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We consider the dark matter scalar in the Randall Sundrum background andstudy the annihilation cross section if the curvature-scalar mixing is switchedon. In this case, in addition to the radion, the standard model Higgs scalardrives the annihilation and it leads to a considerable enhancement in theannihilation cross section. Furthermore we take unparticle, having a non-zeromass coming from the standard model Higgs-unparticle interaction in the lowenergy level, as a dark matter candidate and analyze the annihilation crosssection by including the effect of the curvature-scalar mixing. We see that,for both choices, the mixing process plays an essential role in obtaining thedark matter annihilation cross section in the current range.

The effect of the curvature-scalar mixing on the annihilation cross sections of dark matter scalar and unparticle dark matter