The decays W --> ev and Z --> e+e- are studied in ppBAR collisions at square-root s = 630 GeV. The products of production cross section and branching ratio are measured as sigma(W)e = 682 +/- 12 +/- 40 pb and sigma(Z)e = 65.6 +/- 4.0 +/- 3.8 pb. The results are in good agreement with O (alpha(s)2) calculations of the production cross sections. Many systematic effects cancel in the ratio, R = 10.4 +/- 0.6(0.7) +/- 0.3, which can be used to give an indirect measurement of the total width of the W boson: GAMMA(W) = 2.10 +/- 0.13 +/- 0.09 GeV. The width gives a limit on the top quark mass, m(top) > 53 GeV (95% CL), which is independent of the top decay mode.

A MEASUREMENT OF THE W AND Z PRODUCTION CROSS-SECTIONS AND A DETERMINATION OF GAMMA-W AT THE CERN PBARP COLLIDER

CAVASINNI, VINCENZO;COSTANTINI, FLAVIO;
1992

Abstract

The decays W --> ev and Z --> e+e- are studied in ppBAR collisions at square-root s = 630 GeV. The products of production cross section and branching ratio are measured as sigma(W)e = 682 +/- 12 +/- 40 pb and sigma(Z)e = 65.6 +/- 4.0 +/- 3.8 pb. The results are in good agreement with O (alpha(s)2) calculations of the production cross sections. Many systematic effects cancel in the ratio, R = 10.4 +/- 0.6(0.7) +/- 0.3, which can be used to give an indirect measurement of the total width of the W boson: GAMMA(W) = 2.10 +/- 0.13 +/- 0.09 GeV. The width gives a limit on the top quark mass, m(top) > 53 GeV (95% CL), which is independent of the top decay mode.
Alitti, J; Ambrosini, G; Ansari, R; Autiero, D; Bareyre, P; Bertram, Ia; Blaylock, G; Bonamy, P; Borer, K; Bourliaud, M; Buskulic, D; Carboni, G; Cavalli, D; Cavasinni, Vincenzo; Cenci, P; Chollet, Jc; Conta, C; Costa, G; Costantini, Flavio; Cozzi, L; Cravero, A; Curatolo, M; Dellacqua, A; Delprete, T; Dewolf, Rs; Dilella, L; Ducros, Y; Egan, Gf; Einsweiler, Kf; Esposito, B; Fayard, L; Federspiel, A; Ferrari, R; Fraternali, M; Froidevaux, D; Fumagalli, G; Gaillard, Jm; Gainotti, F; Gildemeister, O; Gossling, C; Goggi, Vg; Grunendahl, S; Hara, K; Hellman, S; Hrivnac, J; Hufnagel, H; Hugentobler, E; Hultqvist, K; Iacopini, E; Incandela, J; Jakobs, K; Jenni, P; Kluge, Ee; Kurz, N; Lami, S; Lariccia, P; Lefebvre, M; Linssen, L; Livan, M; Lubrano, P; Magneville, C; Mandelli, L; Mapelli, L; Mazzanti, M; Meier, K; Merkel, B; Meyer, Jp; Moniez, M; Moning, R; Morganti, M; Muller, L; Munday, Dj; Nessi, M; Nessitedaldi, F; Onions, C; Pal, T; Parker, Ma; Parrour, G; Pastore, F; Pennacchio, E; Pentney, Jm; Pepe, M; Perini, L; Petridou, C; Petroff, P; Plothowbesch, H; Polesello, G; Poppleton, A; Pretzl, K; Primavera, M; Punturo, M; Repellin, Jp; Rimoldi, A; Sacchi, M; Scampoli, P; Schacher, J; Schmidt, B; Simak, V; Singh, Sl; Sondermann, V; Spiwoks, R; Stapnes, S; Talamonti, C; Tondini, F; Tovey, Sn; Tsesmelis, E; Unal, G; Valdatanappi, M; Vercesi, V; Weidberg, Ar; Wells, Ps; White, To; Wood, Dr; Wotton, Sa; Zaccone, H; Zylberstejn, A.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/174412
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