The production of W+W− pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 182.7 GeV, corresponding to an integrated luminosity of 57 pb−1. Cross sections are given for different topologies of W decays into leptons or hadrons. Under Standard Model assumptions for the W-pair production and decay, the W-pair cross section is measured to be View the MathML source Using also the W-pair data samples collected by ALEPH at lower centre-of-mass energies, the decay branching ratio of the W boson into hadrons is measured to be View the MathML source, allowing a determination of the CKM matrix element View the MathML source. The agreement of the cross sections with the Standard Model prediction allows a limit to be set on the W decay rate to undetectable final states.

Measurement of W-pair production in e+e− collisions at 183 GeV / R. Barate, D. Decamp, P. Ghez, C. Goy, S. Jezequel, J.-P. Lees, F. Martin, E. Merle, M.-N. Minard, B. Pietrzyk, R. Alemany, M.P. Casado, M. Chmeissani, J.M. Crespo, E. Fernandez, M. Fernandez-Bosman, Ll. Garrido, E. Graugès, A. Juste, M. Martinez, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 453:(1999), pp. 107-120. [10.1016/S0370-2693(99)00304-4]

Measurement of W-pair production in e+e− collisions at 183 GeV

FOCARDI, ETTORE;CIULLI, VITALIANO;
1999

Abstract

The production of W+W− pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 182.7 GeV, corresponding to an integrated luminosity of 57 pb−1. Cross sections are given for different topologies of W decays into leptons or hadrons. Under Standard Model assumptions for the W-pair production and decay, the W-pair cross section is measured to be View the MathML source Using also the W-pair data samples collected by ALEPH at lower centre-of-mass energies, the decay branching ratio of the W boson into hadrons is measured to be View the MathML source, allowing a determination of the CKM matrix element View the MathML source. The agreement of the cross sections with the Standard Model prediction allows a limit to be set on the W decay rate to undetectable final states.
1999
453
107
120
R. Barate;D. Decamp;P. Ghez;C. Goy;S. Jezequel;J.-P. Lees;F. Martin;E. Merle;M.-N. Minard;B. Pietrzyk;R. Alemany;M.P. Casado;M. Chmeissan...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/639919
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