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We consider a scenario with an additional scalar standard model singlet$\phi_S$, living in a single extra dimension of the RS1 background. The zeromode of this scalar which is localized in the extra dimension is a dark mattercandidate and the annihilation cross section is strongly sensitive to itslocalization parameter. As a second scenario, we assume that the standard modelHiggs field is accessible to the fifth flat extra dimension. At first we takethe additional standard model singlet scalar field as accessible to the sixthextra dimension and its zero mode is a possible dark matter candidate. Second,we consider that the new standard model singlet, the dark matter candidate,lives in four dimensions. In both choices the KK modes of the standard modelHiggs field play an observable role for the large values of thecompactification radius $R$ and the effective coupling \lambda_{S} is of theorder of 10^{-2}-10^{-1} (10^{-6}) far from (near to) the resonantannihilation.

Annihilation cross sections and interaction couplings of the dark matter candidates in the warped and flat extra dimensions