A power-law coupled three-form dark energy model

Abstract

We consider a field theory model of coupled dark energy which treats dark energy as a three-form field and dark matter as a spinor field. By assuming the effective mass of dark matter as a power-law function of the three-form field and neglecting the potential term of dark energy, we obtain three solutions of the autonomous system of evolution equations, including a de Sitter attractor, a tracking solution and an approximate solution. To understand the strength of the coupling, we confront the model with the latest Type Ia Supernova (SN Ia), Baryon Acoustic Oscillations (BAO) and Cosmic Microwave Backround (CMB) radiation observations, with the conclusion that the combination of these three databases marginalized over the present dark matter density parameter ${\Omega }_{m0}$ and the present three-form field $\kappa X_0$ gives stringent constraints on the coupling constant, $-0.017<\lambda <0.047$ ($2\sigma$ confidence level), by which we give out the model applicable parameter range.

16 pages, 5 figures, refernces added, Eur. Phys. J. C (2018)

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• Hamiltonian formalism and constraint analysis of three-form matter models coupled with general relativity