Measurement of the W-pair cross section in e+e- collisions at 172 GeV

R. Barate, D. Buskulic, D. Decamp, P. Ghez, C. Goy, J. P. Lees, A. Lucotte, M. N. Minard, J. Y. Nief, B. Pietrzyk, M. P. Casado, M. Chmeissani, P. Comas, J. M. Crespo, M. Delfino, E. Fernandez, M. Fernandez-Bosman, Ll Garrido, A. Juste, M. MartinezG. Merino, R. Miquel, Ll M. Mir, C. Padilla, I. C. Park, A. Pascual, J. A. Perlas, I. Riu, F. Sanchez, F. Teubert, A. Colaleo, D. Creanza, M. de Palma, G. Gelao, G. Iaselli, G. Maggi, M. Maggi, N. Marinelli, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, R. Alemany, A. O. Bazarko, U. Becker, P. Bright-Thomas, M. Cattaneo, F. Cerutti, G. Dissertori, H. Drevermann, R. W. Forty, M. Frank, R. Hagelberg, J. B. Hansen, J. Harvey, P. Janot, B. Jost, E. Kneringer, J. Knobloch, I. Lehraus, P. Mato, A. Minten, L. Moneta, A. Pacheco, J. F. Pusztaszeri, F. Ranjard, G. Rizzo, L. Rolandi, D. Rousseau, D. Schlatter, M. Schmitt, O. Schneider, W. Tejessy, I. R. Tomalin, H. Wachsmuth, A. Wagner, Z. Ajaltouni, A. Barres, C. Boyer, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

Abstract

The e+e- → W+W- cross section is measured in a data sample collected by ALEPH at a mean centre-of-mass energy of 172.09 GeV, corresponding to an integrated luminosity of 10.65 pb-1. Cross sections are given for the three topologies, fully leptonic, semi-leptonic and hadronic of a W-pair decay. Under the assumption that no other decay modes are present, the W-pair cross section is measured to be 11.7 ± 1.2(stat.) ± 0.3(syst.)pb. The existence of the triple gauge boson vertex of the Standard Model is clearly preferred by the data. The decay branching ratio of the W boson into hadrons is measured to be B(W → hadrons) = 67.7 ± 3.1(stat.) ± 0.7(syst.)%, allowing a determination of the CKM matrix element |Vcs = 0.98 ± 0.14(stat.) ± 0.03(syst.). © 1997 Elsevier Science B.V.
Original languageEnglish
Pages (from-to)435-444
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume415
DOIs
Publication statusPublished - 25 Dec 1997

Fingerprint Dive into the research topics of 'Measurement of the W-pair cross section in e<sup>+</sup>e<sup>-</sup> collisions at 172 GeV'. Together they form a unique fingerprint.

Cite this