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Single slepton production in association with a top quark at the CERN LargeHadron Collider (LHC) is one of the important processes in probing the R-parityviolation couplings. We calculate the QCD next-to-leading order (NLO)corrections to the $pp \to t\slep^{-}(\bar{t}\slep^{+})+X$ process at the LHCand discuss the impacts of the QCD corrections on kinematic distributions. Weinvestigate the dependence of the leading order (LO) and the NLO QCD correctedintegrated cross section on the factorization/renormalization energy scale,slepton, stop-quark and gluino masses. We find that the uncertainty of the LOcross section due to the energy scale is obviously improved by the NLO QCDcorrections, and the exclusive jet event selection scheme keeps the convergenceof the perturbative series better than the inclusive scheme. The results showthat the polarization asymmetry of the top-quark will be reduced by the NLO QCDcorrections, and the QCD corrections generally increase with the increment ofthe $\tilde{t}_1$ or $\tilde{g}$ mass value.

Single slepton production associated with a top quark at LHC in NLO QCD