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Measurement of the cross section of W-boson pair production at LEP

The cross section of W-boson pair-production is measured with the L3 detector at LEP. In a data sample corresponding to a total luminosity of 629.4 pb−1, collected at centre-of-mass energies ranging from 189 to 209 GeV, 9834 four-fermion events with W bosons decaying into hadrons or leptons are sele...

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Bibliographic Details
Published in:Physics letters. B 2004-10, Vol.600 (1-2), p.22-40
Main Authors: Arefiev, A., Bagnaia, P., Banerjee, Sw, Biland, A., Blaising, J.J., Böhm, A., Branson, J.G., Burger, W.J., Chen, G.M., Colino, N., Costantini, S., Deiters, K., della Volpe, D., Delmeire, E., Diemoz, M., van Dierendonck, D., Dova, M.T., Duda, M., El Mamouni, H., Extermann, P., Fay, J., Fedin, O., Felcini, M., Fesefeldt, H., Field, J.H., Freudenreich, K., Garcia-Abia, P., Gupta, V.K., Gutay, L.J., Hatzifotiadou, D., Hervé, A., Hirschfelder, J., Hofer, H., Kirkby, J., Kopal, M., Kraemer, R.W., Krüger, A., Landi, G., Lecomte, P., Lecoq, P., Leiste, R., Levtchenko, M., Longo, E., Luci, C., Luminari, L., Malgeri, L., Marzano, F., McNeil, R.R., Metzger, W.J., Mirabelli, G., Musicar, B., Musy, M., Nagy, S., Napolitano, M., Organtini, G., Palomares, C., Paus, C., Pauss, F., Pistolesi, E., Pothier, J., Prokofiev, D., Quartieri, J., Rahaman, M.A., Raics, P., Rancoita, P.G., Riles, K., Rosca, A., Rosenbleck, C., Roth, S., Rubio, J.A., Rykaczewski, H., Sakharov, A., Saremi, S., Salicio, J., Schegelsky, V., Shevchenko, S., Shivarov, N., Shumilov, E., Souga, C., Stoyanov, B., Swain, J.D., Tarjan, P., Taylor, L., Teyssier, D., Valente, E., Vasquez, R., Veszpremi, V., Vetlitsky, I., Villa, S., Wadhwa, M., Wang, Q., Weber, M., Wilkens, H., Wynhoff, S., Yamamoto, J., Yeh, S.C., Zalite, An, Zhang, Z.P., Zichichi, A., Zöller, M.
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Language:English
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Summary:The cross section of W-boson pair-production is measured with the L3 detector at LEP. In a data sample corresponding to a total luminosity of 629.4 pb−1, collected at centre-of-mass energies ranging from 189 to 209 GeV, 9834 four-fermion events with W bosons decaying into hadrons or leptons are selected. The total cross section is measured with a precision of 1.4% and agrees with the Standard Model expectation. Assuming charged-lepton universality, the branching fraction for hadronic W-boson decays is measured to be: Br(W→hadrons)=67.50±0.42(stat.)±0.30(syst.)%, in agreement with the Standard Model. Differential cross sections as a function of the W− production angle are also measured for the semi-leptonic channels qqeν and qqμν.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2004.08.060