期刊
PHYSICS LETTERS B
卷 767, 期 -, 页码 142-146出版社
ELSEVIER
DOI: 10.1016/j.physletb.2017.01.064
关键词
-
资金
- DFG [GRK1523/2, Gi328/7-1]
- Imperial College Junior Research Fellowship
- DFG through the Emmy-Noether program [Ei-1037-1]
We discover that chiral symmetry does not act as an infrared attractor of the renormalization group flow under the impact of quantum gravity fluctuations. Thus, observationally viable quantum gravity models must respect chiral symmetry. In our truncation, asymptotically safe gravity does, as a chiral fixed point exists. A second non-chiral fixed point with massive fermions provides a template for models with dark matter. This fixed point disappears for more than 10 fermions, suggesting that an asymptotically safe ultraviolet completion for the standard model plus gravity enforces chiral symmetry. (C) 2017 The Author(s). Published by Elsevier B.V.
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