Measurement of energetic single-photon production at LEP

• Published in: Physics letters. B Vol. 346; no. 1; pp. 190 - 198
• Main Authors: Aloisio, A., Ambrosi, G., An, Q., Alkhazov, G., Baba, P.V.K.S., Bakken, J.A., Ball, R.C., Banerjee, S., Barillère, R., Bertucci, B., Bilei, G.M., Bizzarri, R., Bouwens, B., Cai, X.D., Casaus, J., Castello, R., Chaturvedi, U.K., Chen, H.F., Chen, H.S., Cifarelli, L., Clare, I., Cohn, H.O., Coignet, G., Costantini, S., D'Alessandro, R., DeNotaristefani, F., DiBitonto, D., Dionisi, C., Duhem, F., El Mamouni, H., Engler, A., Eppling, F.J., Felcini, M., Fesefeldt, H., Field, J.H., Forconi, G., Gailloud, M., Gheordanescu, N., Goldfarb, S., Goldstein, J., Guanziroli, M., Hartmann, B., Hauschildt, D., He, J.T., Ilyas, M.M., Innocente, V., Jin, B.N., Jones, L.W., Kapustinsky, J.S., Karyotakis, Y., Kim, D., Kornadt, O., Landi, G., Lee, K.Y., Le Goff, J.M., Lin, W.T., Lohmann, W., Lu, Y.S., Lubbers, J.M., Lübelsmeyer, K., Maity, M., Malinin, A., Maña, C., Mihul, A., Möller, M., Mount, R., Müller, S., Paoletti, S., Pascale, G., Pinto, J.C., Pistolesi, E., Ren, Z., Rosier-Lees, S., Rosselet, Ph, Rykaczewski, H., Santocchia, A., Sarakinos, M.E., Servoli, L., Shevchenko, S., Son, D., Spillantini, P., Sticozzi, F., Stone, H., Syed, A.A., Toker, O., Uwer, U., Valente, E., Vetlitsky, I., Viertel, G., Weber, A., Wu, S.X., Yang, C.G., Yang, G., Zaccardelli, C., Zhang, D.H., Zhou, B., Zhou, G.J., Zhou, J.F., Zhu, R.Y., Zichichi, A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 02.03.1995; Elsevier
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(95)00023-E

We describe the sample of energetic single-photon events ( E γ > 15 GeV) collected by L3 in the 1991–1993 LEP runs. The event distributions agree with expectations from the Standard Model. The data are used to constrain the ZZ γ coupling and to set an upper limit of 4.1 × 10 −6, μ B (90% C.L.) on the the magnetic moment of the τ neutrino.