ALEPH-4-JET EXCESS, R-B AND R-PARITY VIOLATION

We point out that the exotic 4-jet events reported by ALEPH may consti tute a signal for supersymmetry with some relatively light superpartne rs and with explicitly broken R-parity. A parton level simulation show s that production of a pair of light charginos with their subsequent b aryon-number violating decays (either through a stop or through a neut ralino) could possibly give rise to this excess. The decay chi(1)(-) - -> (t) over tilde(1)b --> dsb leads to signatures close to the experim ental observations. The additional contributions to R-b in such a scen ario are also discussed.