A search for excited leptons e*, mu*, tau* and nu(e)* in e(+)e(-)collisions at root s = 161 GeV is performed using the 10.8 pb(-1) of data collected by the L3 detector at LEP. No evidence has been found for their existence. From an analysis of the expected l*l* pair production in the channels ee gamma gamma, mu mu gamma, tau tau gamma gamma, eeWW, and nu nu gamma gamma, the lower mass limits at 95% C.L. are 79.7 GeV for e*, 79.9 GeV for mu*, 79.3 GeV for tau* and 71.2 GeV for nu(e)* assuming the same couplings as for standard leptons. From an analysis of the expected ll* single production in channels ee gamma, mu mu gamma, tau tau gamma, nu(e)eW and nu nu gamma, the upper limits on the couplings lambda/m(l*) up to m(l*) = 161 GeV are determined. (C) 1997 Published by Elsevier Science B.V.

Search for excited leptons in e(+)e(-) annihilation at root s=161 GeV / Acciarri, M., Adriani, O., Aguilarbenitez, M., Ahlen, S., Alpat, B., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alverson, G., Alviggi, M.g., Ambrosi, G., Anderhub, H., Andreev, V.p., Angelescu, T., Anselmo, F., Antreasyan, D., Arefiev, A., Azemoon, T., Aziz, T., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 401:(1997), pp. 139-149. [10.1016/S0370-2693(97)00404-8]

Search for excited leptons in e(+)e(-) annihilation at root s=161 GeV

BAGNAIA, Paolo;BARONE, Luciano Maria;FACCINI, Riccardo;FERRONI, Fernando;GENTILE, Simonetta;GIAGU, Stefano;LUCI, Claudio;ORGANTINI G;
1997

Abstract

A search for excited leptons e*, mu*, tau* and nu(e)* in e(+)e(-)collisions at root s = 161 GeV is performed using the 10.8 pb(-1) of data collected by the L3 detector at LEP. No evidence has been found for their existence. From an analysis of the expected l*l* pair production in the channels ee gamma gamma, mu mu gamma, tau tau gamma gamma, eeWW, and nu nu gamma gamma, the lower mass limits at 95% C.L. are 79.7 GeV for e*, 79.9 GeV for mu*, 79.3 GeV for tau* and 71.2 GeV for nu(e)* assuming the same couplings as for standard leptons. From an analysis of the expected ll* single production in channels ee gamma, mu mu gamma, tau tau gamma, nu(e)eW and nu nu gamma, the upper limits on the couplings lambda/m(l*) up to m(l*) = 161 GeV are determined. (C) 1997 Published by Elsevier Science B.V.
1997
01 Pubblicazione su rivista::01a Articolo in rivista
Search for excited leptons in e(+)e(-) annihilation at root s=161 GeV / Acciarri, M., Adriani, O., Aguilarbenitez, M., Ahlen, S., Alpat, B., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alverson, G., Alviggi, M.g., Ambrosi, G., Anderhub, H., Andreev, V.p., Angelescu, T., Anselmo, F., Antreasyan, D., Arefiev, A., Azemoon, T., Aziz, T., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 401:(1997), pp. 139-149. [10.1016/S0370-2693(97)00404-8]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/241667
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