Stops in R-parity Breaking Model for High-Q² Events at HERA

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We investigate an event excess in the reaction e+p → e+ X with large x and high Q² observed at HERA and show that the events could naturally be interpreted as a signature of the production of the scalar top quarks (stops) in a supersymmetric model with R-parity breaking interactions. The HERA events are characterized by the broad mass distribution and in fact it can be simulated by our specific scenario if we consider almost degenerate two mass eigenstates t₁ and t₂ of the stops.