Search for excited leptons in e+ e- collisions at s**(1/2) = 161-GeV

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(1997) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 393, n° 1-2, p. 245-260 (1997)

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Abstract
A search with the DELPHI detector at LEP for excited leptons (e∗, μ∗, τ∗ and ν∗) decaying through γ, W or Z transitions is reported. The data used correspond to an integrated luminosity of 10 pb−1 at an e+e− centre-of-mass energy of 161 GeV. The search for pair produced excited leptons established the limits View the MathML source, View the MathML source, View the MathML source and View the MathML source at 95% confidence level, assuming that the SU(2) and U(1) couplings of excited leptons are in the same ratio as for normal leptons and considering both left and right-handed components. Limits corresponding to other assumptions are also given. The search for single excited lepton production established upper limits on the ratio View the MathML source of the coupling of the excited lepton to its mass.
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1997). Search for excited leptons in e+ e- collisions at s**(1/2) = 161-GeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 393(1-2), 245-260. https://doi.org/10.1016/S0370-2693(96)01618-8 (Original work published 1997)