학술논문

Measurement of the forward-backward asymmetry of charm and bottom quarks at theZ pole usingD mesons
Document Type
Article
Author
Abreu, P.Adam, W.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.Andrieux, M. L.Antilogus, P.Apel, W-D.Arnoud, Y.Åsman, B.Augustin, J-E.Augustinus, A.Baillon, P.Bambade, P.Barao, F.Barate, R.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.Blume, M.Blyth, S.Bocci, V.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.Branchini, P.Brand, K. D.Brenner, R. A.Briand, H.Bricman, 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.Camporesi, T.Canale, V.Canepa, M.Cankocak, K.Cao, F.Carena, F.Carrilho, P.Carroll, L.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.Chochula, 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.Daum, A.Dauncey, P. D.Davenport, M.Da Silva, W.Defoix, C.Dellaricca, G.Ricca, G.DellaDelpierre, P.Demaria, N.De Angelis, A.De Boeck, H.De Boer, W.De Brabandere, S.De Clereq, C.De Fez Laso, M. D. M.De La Vaissiere, C.De Lotto, B.De Min, A.De Paula, A.De Saint-Jean, C.Dijkstra, H.Di Ciaccio, L.Djama, F.Dolbeau, J.Donszelmann, M.Doroba, K.Dracos, M.Drees, J.Drees, K. -A.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.Fenyuk, A.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.Gillespie, D.Gokieli, R.Golob, B.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.Janik, R.Jarlskog, G.Jarry, P.Jean-Marie, B.Johansson, E. K.Jonsson, L.Juillot, P.Kaiser, M.Kalmus, G.Kapusta, F.Karlsson, M.Karvelas, E.Katargin, A.Katsanevas, S.Katsoufis, E. C.Keranen, R.Khomenko, B. A.Khovanski, N. M.King, B.Kjaer, N. J.Klein, H.Klovning, A.Kluit, P.Koehne, J. H.Koene, B.Kokkinias, P.Koratzinos, M.Kostioukhine, V.Kourkoumelis, C.Kouznetsov, O.Kramer, P. -H.Krammer, M.Kreuter, C.Krolikowski, J.Kronkvist, I.Krumstein, Z.Krupinski, W.Kubinec, P.Kucewicz, W.Kulka, K.Kurvinen, K.Lacasta, C.Laktineh, I.Lambropoulos, C.Lamsa, J. W.Lanccri, L.Langefeld, P.Lapin, V.Last, I.Laugier, J-P.Lauhakangas, R.Leder, G.Ledroit, F.Lefebure, V.Lemoigne, R.LeitnerNC Y.Lemonne, J.Lenzen, G.Lepeltier, V.Lesiak, T.Levy, J. M.Liko, D.Lindner, R.Lipniacka, A.Lippi, I.Loerstad, B.Lokajicek, M.Loken, J. G.Lopez-Fernandez, A.Lopez Aguera, M. A.Loukas, D.Lozano, J. J.Lutz, P.Lyons, L.Maehlum, G.Maillard, J.Maio, A.Maltezos, A.Malychev, V.Mandl, F.Marco, J.Marechal, B.Margoni, M.Marin, J-C.Mariotti, C.Markou, A.Maron, T.Martinez-Rivero, C.Martinez-Vidal, F.Marti i Garcia, S.Matorras, F.Matteuzzi, C.Matthiae, G.Mazzucato, M.Kay, M. McKay, R. McNulty, R. McMedbo, J.Meroni, C.Meyer, W. T.Michelotto, M.Migliore, E.Mikulec, I.Mirabito, L.Mitaroff, W. A.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.Navas, S.Negri, P.Nemecek, S.Neumann, W.Neumeister, N.Nicolaidou, R.Nielsen, B. S.Nikolaenko, V.Niss, P.Nomerotski, A.Normand, A.Oberschulte-Beckmann, W.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.Perevozchikov, V.Pernegger, H.Perrotta, APetridou, C.Petrolini, A.Phillips, H. T.Piana, G.Pierre, F.Pimenta, M.Plaszczynski, S.Podobrin, O.Pol, M. E.Polok, G.Poropat, P.Pozdniakov, 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.Ronjin, V.Roos, L.Rosenberg, E. I.Rosso, E.Roudeau, P.Rovelli, T.Ruckstuhl, W.Ruhlmann-Kleider, V.Ruiz, A.Saarikko, H.Sacquin, Y.Sadovsky, A.Sajot, G.Salt, J.Sanchez, J.Sannino, M.Schneider, H.Schyns, M. A. E.Sciolla, G.Scuri, F.Sedykh, Y.Segar, A. M.Seitz, A.Sekulin, R.Shellard, R. C.Siccama, I.Siegrist, P.Simonetti, S.Simonetto, F.Sisakian, A. N.Sitar, B.Skaali, T. B.Smadja, G.Smirnov, N.Smirnova, O.Smith, G. R.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.Strub, R.Stugu, B.Szczekowski, M.Szeptycka, M.Tabarelli, T.Tchikilev, O.Theodosiou, G. E.Thome, Z.Tilquin, A.Timmermans, J.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.Turleur, M-L.Tuuva, T.Tyapkin, I. A.Tyndel, M.Tzamarias, S.Ueberschaer, B.Ueberschaer, S.Ullaland, O.Valenti, G.Vallazza, E.Valls Ferrer, J. A.Vander Velde, C.Van Apeldoorn, G. W.Van Dam, P.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.Voutilainen, M.Vrba, V.Wahlen, H.Walck, C.Waldner, F.Wehr, A.Weierstall, M.Weilhammer, P.Wetherell, A. M.Wicke, D.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.Zucchelli, G. C.Zumerle, G.
Source
Zeitschrift für Physik C Particles and Fields; September 1995, Vol. 66 Issue: 3 p341-354, 14p
Subject
Language
ISSN
01709739; 14315858
Abstract
The forward-backward asymmetries for the processes  $$e^ + e^ - \to c\bar c$$ and  $$e^ + e^ - \to b\bar b$$ at theZ resonance are measured using identifiedD mesons. In 905,000 selected hadronic events, taken in 1991 and 1992 with the DEL-PHI detector at LEP, 4757D*+?D0p+ decays are reconstructed. Thec andb quark forward-backward asymmetries are determined to be: $$\begin{gathered} A_{FB}^{c\bar c} = 0.077 \pm 0.029(stat) \pm 0.012(sys), \hfill \\ A_{FB}^{b\bar b} = 0.059 \pm 0.062(stat) \pm 0.024(sys). \hfill \\ \end{gathered} $$ Constraining theb asymmetry to the value measured by DELPHI using independent analyses, the charm asymmetry is determined to be: $$A_{FB}^{c,const} = 0.068 \pm 0.027(stat) \pm 0.011(sys).$$ . This result corresponds to an effective electroweak mixing angle measured using charm quark events of: $$\sin ^2 \theta _{eff}^{lept} = 0.2307 \pm 0.0062(stat) \pm 0.0026(sys).$$