R-parity violation effect on the top-quark pair production at linear colliders

We investigate in detail the effects of R-parity lepton number violation in the minimal supersymmetric standard model (MSSM) on top-quark pair production via both e--e+ and γ-γ collision modes at the linear colliders. We find that with the present experimental constrained Re parameters, the effect of Re interactions on the processes e+e-→tt-bar and e+e-→γγ→tt-bar could be significant and may reach -30% and several percent, respectively. Our results show that the Re effects are sensitive to the c.m. system energy and the relevant Re parameters. However, they are not sensitive to squark and slepton masses when mq-tilde≥400 GeV (or ml-tilde≥300 GeV) and are almost independent of tan β