We report on a search for the excited leptons e*, mu*, tau* and nu* in e(+)e(-) collisions at root s = 130-140 GeV using the L3 detector at LEP. No evidence has been found for their existence. From an analysis of the expected pair produced l*l* in the channels ee gamma gamma, mu mu gamma gamma, tau tau gamma gamma, eeWW, and nu nu gamma gamma, We determine the lower mass limits at 95% C.L. of 64.7 GeV for e*, 64.9 GeV for mu*, 64.2 GeV for tau*, 57.3 GeV (eW decay mode) and 61.4 GeV (nu gamma decay mode) for nu*. From an analysis of the expected singly produced ll* in the channels ee gamma, mu mu gamma, tau tau gamma, nu eW and nu nu gamma, we determine upper limits on the couplings lambda/m(l*) up to m(l*) = 130 GeV.

Search for excited leptons in e(+)e(-) annihilation at root S=130-140 GeV / M., A., A., A., O., A., M., A., S., A., B., A., J., A., J., A., A., A., G., A., M. G., A., G., A., H., A., V. P., A., T., A., D., A., A., A., T., A., T., A., Bagnaia, P., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 370:(1996), pp. 211-221. [10.1016/0370-2693(96)00045-7]

Search for excited leptons in e(+)e(-) annihilation at root S=130-140 GeV

BAGNAIA, Paolo;FACCINI, Riccardo;GENTILE, Simonetta;GIAGU, Stefano;ORGANTINI, Giovanni;
1996

Abstract

We report on a search for the excited leptons e*, mu*, tau* and nu* in e(+)e(-) collisions at root s = 130-140 GeV using the L3 detector at LEP. No evidence has been found for their existence. From an analysis of the expected pair produced l*l* in the channels ee gamma gamma, mu mu gamma gamma, tau tau gamma gamma, eeWW, and nu nu gamma gamma, We determine the lower mass limits at 95% C.L. of 64.7 GeV for e*, 64.9 GeV for mu*, 64.2 GeV for tau*, 57.3 GeV (eW decay mode) and 61.4 GeV (nu gamma decay mode) for nu*. From an analysis of the expected singly produced ll* in the channels ee gamma, mu mu gamma, tau tau gamma, nu eW and nu nu gamma, we determine upper limits on the couplings lambda/m(l*) up to m(l*) = 130 GeV.
1996
01 Pubblicazione su rivista::01a Articolo in rivista
Search for excited leptons in e(+)e(-) annihilation at root S=130-140 GeV / M., A., A., A., O., A., M., A., S., A., B., A., J., A., J., A., A., A., G., A., M. G., A., G., A., H., A., V. P., A., T., A., D., A., A., A., T., A., T., A., Bagnaia, P., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 370:(1996), pp. 211-221. [10.1016/0370-2693(96)00045-7]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/472637
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