Probe of the radion-Higgs mixing in the Randall-Sundrum model at e(+)e(-) colliders

[[abstract]]In the Randall-Sundrum model, the radion-Higgs mixing is weakly suppressed by the effective electroweak scale. A novel feature of the existence of gravity-scalar mixing would be a sizable three-point vertex, h(munu)((n))-h-phi. We study this vertex in the process e(+)e(-)-->h(munu)((n))-->hphi, which is allowed only with a nonzero radion-Higgs mixing. It is shown that the angular distribution is a unique characteristic of the exchange of massive spin-2 gravitons, and the total cross section at the future e(+)e(-) colliders is big enough to cover a large portion of the parameter space that the LEP or LEP II data cannot constrain[[fileno]]2010134010049[[department]]物理