Excited fermion contribution to Z0 physics at one loop

We investigate the effects induced by excited leptons at the one-loop level in the observables measured on the Z peak at LEP. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to both oblique parameters and Z partial widths...

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Bibliographic Details
Published inNuclear physics. B Vol. 486; no. 1; pp. 3 - 22
Main Authors Gonzalez-Garcia, M.C., Novaes, S.F.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.1997
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Summary:We investigate the effects induced by excited leptons at the one-loop level in the observables measured on the Z peak at LEP. Using a general effective Lagrangian approach to describe the couplings of the excited leptons, we compute their contributions to both oblique parameters and Z partial widths. Our results show that the new effects are comparable to the present experimental sensitivity, but they do not lead to a significant improvement on the available constraints on the couplings and masses of these states.
ISSN:0550-3213
1873-1562
DOI:10.1016/S0550-3213(96)00651-7