Close to the edge: hierarchy in a double braneworld

Details Close to the edge: hierarchy in a double braneworld Close to the edge: hierarchy in a double braneworld

2006-05-16

arxiv.org/abs/hep-th/0605160v2

Phys.Rev. D74 (2006) 084025

Physics

High Energy Physics

High Energy Physics - Theory

Some typos corrected, references added

Scientific paper

10.1103/PhysRevD.74.084025

We show that the hierarchy between the Planck and the weak scales can follow from the tendency of gravitons and fermions to localize at different edges of a thick double wall embedded in an $AdS_5$ spacetime without reflection symmetry. This double wall is a stable BPS thick-wall solution with two sub-walls located at its edges; fermions are coupled to the scalar field through Yukawa interactions, but the the lack of reflection symmetry forces them to be localized in one of the sub-walls. We show that the graviton zero-mode wavefunction is suppressed in the fermion edge by an exponential function of the distance between the sub-walls, and that the massive modes decouple so that Newtonian gravity is recuperated.

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