Asymptotic safety of gravity-matter systems
We study the ultraviolet stability of gravity-matter systems for general numbers of minimally coupled scalars and fermions. This is done within the functional renormalization group setup put forward in [N. Christiansen, B. Knorr, J. Meibohm, J. M. Pawlowski, and M. Reichert, Phys. Rev. D 92, 121501...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
19 April 2016
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| In: |
Physical review
Year: 2016, Volume: 93, Issue: 8 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.93.084035 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.93.084035 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.93.084035 
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| Author Notes: | J. Meibohm, J. M. Pawlowski, and M. Reichert |
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| 520 | |a We study the ultraviolet stability of gravity-matter systems for general numbers of minimally coupled scalars and fermions. This is done within the functional renormalization group setup put forward in [N. Christiansen, B. Knorr, J. Meibohm, J. M. Pawlowski, and M. Reichert, Phys. Rev. D 92, 121501 (2015).] for pure gravity. It includes full dynamical propagators and a genuine dynamical Newton’s coupling, which is extracted from the graviton three-point function. We find ultraviolet stability of general gravity-fermion systems. Gravity-scalar systems are also found to be ultraviolet stable within validity bounds for the chosen generic class of regulators, based on the size of the anomalous dimension. Remarkably, the ultraviolet fixed points for the dynamical couplings are found to be significantly different from those of their associated background counterparts, once matter fields are included. In summary, the asymptotic safety scenario does not put constraints on the matter content of the theory within the validity bounds for the chosen generic class of regulators. | ||
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