Cosmological Background torsion limits from Lorentz violation

Abstract

Cosmological limits on Lorentz invariance breaking in Chern-Simons $(3+1)-dimensional$ electrodynamics are used to place limits on torsion. Birefrigence phenomena is discussed by using extending the propagation equation to Riemann-Cartan spacetimes instead of treating it in purely Riemannian spaces. The parameter of Lorentz violation is shown to be proportional to the axial torsion vector which allows us to place a limit on cosmological background torsion from the Lorentz violation constraint which is given by $10^{-33}eV<|S^{\mu }|<10^{-32}eV$ where $|S^{\mu }|$ is the axial torsion vector.

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