# Search for excited leptons in e$^+$e$^-$ annihilation at $\sqrt{s}$ = 130-140 GeV

3 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
Abstract : We report on a search for the excited leptons e^*,mu^*,tau^* and nu^* in e+e- collisions at sqrt{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 e.e.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 l.l^* in the channels e.e.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
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00023155
Contributor : Sylvie Flores Connect in order to contact the contributor
Submitted on : Tuesday, February 16, 1999 - 11:42:11 AM
Last modification on : Friday, September 10, 2021 - 1:50:06 PM

### Identifiers

• HAL Id : in2p3-00023155, version 1

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### Citation

M. Acciarri, A. Adam, O. Adriani, M. Aguilar-Benitez, S. Ahlen, et al.. Search for excited leptons in e$^+$e$^-$ annihilation at $\sqrt{s}$ = 130-140 GeV. Physics Letters B, Elsevier, 1996, 370, pp.211-221. ⟨in2p3-00023155⟩

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