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.

Comments: 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