Measurement of the W mass in e+e− collisions at production threshold

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ID: 269783
1997
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Abstract
In June 1996, the LEP centre-of-mass energy was raised to 161 GeV. Pair production of W bosons in e+e− collisions was observed for the first time by the LEP experiments. An integrated luminosity of 11 pb−1 was recorded in the ALEPH detector, in which WW candidate events were observed. In 6 events both Ws decay leptonically. In 16 events, one W decays leptonically, the other into hadrons. In the channel where both Ws decay into hadrons, a signal was separated from the large background by means of several multi-variate analyses. The W pair cross-section is measured to be σWW = 4.23 ± 0.73 (stat.) ± 0.19 (syst.) pb. From this cross-section, the W mass is derived within the framework of the Standard Model: mW = 80.14 ± 0.34 (stat.) ± 0.09 (syst.) ± 0.03 (LEP energy) GeV/c2
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Authors R. Barate, D. Buskulic, D. Decamp, P. Ghez, C. Goy, J.-P. Lees, Arnaud Lucotte, M.-N. Minard, J.-Y. Nief, B. Pietrzyk, M.P. Casado, Mokhtar Chmeissani, P. Comas, J.M. Crespo, Manuel Delfino, E. Fernandez, M. Fernandez-Bosman, Ll. Garrido, Aurelio Juste, M. Martinez, Ramon Miquel, Ll.M. Mir, S. Orteu, Cristobal Padilla, I.C. Park, A. Pascual, J.A. Perlas, I. Riu, F. Sanchez, F. Teubert, Anna Colaleo, D. Creanza, M. De Palma, G. Gelao, G. Iaselli, G. Maggi, M. Maggi, N. Marinelli, S. Nuzzo, A. Ranieri, Giuseppe Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, Alessia Rita Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, R. Alemany, A.O. Bazarko, U. Becker, P. Bright-Thomas, Marco Cattaneo, F. Cerutti, H. Drevermann, R.W. Forty, M. Frank, R. Hagelberg, J. Harvey, P. Janot, B. Jost, E. Kneringer, J. Knobloch, I. Lehraus, G. Lutters, P. Mato, A. Minten, L. Moneta, A. Pacheco, J.-F. Pusztaszeri, F. Ranjard, P. Rensing, Giuliana Rizzo, Luigi (Gigi) Rolandi, D. Schlatter, M. Schmitt, Olivier Schneider, W. Tejessy, I.R. Tomalin, H. Wachsmuth, A. Wagner, Z. Ajaltouni, A. Barrès, C. Boyer, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset
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Journal physics letters b
Year 1997
DOI
10.1016/s0370-2693(97)00460-7
URL
https://sciprofiles.com/publication/view/19f66566d79bf214e7e9c45c9575f436
Keywords
standard model hadrons stat production threshold decay leptonically ws decay

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