Study of the W+W−γ process and limits on anomalous quartic gauge boson couplings at LEP

• Published in: Physics letters. B 2002-02, Vol.527 (1-2), p.29-38
• Main Authors: Alcaraz, J., Arefiev, A., Bagnaia, P., Baksay, G., Banerjee, Sw, Biland, A., Blaising, J.J., Boldizsar, L., Branson, J.G., Casaus, J., Chemarin, M., de la Cruz, B., de Asmundis, R., De Salvo, A., Dittmar, M., Dova, M.T., Engler, A., Ewers, A., Extermann, P., Favara, A., Fay, J., Fedin, O., Felcini, M., Fesefeldt, H., Fiandrini, E., Field, J.H., Forconi, G., Freudenreich, K., Ganguli, S.N., Gataullin, M., Gong, Z.F., Grimm, O., Guida, M., Gutay, L.J., Hatzifotiadou, D., Hervé, A., Hirschfelder, J., Hofer, H., Jin, B.N., Käfer, D., Kaur, M., Kim, J.K., Kirkby, J., Lebeau, M., Lecomte, P., Li, C., Linde, F.L., Liu, Z.A., Longo, E., Mans, J., Martin, J.P., Mazumdar, K., Mirabelli, G., Mohanty, G.B., Muijs, A.J.M., Musy, M., Nessi-Tedaldi, F., Niessen, T., Nisati, A., Passaleva, G., Paus, C., Pauss, F., Pensotti, S., Pierella, F., Pohl, M., Prokofiev, D.O., Raja, N., Rancoita, P.G., Ranieri, R., Rescigno, M., Riles, K., Rosca, A., Rosenbleck, C., Ruggiero, G., Sakharov, A., Sanders, M.P., Schmidt-Kaerst, S., Schmitz, D., Schopper, H., Sciacca, C., Shoutko, V., Son, D., Straessner, A., Sun, L.Z., Suter, H., Swain, J.D., Tang, X.W., Tauscher, L., Taylor, L., Tellili, B., Teyssier, D., Ting, S.M., Ulbricht, J., Viertel, G., Vorobyov, A.A., Wilkens, H., Yang, H.J., Zalite, An, Zhao, J., Zhu, G.Y.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/S0370-2693(02)01167-X

The process e+e−→W+W−γ is studied using the data collected by the L3 detector at LEP. New results, corresponding to an integrated luminosity of 427.4 pb−1 at centre-of-mass energies from 192 to 207 GeV, are presented. The W+W−γ cross sections are measured to be in agreement with Standard Model expectations. No hints of anomalous quartic gauge boson couplings are observed. Limits at 95% confidence level are derived using also the process e+e−→νν̄γγ.