Mass limits for excited electrons and muons from Z 0 decay

Mass limits for excited electrons and muons from Z 0 decay

We searched for excited electrons and muons from Z 0 decay in the channels ee→eeγ, ee→eeγγ, ee→(e)eγ, ee→μμγ, ee→μμγγ. using the L3 detector at LEP. The lower mass limit for e ∗ is 45.0 GeV and for μ ∗ 45.3 GeV. The upper limits of ℓℓ ∗Z 0 and ℓℓ ∗γ couplings at 95% CL have been determined up to m ℓ...

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Veröffentlicht in:Physics letters. B 1990, Vol.247 (1), p.177-184
Hauptverfasser: Alcaraz, J., Alviggi, M.G., Behrens, J., Berdugo, J., Biland, A., Blömeke, P., Böhlen, W., Böhm, A., Borgia, B., Burger, J.D., Chen, M., Chien, C.Y., Civinini, C., Clare, R., Coignet, G., Dai, T.S., Dénes, E., Dionisi, C., Dolin, R., Extermann, P., Fabbretti, R., Faber, G., Ferguson, T., Ferroni, F., Friebel, W., Gallo, E., Glaubman, M., Goujon, D., Grimes, A., Guanziroli, M., Hsu, L.S., König, A.C., Krizmanic, J., Kuhn, A., Kumar, V., Landi, G., Li, C., Li, X.G., Linnhofer, S., Luckey, D., Ludovici, L., Maire, M., Maolinbay, M., Martin, J.P., Matsuda, T., Merola, L., Meschini, M., Mi, Y., Mirabelli, G., Mnich, J., Mount, R., Newman, H., Nowak, W.D., Patricelli, S., Perrin, E., Pieri, M., Piroué, P.A., Produit, N., Read, K., Reucroft, S., Riemann, T., Röhner, M., Rose, J., Rubio, J.A., Sachwitz, M., Sartorelli, G., Sauvage, G., Savin, A., Schopper, H., Schulte, R., Schultze, K., Smirnov, N., Stöhr, B., Stone, H., Suter, H., Tang, X.W., Thenard, J.M., Tonwar, S.C., Ulbricht, J., Urbàn, L., van der Graaf, H., Viertel, G., Vikas, P., Vivargent, M., Vogt, H., Vorobyov, An.A., Vuilleumier, L., Wang, Q.F., Weber, J., Wenninger, J., Wu, R.J., Wyso̵uch, B., Yan, D.S., Yang, C.G., Yang, Q.Y., You, J.M., Zhang, D., Zhang, D.H., Zhang, Z.P., Zhu, R.Y.
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Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:We searched for excited electrons and muons from Z 0 decay in the channels ee→eeγ, ee→eeγγ, ee→(e)eγ, ee→μμγ, ee→μμγγ. using the L3 detector at LEP. The lower mass limit for e ∗ is 45.0 GeV and for μ ∗ 45.3 GeV. The upper limits of ℓℓ ∗Z 0 and ℓℓ ∗γ couplings at 95% CL have been determined up to m ℓ∗ close to the Z 0 mass.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(90)91066-K