Dark spinor model with torsion and cosmology

Abstract

We study cosmological consequences of the dark spinor model when torsion is included. Only some components of the torsion are allowed to be non-vanishing in homogeneous and isotropic cosmology, but there exist freedoms in the choice of these components which is consistent with the evolution equations. We exploit this and discuss several cases which can result in interesting cosmological consequences. Especially, we show that there exist exact cosmological solutions in which the Universe began its acceleration only recently and this solution is an attractor. This corresponds to a specific form of the torsion with a mild fine-tuning which can address the coincidence problem.

9 pages, 2 figures, typos corrected

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Cited by in corpus (12)

• Classification of Singular Spinor Fields and Other Mass Dimension One Fermions
• Hawking Radiation from Elko Particles Tunnelling across Black Strings Horizon
• VSR symmetries in the DKP algebra: the interplay between Dirac and Elko spinor fields
• Bilinear Covariants and Spinor Fields Duality in Quantum Clifford Algebras
• $\Lambda (t)$ cosmology induced by a slowly varying Elko field
• From inflation to recent cosmic acceleration: The fermionic Elko field driving the evolution of the universe
• Evolution of the universe driven by a mass dimension one fermion field
• Elko and mass dimension one field of spin one half: causality and Fermi statistics
• Onset of acceleration in a Universe initially filled by dark and baryonic matters in nonminimally coupled teleparallel model
• Partition function for a mass dimension one fermionic field and the dark matter halo of galaxies
• An unified cosmological evolution driven by a mass dimension one fermionic field
• Generalized Elko Theory