Search for excited leptons at LEP

• Published in: Physics letters. B Vol. 568; no. 1-2; pp. 23 - 34
• Main Authors: Aloisio, A., Alviggi, M.G., Arefiev, A., Bagnaia, P., Bajo, A., Bellucci, L., Biglietti, M., Biland, A., Böhm, A., Boldizsar, L., Branson, J.G., Capell, M., Cartacci, A., Casaus, J., Cavallari, F., Cavallo, N., Chemarin, M., Chen, A., Chen, H.S., Chiefari, G., Cifarelli, L., de la Cruz, B., de Asmundis, R., Debreczeni, J., De Salvo, A., Diemoz, M., Dionisi, C., El Hage, A., Engler, A., Extermann, P., Fisk, I., Freudenreich, K., Garcia-Abia, P., van Gulik, R., Hansen, J.M., Hofer, H., Hohlmann, M., Käfer, D., Kim, J.K., Kirkby, J., Klimentov, A., Landi, G., Lebeau, M., Lecomte, P., Leiste, R., Liu, Z.A., Lu, Y.S., Ma, W.G., Mans, J., Mele, S., Merola, L., Meschini, M., Milcent, H., Mirabelli, G., Musy, M., Paramatti, R., Pauss, F., Pedace, M., Pensotti, S., Prokofiev, D., Ranieri, R., Ren, D., Rescigno, M., Riemann, S., Roe, B.P., Rosier-Lees, S., Rosenbleck, C., Rykaczewski, H., Saremi, S., Sanchez, E., Schäfer, C., Schegelsky, V., Schopper, H., Steuer, M., Sun, L.Z., Tang, X.W., Tauscher, L., Tellili, B., Tóth, J., Tully, C., Valente, E., Van de Walle, R.T., Veszpremi, V., Vesztergombi, G., Vetlitsky, I., Vlachos, S., Vorobyov, A.A., Wadhwa, M., Wang, Z.M., Weber, M., Wienemann, P., Wynhoff, S., Xia, L., Xu, Z.Z., Yamamoto, J., Yang, M., Zalite, An, Zhao, J., Zhu, G.Y., Zhuang, H.L.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 21-08-2003; Elsevier
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/j.physletb.2003.05.004

A search for charged and neutral excited leptons is performed in 217 pb−1 of e+e− collision data collected with the L3 detector at LEP at centre-of-mass energies from 202 up to 209 GeV. The pair- and single-production mechanisms of excited electrons, muons and taus, as well as of excited electron-, muon- and tau-neutrinos, are investigated and no signals are detected. Combining with L3 results from searches at lower centre-of-mass energies, gives improved limits on the masses and couplings of excited leptons.