Measurement of the W Mass and Width in $e^+ e^-$ Collisions at 189 GeV

The mass of the W boson is determined in e+e- collisions at LEP by the direct reconstruction of W decays in WW->qqqq and WW->lvqq events, supplemented by measurements using the kinematic properties of the leptons in the WW->lvlv decay channel. The main sample of W pairs is selected from an...

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Detalles Bibliográficos
Autores principales: Barate, R, Décamp, D, Ghez, P, Goy, C, Jézéquel, S, Lees, J P, Martin, F, Merle, E, Minard, M N, Pietrzyk, B, Alemany, R, Bravo, S, Casado, M P, Chmeissani, M, Crespo, J M, Fernández, E, Fernández-Bosman, M, Garrido, L, Graugès-Pous, E, Martínez, M, Merino, G, Miquel, R, Mir, L M, Pacheco, A, Ruiz, H, Colaleo, A, Creanza, D, De Palma, M, Iaselli, Giuseppe, Maggi, G, Maggi, M, Nuzzo, S, Ranieri, A, Raso, G, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Tricomi, A, Zito, G, Huang, X, Lin, J, Ouyang, Q, Wang, T, Xie, Y, Xu, R, Xue, S, Zhang, J, Zhang, L, Zhao, W, Abbaneo, D, Boix, G, Buchmüller, O L, Cattaneo, M, Cerutti, F, Dissertori, G, Drevermann, H, Forty, Roger W, Frank, M, Gianotti, F, Greening, T C, Halley, A W, Hansen, J B, Harvey, J, Janot, P, Jost, B, Kado, M, Lemaître, V, Maley, P, Mato, P, Minten, Adolf G, Moutoussi, A, Ranjard, F, Rolandi, Luigi, Schlatter, W D, Schmitt, M, Schneider, O, Spagnolo, P, Tejessy, W, Teubert, F, Tournefier, E, Valassi, Andrea, Ward, J J, Wright, A E, Ajaltouni, Ziad J, Badaud, F, Chazelle, G, Deschamps, O, Dessagne, S, Falvard, A, Gay, P, Guicheney, C, Henrard, P, Jousset, J, Michel, B, Monteil, S, Montret, J C, Pallin, D, Pascolo, J M, Perret, P, Podlyski, F, Hansen, J D, Hansen, J R, Hansen, P H, Nilsson, B S, Wäänänen, A, Daskalakis, G, Kyriakis, A, Markou, C, Simopoulou, Errietta, Vayaki, Anna, Blondel, A, Brient, J C, Machefert, F P, Rougé, A, Swynghedauw, M, Tanaka, R, Videau, H L, Focardi, E, Parrini, G, Zachariadou, K, Antonelli, A, Bencivenni, G, Bologna, G, Bossi, F, Campana, P, Capon, G, Chiarella, V, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, G P, Passalacqua, L, Pepé-Altarelli, M, Chalmers, M, Kennedy, J, Lynch, J G, Negus, P, O'Shea, V, Räven, B, Smith, D, Teixeira-Dias, P, Thompson, A S, Cavanaugh, R J, Dhamotharan, S, Geweniger, C, Hanke, P, Hepp, V, Kluge, E E, Leibenguth, G, Putzer, A, Tittel, K, Wannemacher, E, Werner, S, Wunsch, M, Beuselinck, R, Binnie, David M, Cameron, W, Davies, G, Dornan, Peter J, Girone, M, Marinelli, N, Nowell, J, Przysiezniak, H, Sedgbeer, J K, Thompson, J C, Thomson, E, White, R, Ghete, V M, Girtler, P, Kneringer, E, Kuhn, D, Rudolph, G, Bowdery, C K, Buck, P G, Clarke, D P, Ellis, G, Finch, A J, Foster, F, Hughes, G, Jones, R W L, Robertson, N A, Smizanska, M, Giehl, I, Hölldorfer, F, Jakobs, K, Kleinknecht, K, Kröcker, M, Müller, A S, Nürnberger, H A, Quast, G, Renk, B, Rohne, E, Sander, H G, Schmeling, S, Wachsmuth, H