New perturbative black hole solutions in an explicit spacetime-symmetry-breaking gravity EFT, with derived observables including three-horizon metrics when two coefficients are active.
3+1 Formulation of the Standard-Model Extension Gravity Sector
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abstract
We present a 3+1 formulation of the effective field theory framework called the Standard-Model Extension in the gravitational sector. The explicit local Lorentz and diffeomorphism symmetry breaking assumption is adopted and we perform a Dirac-Hamiltonian analysis. We show that the structure of the dynamics presents significant differences from General Relativity and other modified gravity models. We explore Hamilton's equations for some special choices of the coefficients. Our main application is cosmology and we present the modified Friedmann equations for this case. The results show some intriguing modifications to standard cosmology. In addition, we compare our results to existing frameworks and models and we comment on the potential impact to other areas of gravitational theory and phenomenology.
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gr-qc 1years
2024 1verdicts
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Perturbative black-hole and horizon solutions in gravity with explicit spacetime-symmetry breaking
New perturbative black hole solutions in an explicit spacetime-symmetry-breaking gravity EFT, with derived observables including three-horizon metrics when two coefficients are active.