Monge, M. R.Morettini, P.Mueller, H.Murray, W. J.Muryn, B.Myatt, G.Naraghi, F.Navarria, F. L.Negri, P.Nemecek, S.Neumann, W.Neumeister, N.Nicolaidou, R.Nielsen, B. S.Nikolaenko, V.Niss, P.Nomerotski, A.Normand, A.Obraztsov, V.Olshevski, A. G.Orava, R.Osterberg, K.Ouraou, A.Paganini, P.Paganoni, M.Pain, R.Palka, H.Papadopoulou, Th. D.Pape, L.Parodi, F.Passeri, A.Pegoraro, M.Pennanen, J.Peralta, L.Pernegger, H.Pernicka, M.Perrotta, A.Petridou, C.Petrolini, A.Phillips, H. T.Piana, G.Pierre, F.Pimenta, M.Plaszczynski, S.Podobrin, O.Pol, M. E.Polok, G.Poropat, P.Pozdiniakov, V.Prest, M.Privitera, P.Pullia, A.Radojicic, D.Ragazzi, S.Rahmani, H.Rames, J.Ratoff, P. N.Read, A. L.Reale, M.Rebecchi, P.Redaelli, N. G.Regler, M.Reid, D.Renton, P. B.Resvanis, L. K.Richard, F.Richardson, J.Ridky, J.Rinaudo, G.Ripp, I.Romero, A.Roncagliolo, I.Ronchese, P.Roos, L.Rosenberg, E. I.Rosso, E.Roudeau, P.Rovelli, T.Ruckstuhl, W.Ruhlmann-Kleider, V.Ruiz, A.Saarikko, H.Sacquin, Y.Sajot, G.Salt, J.Sanchez, J.Sannino, M.Schneider, H.Schyns, M. A. E.Sciolla, G.Scuri, F.Segar, A. M.Seitz, A.Sekulin, R.Seufert, R.Shellard, R. C.Siccama, I.Siegrist, P.Simonetti, S.Simonetto, F.Sisakian, A. N.Skaali, T. B.Smadja, G.Smirnov, N.Smirnova, O.Smith, G. R.Sokolov, A.Sosnowski, R.Souza-Santos, D.Spassov, T.Spiriti, E.Squarcia, S.Staeck, H.Stanescu, C.Stapnes, S.Stavitski, I.Stavropoulos, G.Stepaniak, K.Stichelbaut, F.Stocchi, A.Strauss, J.Straver, J.Strub, R.Stugu, B.Szczekowski, M.Szeptycka, M.Tabarelli, T.Tchikilev, O.Theodosiou, G. E.Thome, Z.Tilquin, A.Timmermans, J.Timofeev, V. G.Tkatchev, L. G.Todorov, T.Toet, D. Z.Tomaradze, A.Tome, B.Torassa, E.Tortora, L.Transtromer, G.Treille, D.Trischuk, W.Tristram, G.Troncon, C.Tsirou, A.Tsyganov, E. N.Turluer, M -L.Tuuva, T.Tyapkin, I. A.Tyndel, M.Tzamarias, S.Ueberschaer, B.Ueberschaer, S.Ullaland, O.Uvarov, V.Valenti, G.Vallazza, E.Valls Ferrer, J. A.Vander Velde, C.Van Apeldoorn, G. W.Van Dam, P.Van Der Heijden, M.Van Doninck, W. K.Van Eldik, J.Vegni, G.Ventura, L.Venus, W.Verbeure, F.Verlato, M.Vertogradov, L. S.Vilanova, D.Vincent, P.Vitale, L.Vlasov, E.Vodopyanov, A. S.Vollmer, M.Voutilainen, M.Vrba, V.Wahlen, H.Walck, C.Wehr, A.Weierstall, M.Weilhammer, P.Wetherell, A. M.Wickens, J. H.Wielers, M.Wilkinson, G. R.Williams, W. S. C.Winter, M.Witek, M.Wormser, G.Woschnagg, K.Yip, K.Yushchenko, O.Zach, F.Zaitsev, A.Zalewska, A.Zalewski, P.Zavrtanik, D.Zevgolatakos, E.Zimin, N. I.Zito, M.Zontar, D.Zuberi, R.Zumerle, G.
Source
Zeitschrift für Physik C Particles and Fields; December 1995, Vol. 65 Issue: 4 p569-585, 17p
Subject
Language
ISSN
01709739; 14315858
Abstract
The forward-backward asymmetry of the processe+e-?Z?b  $$b\bar b$$ has been measured using events collected by the DELPHI experiment during the 1991 and 1992 LEP runs. This data sample corresponded to 884 000 hadronicZ decays at a centre-of-mass energy  $$\sqrt s \sim M_Z $$ . The tagging of b-quark events was performed using two approaches; the first was based on the semileptonic decay channelsb?X+µ andb?X+e, the second used a lifetime tag with jet-charge reconstruction. The results of these two methods were combined to give $$A_{FB}^{b\bar b} = 0.107 \pm 0.011(stat. + syst. + mixing).$$