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Tau lepton mixing with charginos and its effects on chargino searches at e(+)e(-) colliders

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Tau lepton mixing with charginos and its effects on chargino searches at e(+)e(-) colliders

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Akeroyd, A.G.; Díaz, Marco Aurelio; Furtado Valle, José Wagner

This document is a artículoDate1998

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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