Junhyung Kim, Seyen Kouwn, Phillial Oh, Chan-Gyung Park
We investigate the cosmology of massive spinor electrodynamics when torsion is non-vanishing. A non-minimal interaction is introduced between the torsion and the vector field and the coupling constant between them plays an important role in subsequential cosmology. It is shown that the mass of the vector field and torsion conspire to generate dark energy and dark matter, and for generic values of the coupling constant, the theory effectively provides an interacting model of dark energy and dark matter with additional stiff matter. We show that the presence of a very small fraction of stiff matter in \Lambda CDM model is consistent with the observational data. We find that the non-minimal interaction is responsible for generating the dark energy density which is directly proportional to the mass squared of the vector field, and it is within the the experimental limit of the massive photon.
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http://arxiv.org/abs/1305.4438
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