W pair production cross-section and W branching fractions in e(+)e(-) interactions at 189 GeV
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W pair production cross-section and W branching fractions in e(+)e(-) interactions at 189 GeV

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W pair production cross-section and W branching fractions in e(+)e(-) interactions at 189 GeV

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DELPHI Collaboration; Alemany Fernández, Reyes; Cabrera Urbán, Susana Perfil; Castillo Giménez, María Victoria Perfil; Cortina Gil, Eduardo; Costa Mezquita, María José; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gil Botella, Inés; Hernández Rey, Juan José Perfil; Higón Rodríguez, Emilio Perfil; Oyanguren Campos, Arantza Perfil; Salt Cairols, José Perfil; Tortosa Martínez, Pablo
Aquest document és un/a article, creat/da en: 2000

Este documento está disponible también en : http://dx.doi.org/10.1016/S0370-2693(00)00314-2
The cross-section for the process e+e- -> W+W- has been measured with the data sample collected by DELPHI at an average centre-of-mass energy of 189 GeV and corresponding to an integrated luminosity of 155 pb^{-1}. Based on the 2392 events selected as WW candidates, the cross-section for the doubly resonant process e+e- -> W+W- has been measured to be 15.83 +- 0.38 (stat) +- 0.20 (syst) pb. The branching fractions of the W decay were also measured and found to be in good agreement with the Standard Model expectation. From these a value of the CKM mixing matrix element |V_{cs}| = 1.001 +- 0.040 (stat) +- 0.020 (syst) was derived.

    DELPHI Collaboration Alemany, R. Cabrera Urbán, Susana Castillo Giménez, María Victoria Cortina, E. Costa, M. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gil, I. Hernández Rey, Juan José Higón Rodríguez, Emilio Oyanguren Campos, Arantza Salt Cairols, José ,Tortosa Martínez, Pablo, 2000 W pair production cross-section and W branching fractions in e(+)e(-) interactions at 189 GeV Physics Letters B 479 1-3 89 100
http://dx.doi.org/10.1016/S0370-2693(00)00314-2
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