Matter matters in asymptotically safe quantum gravity
We investigate the compatibility of minimally coupled scalar, fermion and gauge fields with asymptotically safe quantum gravity, using nonperturbative functional renormalization group methods. We study d=4,5 and 6 dimensions and within certain approximations find that for a given number of gauge fie...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
8 April 2014
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2014, Volume: 89, Issue: 8, Pages: 084035 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.89.084035 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.89.084035 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.89.084035 
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| Author Notes: | Pietro Donà, Astrid Eichhorn, and Roberto Percacci |
| Summary: | We investigate the compatibility of minimally coupled scalar, fermion and gauge fields with asymptotically safe quantum gravity, using nonperturbative functional renormalization group methods. We study d=4,5 and 6 dimensions and within certain approximations find that for a given number of gauge fields there is a maximal number of scalar and fermion degrees of freedom compatible with an interacting fixed point at positive Newton coupling. The bounds impose severe constraints on grand unification with fundamental Higgs scalars. Supersymmetry and universal extra dimensions are also generally disfavored. The standard model and its extensions accommodating right-handed neutrinos, the axion and dark-matter models with a single scalar are compatible with a fixed point. |
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| Item Description: | Gesehen am 21.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.89.084035 |