Stau LSP and comparison with H ± phenomenology

In supersymmetric models with explicit breaking of R-parity the lightest supersymmetric particle (LSP) may be the lightest stau, τ̃1. Such a scenario would provide a clear sign of R-parity violating SUSY, although its phenomenology may resemble that of a charged Higgs boson, H. We discuss various ways of distinguishing a LSP τ̃1 from H ± at future colliders, and address the case of τ̃1 mimicking the signal for H . As an example we suggest that the recent L3 signal for HH → qqqq and HH → qqτντ could be more easily explained by a LSP τ̃1. Typeset using REVTEX E–mail: [email protected] E–mail: [email protected] E–mail: [email protected]