A measurement of the W and Z production cross sections and a determination of Γ w at the CERN [ovbar|p]p collider

• Published in: Physics letters. B 1992-02, Vol.276 (3), p.365-374
• Main Authors: Alitti, J., Amrosini, G., Ansari, R., Autiero, D., Bareyre, P., Bertram, I.A., Blaylock, G., Bonamy, P., Borer, K., Bourliaud, M., Buskulic, D., Cavalli, D., Cavasinni, V., Cenci, P., Chollet, J.C., Conta, C., Costa, G., Costantini, F., Cozzi, L., Curatolo, M., Dell'Acqua, A., DiLella, L., Ducros, Y., Egan, G.F., Einsweiler, K.F., Fayard, L., Federspiel, A., Fraternali, M., Froidevaux, D., Fumagalli, G., Gaillard, J.M., Gianotti, F., Gildemeister, O., Gössling, C., Goggi, V.G., Grünendahl, S., Hara, K., Hellman, S., Hřiv'ač, J., Hufnagel, H., Hugentobler, E., Hultqvist, K., Iacopini, E., Incandela, J., Jakobs, K., Jenni, P., Kluge, E.E., Kurz, N., Lami, S., Lariccia, P., Lefebvre, M., Lubrano, P., Magneville, C., Mazzanti, M., Meier, K., Merkel, B., Meyer, J.P., Moniez, M., Moning, R., Morganti, M., Müller, L., Munday, D.J., Onions, C., Pal, T., Parker, M.A., Parrour, G., Pastore, F., Pennacchio, E., Pentney, J.M., Pepe, M., Perini, L., Petridou, C., Petroff, P., Plothow-Besch, H., Polesello, G., Poppleton, A., Pretzl, K., Primavera, M., Punturo, M., Repellin, J.P., Rimoldi, A., Sacchi, M., Scampoli, P., Schacher, J., Schmidt, B., Šimák, V., Singh, S.L., Sondermann, V., Spiwoks, R., Stapnes, S., Tondini, F., Tovey, S.N., Tsesmelis, E., Unal, G., Valdata-Nappi, M., Vercesi, V., Weidberg, A.R., White, T.O., Wood, D.R., Zylberstejn, A.
• Format: Article
• Language: English
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(92)90333-Y

The decays W → ev and Z → e +e − are studied in [ovbar|p]p collisions at √ s=630 GeV. The products of production cross section and branching ratio are measured as σ e w =682±12±40 pb and σ e w =65.6±4.0±3.8 pb. The results are in good agreement with O(α 2 s) calculations of the production cross sections. Many systematic effects cancel in the ratio, R=10.4± 0.7 0.6±0.3, which can be used to give an indirect measurement of the total width of the W boson: Γ 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.