The refractive index of the vacuum and the dark sector

Abstract

We discuss a recent result about the refractive index of the vacuum and compare it with existing limits. We consider a possible connection with the dark sector.

4 pages

References in corpus (3)

• Data Tables for Lorentz and CPT Violation
• Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
• Obtaining bounds from ultra-high energy cosmic rays in isotropic modified Maxwell theory