Chiral fermions in asymptotically safe quantum gravity
We study the consistency of dynamical fermionic matter with the asymptotic safety scenario of quantum gravity using the functional renormalisation group. Since this scenario suggests strongly coupled quantum gravity in the UV, one expects gravity-induced fermion self-interactions at energies of the...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
20 May 2016
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| In: |
The European physical journal. C, Particles and fields
Year: 2016, Volume: 76 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-016-4132-7 |
| Online Access: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1140/epjc/s10052-016-4132-7 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1140/epjc/s10052-016-4132-7 
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| Author Notes: | J. Meibohm, J.M. Pawlowski |
MARC
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| 520 | |a We study the consistency of dynamical fermionic matter with the asymptotic safety scenario of quantum gravity using the functional renormalisation group. Since this scenario suggests strongly coupled quantum gravity in the UV, one expects gravity-induced fermion self-interactions at energies of the Planck scale. These could lead to chiral symmetry breaking at very high energies and thus to large fermion masses in the IR. The present analysis which is based on the previous works (Christiansen et al., Phys Rev D 92:121501, 2015; Meibohm et al., Phys Rev D 93:084035, 2016), concludes that gravity-induced chiral symmetry breaking at the Planck scale is avoided for a general class of NJL-type models. We find strong evidence that this feature is independent of the number of fermion fields. This finding suggests that the phase diagram for these models is topologically stable under the influence of gravitational interactions. | ||
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