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2016

Self-accelerating Universe in modified gravity with dynamical torsion

Nikiforova, V., Randjbar-Daemi, S., Rubakov, V.

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We consider a model belonging to the class of gravities with dynamical torsion.

The model is free of ghosts and gradient instabilities about Minkowski and torsionless Einstein backgrounds.
We find that at zero cosmological constant, the model admits a self-accelerating solution with non-Riemannian connection.
Small value of the effective cosmological constant is obtained at the expense of the hierarchy between the dimensionless couplings.

Self-accelerating Universe in modified gravity with dynamical torsion · Around

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