Measurement of the forward-backward asymmetry in Z→bb and Z→cc

D. Decamp, B. Deschizeaux, C. Goy, J. P. Lees, M. N. Minard, R. Alemany, J. M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll Garrido, Ll M. Mir, A. Pacheco, M. G. Catanesi, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, M. MaggiS. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Ruan, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, W. B. Atwood, L. A.T. Bauerdick, F. Bird, E. Blucher, G. Bonvicini, F. Bossi, D. Brown, T. H. Burnett, H. Drevermann, R. W. Forty, C. Grab, R. Hagelberg, S. Haywood, J. Hilgart, B. Jost, M. Kasemann, J. Knobloch, A. Lacourt, E. Lançon, I. Lehraus, T. Lohse, A. Marchioro, M. Martinez, P. Mato, S. Menary, A. Minten, A. Miotto, R. Miquel, H. G. Moser, J. Nash, P. Palazzi, F. Ranjard, G. Redlinger, A. Roth, J. Rothberg, H. Rotscheidt, R. St.Denis, D. Schlatter, M. Takashima, M. Talby, W. Tejessy, H. Wachsmuth, S. Wasserbaech, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, W. Wu, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, R. El Fellous, P. Gay, P. Henrard, J. Jousset

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From a sample of 150 000 hadronic Z decays collected with the ALEPH detector at LEP, events containing prompt leptons are used to measure the forward-backward asymmetries for the channels Z→bb and Z→cc, giving the results AFBb=0.126±0.028±0.012 and AFBc=0.064±0.039±0.030. These asymmetries correspond to the value of effective electroweak mixing angle at the Z mass sin2θW(mZ2) = 0.2262±0.0053. © 1991.
Original languageEnglish
Pages (from-to)325-336
JournalPhysics Letters B
Issue number2
Publication statusPublished - 11 Jul 1991


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  • Measurement of the forward - backward asymmetry in Z ---> b anti-b and Z ---> c anti-c

    Decamp, D. (Creator), Deschizeaux, B. (Creator), Goy, C. (Creator), Lees, J. (Creator), Minard, M. (Creator), Alemany Pantebre, R. (Creator), Crespo Vicente, J. M. (Creator), Delfino Reznicek, M. C. (Creator), Fernandez, E. (Creator), Gaitan, V. (Creator), Pacheco, A. (Creator), Catanesi, M. G. (Creator), Creanza, D. (Creator), de Palma, P. M. (Contributor), Farilla, A. (Creator), Iaselli, G. (Creator), Maggi, G. (Creator), Maggi, M. (Creator), Natali, S. (Creator), Nuzzo, S. (Creator), Quattromini, M. (Creator), Ranieri, A. (Creator), Raso, G. (Creator), Romano, F. (Creator), Ruggieri, F. (Creator), Selvaggi, G. (Creator), Silvestris, L. (Creator), Tempesta, P. (Creator), Zito, G. (Creator), Gao, Y. (Creator), Hu, H. (Creator), Huang, D. (Creator), Huang, X. (Creator), Lin, J. (Creator), Lou, J. (Creator), Qiao, C. (Creator), Ruan, T. (Creator), Wang, T. (Creator), Xie, Y. (Creator), Xu, D. (Creator), Xu, R. (Creator), Zhang, J. (Creator), Zhao, W. (Creator), Atwood, W. B. (Creator), Bauerdick, L. A. T. (Creator), Bird, F. (Creator), Blucher, E. (Creator), Bonvicini, G. (Creator), Bossi, F. (Creator), Brown, D. (Creator), Burnett, T. H. (Creator), Drevermann, H. (Creator), Forty, R. W. (Creator), Grab, C. (Creator), Hagelberg, R. (Creator), Haywood, S. (Creator), Hilgart, J. (Creator), Jost, B. (Creator), Kasemann, M. (Creator), Knobloch, J. (Creator), Lacourt, A. (Creator), Lançon, E. (Contributor), Lehraus, I. (Creator), Lohse, T. (Creator), Marchioro, A. (Creator), Martinez, M. (Creator), Mato, P. (Creator), Menary, S. (Creator), Minten, A. (Creator), Miotto, A. (Creator), Miquel, R. (Creator), Moser, H. (Creator), Nash, J. (Creator), Palazzi, P. (Creator), Ranjard, F. (Creator), Redlinger, G. (Creator), Roth, A. (Creator), Rothberg, J. (Creator), Rotscheidt, H. (Creator), Schlatter, D. (Creator), Takashima, M. (Creator), Talby, M. (Creator), Tejessy, W. (Creator), Wachsmuth, H. (Creator), Wasserbaech, S. (Creator), Wheeler, S. (Creator), Wiedenmann, W. (Creator), Witzeling, W. (Creator), Wotschack, J. (Creator), Wu, W. (Creator), Ajaltouni, Z. (Creator), Bardadin-Otwinowska, M. (Creator), Falvard, A. (Creator), El Fellous, F. R. (Creator), Gay, P. (Creator), Henrard, P. (Creator), Jousset, J. (Creator), Michel, B. (Creator), Montret, J. (Creator), Pallin, D. (Creator), Perret, P. (Creator), Proriol, J. (Creator), Prulhière, F. (Contributor), Stimpfl, G. (Creator), Hansen, J. D. (Creator), Hansen, J. R. (Creator), Hansen, P. H. (Creator), Møllerud, R. (Contributor), Nielsen, E. R. (Creator), Nilsson, B. S. (Creator), Efthymiopoulos, I. (Creator), Simopoulou, E. (Creator), Vayaki, A. (Creator), Badier, J. (Creator), Blondel, A. (Creator), Bonneaud, G. (Creator), Bourotte, J. (Creator), Braems, F. (Creator), Brient, J. C. (Creator), Fouque, G. (Creator), Gamess, A. (Creator), Guirlet, R. (Creator), Orteu, S. (Creator), Rosowsky, A. (Creator), Rougé, A. (Contributor), Rumpf, M. (Creator), Tanaka, R. 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