R-parity violation in $(t+\bar t) ilde g$ production at LHC and Tevatron

摘要

We study the production of $(t+\bar{t}) \tilde{g}$ at the hadron colliders inan R-parity ($R_{p}$) violating supersymmetric model. This process provides uswith information not only about $R_{p}$ violation, but may also help us indetecting the supersymmetry itself. It is possible to detect an $R_{p}$violating signal (with single gluino production) at the future hadroncolliders, such as Fermilab Tevatron Run II or CERN Large Hadron Collider(LHC), if the parameters in the supersymmetric $\rlap/ R_{p}$ interactions arenot too small, e.g. for $m_{\tilde{g}}=1$ TeV, $\lambda^{''}=0.1$, stillhundreds of events are produced at LHC with luminosity $30 fb^{-1}$. Even if wecould not detect a signal of $ \rlap/R_{p}$ in the experiment, we get stringentconstraints on the heavy flavour $\rlap/R_{p}$ couplings. In addition to theminimal supersymmetric standard model we have also considered some models witha heavy gluino as the lightest supersymmetric particle.