Dark aspects of massive spinor electrodynamics

作者：Kim Edward J^*; Kouwn Seyen; Oh Phillial; Park Chan Gyung

来源：Journal of Cosmology and Astroparticle Physics, 2014, 2014(7): 001.

DOI：10.1088/1475-7516/2014/07/001

• dark energy theory
• gravity

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 pressureless dark matter, and for generic values of the coupling constant, the theory effectively provides an interacting model between them with an additional energy density of the form similar to 1/a(6). The evolution equations mimic Lambda CDM behavior up to 1/a(3) term and the additional term represents a deviation from Lambda CDM. We show that the deviation is compatible with the observational data, if it is very small. We find that the non-minimal interaction is responsible for generating an effective cosmological constant which is directly proportional to the mass squared of the vector field and the mass of the photon within its current observational limit could be the source of the dark energy.

• 出版日期2014-7