A measurement of AFB b in lifetime tagged heavy flavour Z decays

D. Buskulic, D. Casper, I. De Bonis, D. Decamp, P. Ghez, C. Goy, J.-P. Lees, M.-N. Minard, P. Odier, B. Pietrzyk, F. Ariztizabal, M. Chmeissani, J.M. Crespo, I. Efthymiopoulos, E. Fernandez, M. Fernandez-Bosman, V. Gaitan, Ll. Garrido, M. Martinez, T. Mattison, S. Orteu, A. Pacheco, C. Padilla, F. Palla, A. Pascual, J.A. Perlas, F. Teubert, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, N. Marinelli, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chai, D. Huang, X. Huang, X. Huang, J. Lin, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, L. Zhang, W. Zhao, G. Bonvicini, J. Boudreau, P. Comas, P. Coyle, H. Drevermann, A. Engelhardt, R.W. Forty, G. Ganis, C. Gay, M. Girone, R. Hagelberg, J. Harvey, R. Jacobsen, B. Jost, J. Knobloch, I. Lehraus, M. Maggi, C. Markou, P. Mato, H. Meinhard, A. Minten, R. Miquel, P. Palazzi, J.R. Pater, P. Perrodo, J.-F. Pusztaszeri, F. Ranjard, L. Rolandi, J. Rothberg, M. Saich, D. Schlatter, M. Schmelling, W. Tejessy, I.R. Tomalin, R. Veenhof, A. Venturi, H. Wachsmuth, S. Wasserbaech, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Barres, C. Boyer, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, J.-C. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, F. Saadi, T. Fearnley, J.B. Hansen, J.D. Hansen, J.R. Hansen, P.H. Hansen, S.D. Johnson, R. Møllerud, B.S. Nilsson, A. Kyriakis, E. Simopoulou, I. Siotis, A. Vayaki, K. Zachariadou, A. Blondel, G. Bonneaud, J.C. Brient, P. Bourdon, L. Passalacqua, A. Rougé, M. Rumpf, R. Tanaka, A. Valassi, M. Verderi, H. Videau, D.J. Candlin, M.I. Parsons, E. Veitch, E. Focardi, G. Parrini, M. Corden, M. Delfino, C. Georgiopoulos, D.E. Jaffe, D. Levinthal, A. Antonelli, G. Nencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, F. Cerutti, V. Chiarella, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G.P. Murtas, M. Pepe-Altarelli, S. Salomone, P. Colrain, I. ten Have, I.G. Knowles, J.G. Lynch, W. Maitland, W.T. Morton, C. Raine, P. Reeves, J.M. Scarr, K. Smith, M.G. Smith, A.S. Thompson, S. Thorn, R.M. Turnbull, U. Becker, O. Braun, C. Geweniger, P. Hanke, V. Hepp, E.E. Kluge, A. Putzer, B. Rensch, M. Schmidt, H. Stenzel, K. Tittel, M. Wunsch, R. Beuselinck, D.M. Binnie, W. Cameron, M. Cattaneo, D.J. Colling, P.J. Dornan, J.F. Hassard, N. Konstantinidis, L. Moneta, A. Moutoussi, A. Moutoussi, J. Nash, D.G. Payne, G. San Martin, J.K. Sedgbeer, A.G. Wright, P. Girtler, D. Kuhn, G. Rudolph, R. Vogl, C.K. Bowdery, T.J. Brodbeck, A.J. Finch, F. Foster, G. Hughes, D. Jackson, N.R. Keemer, M. Nuttall, A. Patel, T. Sloan, S.W. Snow, E.P. Whelan, A. Galla, A.M. Greene, K. Kleinknecht, J. Raab, B. Renk, H.-G. Sander, H. Schmidt, S.M. Walther, R. Wanke, B. Wolf, A.M. Bencheikh, C. Benchouk, A. Bonissent, D. Calvet, J. Carr, C. Diaconu, F. Etienne, D. Nicod, P. Payre, L. Roos, D. Rousseau, P. Schwemling, M. Talby, S. Adlung, R. Assmann, C. Bauer, W. Blum, D. Brown, P. Cattaneo, B. Dehning, H. Dietl, F. Dydak, M. Frank, A.W. Halley, K. Jakobs, H. Kroha, J. Lauber, G. Lütjens, G. Lutz, W. Männer, H.-G. Moser, R. Richter, S. Schael, J. Schröder, A.S. Schwarz, R. Settles, H. Seywerd, U. Stierlin, U. Stiegler, R.St. Denis, G. Wolf, R. Alemany, J. Boucrot, O. Callot, A. Cordier, F. Courault, M. Davier, L. Duflot, J.-F. Grivaz, Ph. Heusse, P. Janot, M. Jacquet, D.W. Kimtr19, F. Le Diberder, J. Lefrançois, A.-M. Lutz, G. Musolino, I. Nikolic, H.J. Park, I.C. Park, S. Simion, M.-H. Schune, J.-J. Veillet, I. Videau, D. Abbaneo, G. Bagliesi, G. Batignani, U. Bottigli, C. Bozzi, G. Calderini, M. Carpinelli, M.A. Ciocci, V. Ciulli, R. Dell'Orso, I. Ferrante, F. Fidecaro, L. Foà, F. Forti, A. Giassi, M.A. Giorgi, A. Gregorio, F. Ligabue, A. Lusiani, P.S. Marrocchesi, E.B. Martin, A. Messineo, G. Rizzo, G. Sanguinetti, P. Spagnolo, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannin

Research article (journal) | Peer reviewed

Abstract

A new measurement of the forward-backward asymmetry in Z --> bbBAR decays is presented. Hadrons from b decays are tagged using their long lifetimes. The b quark charge and direction are reconstructed with a hemisphere charge algorithm. The asymmetry and reconstructed b hemisphere charge are measured in the 69 pb-1 of data collected by ALEPH during 1991, 1992 and 1993. They are used to extract sin2theta(w)eff, which is determined to be 0.2315 +/- 0.0016 (stat.) +/- 0.0009 (syst.), corresponding to an A(FB)b of 0.00992 +/- 0.0084 (stat.) +/- 0.0046 (stat.).

Details about the publication

JournalPhysics Letters B (Physics Letters B)
Volume335
Issue1
Page range99-108
StatusPublished
Release year1994 (31/12/1994)
Language in which the publication is writtenEnglish
DOI10.1016/0370-2693(94)91564-4
Link to the full texthttp://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-0042862944&md5=208e386181446beb1805fddc2048f341

Authors from the University of Münster

Vogl, Raimund
ZIV - Leitungsgruppe