  We consider the Randall-Sundrum brane-world model with bulk-brane energy
transfer where the Einstein-Hilbert action is modified by curvature correction
terms: a four-dimensional scalar curvature from induced gravity on the brane,
and a five-dimensional Gauss-Bonnet curvature term. It is remarkable that these
curvature terms will not change the dynamics of the brane universe at low
energy. Parameterizing the energy transfer and taking the dark radiation term
into account, we find that the phantom divide of the equation of state of
effective dark energy could be crossed, without the need of any new dark energy
components. Fitting the two most reliable and robust SNIa datasets, the 182
Gold dataset and the Supernova Legacy Survey (SNLS), our model indeed has a
small tendency of phantom divide crossing for the Gold dataset, but not for the
SNLS dataset. Furthermore, combining the recent detection of the SDSS baryon
acoustic oscillations peak (BAO) with lower matter density parameter prior, we
find that the SNLS dataset also mildly favors phantom divide crossing.
