Quantum gravity and Standard-Model-like fermions

A. Eichhorn, S. Lippoldt

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Abstrakt

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.

OriginalsprogEngelsk
TidsskriftPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Vol/bind767
Sider (fra-til)142-146
ISSN0370-2693
DOI
StatusUdgivet - 2017
Udgivet eksterntJa

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