Abstract
We investigate a natural realization of a light Abelian hidden sector in an extended Randall-Sundrum (RS) model. In addition to the usual RS bulk we consider a second warped space containing a bulk U(1) x gauge theory with a characteristic IR scale of order a GeV. This Abelian hidden sector can couple to the standard model via gauge kinetic mixing on a common UV brane. We show that if such a coupling induces significant mixing between the lightest U(1) x gauge mode and the standard model photon and Z, it can also induce significant mixing with the heavier U(1) x Kaluza-Klein (KK) modes. As a result it might be possible to probe several KK modes in upcoming fixed-target experiments and meson factories, thereby offering a new way to investigate the structure of an extra spacetime dimension.
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McDonald, K.L., Morrissey, D.E. Low-energy probes of a warped extra dimension. J. High Energ. Phys. 2010, 56 (2010). https://doi.org/10.1007/JHEP05(2010)056
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DOI: https://doi.org/10.1007/JHEP05(2010)056