Asymptotic safety in gravity and sigma models
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منابع مشابه
Asymptotic safety and Kaluza-Klein gravitons at the LHC
We study Drell-Yan production at the LHC in low-scale quantum gravity models with extra dimensions. Asymptotic safety implies that the ultraviolet 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 s...
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Dilatonic gravity near two dimensions and asymptotic freedom of the gravitational coupling constant
Two models of dilatonic gravity are investigated: (i) dilaton-Yang-Mills gravity and (ii) higher-derivative dilatonic gravity. Both are renormalizable in 2 + ǫ dimensions and have a smooth limit for ǫ → 0. The corresponding one-loop effective actions and beta-functions are found. Both theories are shown to possess a non-trivial ultraviolet fixed point —for all dilatonic couplings— in which the ...
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