Mass limits for excited electrons and muons from Z\u3csup\u3e0\u3c/sup\u3e decay

Adeva, B; Adriani, O; Aguilar-Benitez, M; Akbari, H; Alcaraz, J; Aloisio, A; Alverson, G; Alviggi, M G; An, Q; Anderhub, H; Anderson, A L; Andreev, V P; Angelov, T H; Antonov, L; Antreasyan, D; Arce, P; Arefiev, A; Azemoon, T; Aziz, T; Baba, P VKS; Bagnaia, P; Bakken, J A; Baksay, L; Ball, RC; Banerjee, S; Bao, J; Barone, L; Bay, A; Becker, U; Behrens, J; Beingessner, S; Bencze, Gy L; Berdugo, J; Berges, P; Bertucci, B; Betev, B L; Biland, A; Bizzarri, R; Blaising, J J; Blumenfeld, B; Blömeke, P; Bobbink, G J; Bocciolini, M; Borgia, B; Bourilkov, D; Böhlen, W; Böhm, A; Böhringer, T; Leijtens, XJM Xaveer

Mass limits for excited electrons and muons from Z\u3csup\u3e0\u3c/sup\u3e decay

Abstract

\u3cp\u3eWe searched for excited electrons and muons from Z\u3csup\u3e0\u3c/sup\u3e 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\u3csup\u3e*\u3c/sup\u3e is 45.0 GeV and for μ\u3csup\u3e*\u3c/sup\u3e 45.3 GeV. The upper limits of ℓℓ\u3csup\u3e*\u3c/sup\u3eZ\u3csup\u3e0\u3c/sup\u3e and ℓℓ\u3csup\u3e*\u3c/sup\u3eγ couplings at 95% CL have been determined up to m\u3csub\u3eℓ*\u3c/sub\u3e close to the Z\u3csup\u3e0\u3c/sup\u3e mass.\u3c/p\u3

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Last time updated on 18/04/2019