Massive mimetic cosmology
| Autor: | Adam R. Solomon, Yashar Akrami, Valeri Vardanyan |
|---|---|
| Přispěvatelé: | Laboratoire de physique de l'ENS - ENS Paris (LPENS (UMR_8023)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Astrophysique, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Université Paris Diderot - Paris 7 (UPD7)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Université Paris Diderot - Paris 7 (UPD7) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
High Energy Physics - Theory
Nuclear and High Energy Physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) perturbation gravitation: model stability: linear Dark matter gravitation: effect FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Cosmological constant Astrophysics::Cosmology and Extragalactic Astrophysics Curvature graviton: mass cosmological constant: negative 01 natural sciences General Relativity and Quantum Cosmology Cosmology dark matter: parametrization Metric expansion of space Theoretical physics High Energy Physics::Theory cosmological model: parameter space 0103 physical sciences structure gravitation: massive 010306 general physics Physics 010308 nuclear & particles physics [PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th] Graviton acceleration ghost lcsh:QC1-999 graviton: effect Massive gravity High Energy Physics - Theory (hep-th) dark energy: density curvature Dark energy [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] history mass: gravitation lcsh:Physics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Phys.Lett.B Phys.Lett.B, 2019, 794, pp.135-142. ⟨10.1016/j.physletb.2019.05.045⟩ Physics Letters Physics Letters B, Vol 794, Iss, Pp 135-142 (2019) Physics Letters B, 794, 135-142 Physics Letters B Physics Letters B, Elsevier, 2019, 794, pp.135-142. ⟨10.1016/j.physletb.2019.05.045⟩ |
| ISSN: | 0370-2693 |
| DOI: | 10.1016/j.physletb.2019.05.045⟩ |
| Popis: | We study the first cosmological implications of the mimetic theory of massive gravity recently proposed by Chamseddine and Mukhanov. This is a novel theory of ghost-free massive gravity which additionally contains a mimetic dark matter component. In an echo of other modified gravity theories, there are self-accelerating solutions which contain a ghost instability. In the ghost-free region of parameter space, the effect of the graviton mass on the cosmic expansion history amounts to an effective negative cosmological constant, a radiation component, and a negative curvature term. This allows us to place constraints on the model parameters---the graviton mass and the St\"uckelberg vacuum expectation value---by insisting that the effective radiation and curvature terms be within observational bounds. The late-time acceleration must be accounted for by a separate positive cosmological constant or other dark energy sector. We impose further constraints at the level of perturbations by demanding linear stability. We comment on the possibility of distinguishing this theory from $\Lambda$CDM with current and future large-scale structure surveys. Comment: 9+1 pages, 1 figure. Version published in PLB |
| Databáze: | OpenAIRE |
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