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The universal radio--X-ray correlation (F_R \propto F_X^{b}, b~0.5-0.7) hasbeen found for a sample of black-hole X-ray binaries (BHBs) in their low/hardstates, which can roughly be explained by the coupled model of jet andradiatively inefficient advection dominated accretion flow. However, more andmore `outliers' were found in last few years, which evidently deviate from theuniversal radio-X-ray correlation and usually show a much steeper correlationwith an index of ~1.4. Based on simple physical assumptions, the radiativelyefficient accretion flows are speculated to exist in these `outliers'. In thiswork, we test this issue by modelling the `outliers' track based on theradiatively efficient disc-corona model and the hybrid jet model. We find thatour model predicts a steeper radio--X-ray correlation with slopes >~1.2 for thetypical viscosity parameter of \alpha~0.05-0.2. In particular, the slope is~1.4 for the case of \alpha~0.1, which is consistent with the observationalresults of H1743-322 very well. Our results suggest that the `outliers' trackmay be regulated by the disc-corona model.

Modelling the `outliers' track of the radio--X-ray correlation in X-ray binaries based on disc-corona model