New Signatures for a Light Stop at LEP2 in SUSY Models with Spontaneously Broken R-Parity

Abstract

In a class of supersymmetric models with R-parity breaking the lightest stop can have new decay modes into third generation fermions, ${\tilde{t}}_1\to b+\tau$. We show that this decay may be dominant or at least comparable to the ordinary R-parity conserving mode ${\tilde{t}}_1\to c+{\tilde{\chi }}_1^0$, where ${\tilde{\chi }}_1^0$ denotes the lightest neutralino. The new R-parity violating decay mode could provide new signatures for stop production at LEP.

uudecoded latex file, 12 pages with 3 figures included. The complete uudecoded ps paper is also available via anonymous ftp at ftp://neutrinos.uv.es/pub/papers/ps/stop1.uu

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• Two-Body Decays of the Lightest Stop in Supergravity with and without R-Parity
• Neutralino Phenomenology at LEP2 in Supersymmetry with Bilinear Breaking of R-parity
• Stop and Sbottom LSP with R-parity Violation
• The decays gluino -> stop_1 b-quark W and gluino -> stop_1 c-quark and phenomenological implications in supersymmetric theories
• Probing neutrino mass with multilepton production at the Tevatron in the simplest R-parity violation model
• Signals from R-parity violating top quark decays at LHC
• Searching for a stop-pair sample from top counting experiments at hadron colliders
• Chargino Production at an e-e- Collider