Author/Authors :
DELPHI Collaboration، نويسنده , , P Abreu، نويسنده , , W Adam، نويسنده , , T Adye، نويسنده , , P Adzic، نويسنده , , Z Albrecht، نويسنده , , T Alderweireld، نويسنده , , G.D. Alekseev، نويسنده , , R Alemany، نويسنده , , T Allmendinger، نويسنده , , P.P. Allport، نويسنده , , S. Almehed، نويسنده , , U Amaldi، نويسنده , , N Amapane، نويسنده , , S Amato، نويسنده , , E.G Anassontzis، نويسنده , , P Andersson، نويسنده , , A Andreazza، نويسنده , , S Andringa، نويسنده , , P. Antilogus، نويسنده , , et al.، نويسنده ,
Abstract :
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 182.65 GeV and corresponding to an integrated luminosity of 53 pb−1. Based on the 770 events selected as WW candidates, the cross-section for the doubly resonant process σ(e+e−→W+W−)=15.86 ±0.69 (stat) ±0.26 (syst) pb has been measured and found to be in good agreement with the Standard Model expectation. The branching fractions of the W decay were also measured. From these a value of the CKM mixing matrix element |Vcs|=0.985±0.073 (stat)±0.025 (syst) was derived. Our previously published WW cross-section measurements and the derived measurement of mW have been revised and updated with the present cross-section measurement to yield mW=80.49±0.43(stat)±0.09(syst)±0.03(LEP) GeV/c2.
