Particle Horizon and Warped Phenomenology

Details Particle Horizon and Warped Phenomenology Particle Horizon and Warped Phenomenology

2001-05-29

arxiv.org/abs/hep-ph/0105307v1

Phys.Lett. B513 (2001) 251-257

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 1 figure, REVTEX

Scientific paper

10.1016/S0370-2693(01)00761-4

Giant resonances of gravity Kaluza-Klein modes (with tensor couplings) in high energy collisions are expected in the Randall-Sundrum orbifold model that incorporates a plausible solution to the hierarchy problem. When the model is extended to incorporate an exponentially small 4-D cosmological constant, the KK spectrum becomes continuous, even in the compactified case. This is due to the presence of a particle horizon, which provides a way to evade Weinberg's argument of the need of fine-tuning to get a very small cosmological constant.

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