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arXiv · hep-ph/9702386

Decays of W Bosons to Charginos and Neutralinos

J. Kalinowski·P. M. Zerwas
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Abstract

The region of the supersymmetry parameter space, in which charginos decay predominantly into sneutrinos and leptons: chi+ -> \tildeν + l+, is not excluded experimentally for small mass differences between charginos and sneutrinos. The decay sneutrinos are invisible in R-parity conserving theories since they are either the lightest supersymmetric particles or they decay primarily into the channel: neutrino + lightest neutralino. If the energy of the decay leptons is so small that they escape detection, chargino events e+e- -> chi+chi- in e+e- collisions remain invisible, eroding the excluded chargino mass range at LEP. This region of the supersymmetry parameter space can partly be covered by searching for single W events in e+e- -> W+W-$, with one W boson decaying to leptons or quark jets, but the second W boson decaying to (undetected) charginos and neutralinos.

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J. Kalinowski, P. M. Zerwas. 1997-02-22. Decays of W Bosons to Charginos and Neutralinos. https://doi.org/10.1016/s0370-2693(97)00351-1

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