Tau Lepton Mixing with Charginos and its Effects on Chargino Searches at e+e- Colliders

Details Tau Lepton Mixing with Charginos and its Effects on Chargino Searches at e+e- Colliders Tau Lepton Mixing with Charginos and its Effects on Chargino Searches at e+e- Colliders

1998-06-16

arxiv.org/abs/hep-ph/9806382v1

Phys.Lett.B441:224-234,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages (including 7 figures), LaTex, uses axodraw.sty (included)

Scientific paper

10.1016/S0370-2693(98)01191-5

In bilinear R-Parity violating models where a term \epsilon_3L_3H_2 is introduced in the superpotential, the tau lepton can mix with charginos. We show that this mixing is fully compatible with LEP1 precision measurements of the Z\tau\tau and W\tau\nu_\tau couplings even for large values of \epsilon_3 and of the induced vacuum expectation value v_3 of the tau-sneutrino. The single production of charginos at e+e- colliders is possible in this case and we present numerical values of the cross-section at LEP1, LEP2 and an NLC. We find maximum values of 10 pb at LEP1 and 1 fb at NLC, while the corresponding values at LEP2 are too small to observe.

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