Publicação: Excited fermion contribution to Z(0) physics at one loop
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Elsevier B.V.
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We investigate the effects induced by excited leptons at the one-loop level in the observables measured on the Ζ 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 Ζ 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.
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Nuclear Physics B, v. 486, n. 1-2, p. 3-22, 1997.
