  The universal radio--X-ray correlation (F_R \propto F_X^{b}, b~0.5-0.7) has
been found for a sample of black-hole X-ray binaries (BHBs) in their low/hard
states, which can roughly be explained by the coupled model of jet and
radiatively inefficient advection dominated accretion flow. However, more and
more `outliers' were found in last few years, which evidently deviate from the
universal radio-X-ray correlation and usually show a much steeper correlation
with an index of ~1.4. Based on simple physical assumptions, the radiatively
efficient accretion flows are speculated to exist in these `outliers'. In this
work, we test this issue by modelling the `outliers' track based on the
radiatively efficient disc-corona model and the hybrid jet model. We find that
our model predicts a steeper radio--X-ray correlation with slopes >~1.2 for the
typical 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 observational
results of H1743-322 very well. Our results suggest that the `outliers' track
may be regulated by the disc-corona model.
