STOPS IN R-PARITY BREAKING MODEL FOR HIGH-Q(2) EVENTS AT HERA

We investigate an event excess in the reaction e(+)p --> e(+)X with la rge x and high Q(2) observed at HERA and show that the events could na turally be interpreted as a signature of the production of the scalar top quarks (stops) in a supersymmetric model with R-parity breaking in teractions. The HERA events are characterized by the broad mass distri bution and in fact it can be simulated by our specific scenario if we consider almost degenerate two mass eigenstates <(t(1))over tilde> and <(t(2))over tilde> of the stops. (C) 1997 Elsevier Science B.V.