2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148934We investigate the possibility that the excess of four-jet events in $e^+e^-$ collisions at LEP-1.5 which has been reported by the ALEPH Collaboration could be due to the production of charginos or neutralinos, followed by their decay into quark jets through baryon number-violating ($λ^{\prime\prime}$) couplings. An estimate at the parton level shows, however, that these events cannot be due to neutralinos because of the low cross-section, and is unlikely to be due to the production of chargino pairs because of the largely different event shapes.31 pages, Latex, uses epsf, extensively revised and updatedHigh Energy Physics - Phenomenologytext