R - parity violation in ( t + t̄ ) g̃ production at LHC and Tevatron ∗

We study the production of (t + ¯ t)˜ g at the hadron colliders in an R-parity (R p) violating supersymmetric model. This process provides us with information not only about R p violation, but may also help us in detecting the supersymmetry itself. It is possible to detect an R p violating signal (with single gluino production) at the future hadron colliders, such as Fermilab Tevatron Run II or CERN Large Hadron Collider (LHC), if the parameters in the supersymmetric / R p interactions are not too small, e.g. for m ˜ g = 1 TeV, λ ′′ = 0.1, still hundreds of events are produced at LHC with luminosity 30 f b −1. Even if we could not detect a signal of / R p in the experiment, we get stringent constraints on the heavy flavour / R p couplings. In addition to the minimal supersymmetric standard model we have also considered some models with a heavy gluino as the lightest supersymmetric particle.