Brane localized curvature for warped gravitons

We study the effects of including brane localized curvature terms in theRandall-Sundrum (RS) model of the hierarchy. This leads to the existence ofbrane localized kinetic terms for the graviton. Such terms can be induced bybrane and bulk quantum effects as well as Higgs-curvature mixing on the brane.We derive the modified spectrum of Kaluza-Klein (KK) gravitons and theircouplings to 4-dimensional fields in the presence of these terms. We find thatthe masses and couplings of the KK gravitons have considerable dependence onthe size of the brane localized terms; the weak-scale phenomenology of themodel is consequently modified . In particular, the weak-scale spin-2 gravitonresonances which generically appear in the RS model may be significantlylighter than previously assumed. However, they may avoid detection as theirwidths may be too narrow to be observable at colliders. In the contactinteraction limit, for a certain range of parameters, the experimental reachfor the scale of the theory is independent of the size of the boundary terms.Comment: 20 pages, 11 figures, LaTex, minor revision