A cosmological bound on $e^{+}{e}^{-}$ mass difference

Abstract

We demonstrate that CPT-violation due to $e^{+}{e}^{-}$ mass difference generates a non-zero photon mass. As a result the cosmological bounds on the photon mass lead to the bounds on $e^{+}{e}^{-}$ mass difference which are at least by 10 orders of magnitude stronger than the direct experimental bound.

8 pages

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