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. Acciarri, A. Adam, O. Adriani, M. AguilarBenitez, S. Ahlen, B. Alpat, J. Alcaraz, J. Allaby, A. Aloisio, G. Alverson, M. G. Alviggi, G. Ambrosi, H. Anderhub, V. P. Andreev, T. Angelescu, D. Antreasyan, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 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

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. Lenti;
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
370
211
221
M. Acciarri;A. Adam;O. Adriani;M. AguilarBenitez;S. Ahlen;B. Alpat;J. Alcaraz;J. Allaby;A. Aloisio;G. Alverson;M. G. Alviggi;G. Ambrosi;H....espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772826
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