Asymptotic safety and Kaluza-Klein gravitons at the LHC

Details Asymptotic safety and Kaluza-Klein gravitons at the LHC Asymptotic safety and Kaluza-Klein gravitons at the LHC

2011-01-28

arxiv.org/abs/1101.5548v1

Phys.Rev.D83:084048,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 14 figures

Scientific paper

10.1103/PhysRevD.83.084048

We study Drell-Yan production at the LHC in low-scale quantum gravity models with extra dimensions. Asymptotic safety implies that the ultra-violet behavior of gravity is dictated by a fixed point. We show how the energy dependence of Newton's coupling regularizes the gravitational amplitude using a renormalization group improvement. We study LHC predictions and find that Kaluza-Klein graviton signals are well above Standard Model backgrounds. This leaves a significant sensitivity to the energy scale Lambda_T where the gravitational couplings cross over from classical to fixed point scaling.

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