Measurement of the mass and width of the W boson in e+e- collisions at √s = 189 GeV

Abreu, P; Adam, W; Adye, T; Adzic, P; Albrecht, Z; Alderweireld, T; Alekseev, G; Alemany, R; Allmendinger, T; Allport, P; Almehed, S; Amaldi, U; Amapane, N; Amato, S; Anashkin, E; Anassontzis, E; Andersson, P; Andreazza, A; Andringa, S; Anjos, N; Antilogus, P; Apel, W; Arnoud, Y; Asman, B; Augustin, J; Augustinus, A; Baillon, P; Ballestrero, A; Bambade, P; Barao, F; Barbiellini, G; Barbier, R; Bardin, D; Barker, G; Baroncelli, A; Battaglia, M; Baubillier, M; Becks, K; Begalli, M; Behrmann, A; Bellunato, T; Belokopytov, Y; Belous, K; Benekos, N; Benvenuti, A; Berat, C; Berggren, M; Berntzon, L; Bertrand, D; Besancon, M; Besson, N; Bilenky, M; Bloch, D; Blom, H; Bol, L; Bonesini, M; Boonekamp, M; Booth, P; Borisov, G; Bosio, C; Botner, O; Boudinov, E; Bouquet, B; Bowcock, T; Boyko, I; Bozovic, I; Bracko, M; Branchini, P; Brenner, R; Bruckman, P; Brunet, J; Bugge, L; Buschmann, P; Caccia, M; Calvi, M; Camporesi, T; Canale, V; Carena, F; Carroll, L; Caso, C; Gimenez, M; Cattai, A; Cavallo, F; 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Zimin, N; Zintchenko, A; Zoller, P; Zumerle, G; Zupan, M

doi:10.1016/S0370-2693(01)00453-1

A measurement of the FV mass and width has been performed by the DELPHI Collaboration using the data collected during 1998. The data sample has an integrated luminosity of 155 pb(-1) and an average centre-of-mass energy of 188.6 GeV. Results are obtained by applying the method of direct reconstruction of the mass of the W from its decay products in both the W+W- --> l (v) over bar (l)q (q) over bar ' and W+W- --> q (q) over bar '(q) over barq ' channels. The W mass result for the 1998 data set is M-W = 80.387 +/- 0.087(stat) +/- 0.034(syst) +/- 0.017(LEP) +/- 0.035(FSI) GeV/c(2), where FSI represents the uncertainty due to final state interaction effects in the q (q) over bar 'q (q) over bar ' channel, and LEP represents that arising from the knowledge of the beam energy of the accelerator Combining this result with Ghost: previously published by the DELPHI Collaboration gives the result M-W = 80.359 +/- 0.074(stat) +/- 0.032(syst) +/- 0.017(LEP) +/- 0.033(FSI) GeV/c(2). The combined value for the W width is Gamma (W) = 2.266 +/- 0.176(stat) +/- 0.056(syst) +/- 0.052(FSI) GeV/c(2). (C) 2001 Elsevier Science B.V. All rights reserved

Abreu, P., Adam, W., Adye, T., Adzic, P., Albrecht, Z., Alderweireld, T., et al. (2001). Measurement of the mass and width of the W boson in e+e- collisions at √s = 189 GeV. PHYSICS LETTERS. SECTION B, 511(2-4), 159-177 [10.1016/S0370-2693(01)00453-1].