Journal
PHYSICS LETTERS B
Volume 770, Issue -, Pages 154-160Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2017.04.047
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Funding
- DFG under the Emmy-Noether program [EI-1037-1]
- Emmy-Noether visiting fellowship at the Perimeter Institute for Theoretical Physics
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Economic Development Innovation
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We explore whether quantum gravity effects within the asymptotic safety paradigm can provide a predictive ultraviolet completion for Abelian gauge theories. We evaluate the effect of quantum gravity fluctuations on the running couplings in the gauge sector and discover an asymptotically safe fixed point of the Renormalization Group. In particular, if the strength of gravitational interactions remains below a critical strength, the minimal gauge coupling becomes asymptotically free. Further, we point out that a completely asymptotically free dynamics for the gauge field is impossible to achieve, as asymptotically safe quantum gravity necessarily induces non-vanishing higher-order interactions for the gauge field in the ultraviolet. (C) 2017 The Author(s). Published by Elsevier B.V.
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