W, Zeitnitz, C, Ziegler, T, Bonissent, A, Carr, J, Coyle, P, Curtil, C, Ealet, A, Fouchez, D, Leroy, O, Kachelhoffer, T, Payre, P, Rousseau, D, Tilquin, A, Aleppo, M, Antonelli, M, Gilardoni, S S, Ragusa, F, Dietl, H, Ganis, G, Hüttmann, K, Lütjens, G, Mannert, C, Männer, W, Moser, H G, Schael, S, Settles, Ronald, Stenzel, H, Wiedenmann, W, Wolf, G, Azzurri, P, Boucrot, J, Callot, O, Davier, M, Duflot, L, Grivaz, J F, Heusse, P, Jacholkowska, A, Serin, L, Veillet, J J, Videau, I, De Vivie de Régie, J B, Zerwas, D, Bagliesi, G, Boccali, T, Calderini, G, Ciulli, V, Foà, L, Giassi, A, Ligabue, F, Messineo, A, Palla, Fabrizio, Rizzo, G, Sanguinetti, G, Sciabà, A, Sguazzoni, G, Tenchini, Roberto, Venturi, A, Verdini, P G, Blair, G A, Coles, J, Cowan, G D, Green, M G, Hutchcroft, D E, Jones, L T, Medcalf, T, Strong, J A, Clifft, R W, Edgecock, T R, Norton, P R, Tomalin, I R, Bloch-Devaux, B, Colas, P, Boumediene, D E, Fabbro, B, Faïf, G, Lançon, E, Lemaire, M C, Locci, E, Pérez, P, Rander, J, Renardy, J F, Rosowsky, A, Seager, P, Trabelsi, A, Tuchming, B, Vallage, B, Black, S N, Dann, J H, Loomis, C, Kim, H Y, Konstantinidis, N P, Litke, A M, McNeil, M A, Taylor, G, Booth, C N, Cartwright, S L, Combley, F, Hodgson, P N, Lehto, M H, Thompson, L F, Affholderbach, K, Böhrer, A, Brandt, S, Grupen, Claus, Hess, J, Misiejuk, A, Prange, G, Sieler, U, Borean, C, Giannini, G, Gobbo, B, He, H, Pütz, J, Rothberg, J E, Wasserbaech, S R, Armstrong, S R, Cranmer, K, Elmer, P, Ferguson, D P S, Gao, Y, González, S, Hayes, O J, Hu, H, Jin, S, Kile, J, McNamara, P A, Nielsen, J, Orejudos, W, Pan, Y B, Saadi, Y, Scott, I J, Walsh, J, Von Wimmersperg-Töller, J H, Wu, J, Wu Sau Lan, Wu, X, Zobernig, G
Lenguaje:eng
Publicado: 2000
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1007/s100520000485
http://cds.cern.ch/record/432864
Descripción
Sumario:The mass of the W boson is determined in e+e- collisions at LEP by the direct reconstruction of W decays in WW->qqqq and WW->lvqq events, supplemented by measurements using the kinematic properties of the leptons in the WW->lvlv decay channel. The main sample of W pairs is selected from an integrated luminosity of 174 pb^-1 collected with the ALEPH detector in 1998 at a centre-of-mass energy of 188.63 GeV.The combined result from all channels is mW = 80.432+-0.072(stat.)+-0.041(syst.)+-0.019(FSI)+-0.017(LEP) GeV/c^2, where FSI represents the possible effects of final state interactions in the qqqq channel. In a second two-parameter fit to the qqqq, evqq and mvqq channels, where the W mass and width are decoupled, the average W width is found to be 2.24+-0.20(stat.)+-0.13(syst.) GeV/c^2, consistent with the Standard Model prediction. The combination of the mass measurement presented in this paper together with those derived previously from the W pair cross section at 161 and 172 GeV and direct reconstruction at 172 and 183 GeV gives mW = 80.418+-0.061(stat.)+-0.038(syst.)+-0.019(FSI)+-0.017(LEP) GeV

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