Remark on Immirzi Parameter, Torsion, and Discrete Symmetries

Abstract

We point out that the new interaction of spinning particles with the torsion tensor, discussed recently, is odd under charge conjugation and time reversal. This explains rather unexpected symmetry properties of the induced effective 4-fermion interaction.

3 pages

References in corpus (2)

• Quantum Gravity, Torsion, Parity Violation and all that
• Physical effects of the Immirzi parameter

Cited by in corpus (6)

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• Non-minimally coupled Dirac equation with torsion: Poincaré gauge theory of gravity with even and odd parity terms