Excited tau lepton contribution to $W->tau nu(tau)$ decay at the one-loop level

Details Excited tau lepton contribution to $W->tau nu(tau)$ decay at the one-loop level Excited tau lepton contribution to $W->tau nu(tau)$ decay at the one-loop level

2003-02-07

arxiv.org/abs/hep-ph/0302057v1

Mod.Phys.Lett.A17:2327-2333,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 3 figures, version to appear in Modern Physics Letters A

Scientific paper

10.1142/S0217732302008952

We evaluate the compositeness effects of tau lepton on the vertex W-tau-nu(tau) in the context of an effective Lagrangian approach. We consider that only the third family is composed and we get the corrections to the non universal lepton coupling g_(tau)/g_(e). As the experimental bounds on non universal lepton couplings in W decays are weak, we find that the excited particles contributions do not give realistic limits on the excited mass, since they lead to Lambda

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