CPT violations in Astrophysics and Cosmology

TL;DR

This paper reviews current astrophysical and cosmological constraints on CPT and Lorentz invariance violations, highlighting their complementarity to laboratory experiments in probing fundamental physics at high energies and large scales.

Contribution

It provides a concise overview of observational limits on CPT and Lorentz violations from astrophysical data, connecting them to theories like quantum gravity and string/M-theory.

Findings

Current astrophysical data set stringent limits on CPT violations.

Observational tests complement accelerator experiments in probing fundamental physics.

Astrophysical observations can access higher energies and larger distances than laboratory tests.

Abstract

In this paper it is given a brief review of the current limits on the magnitude of CPT and Lorentz Invariance violations, currently predicted in connection with quantum gravity and string/M-theory, that can be derived from astrophysical and cosmological data. Even if not completely unambiguous, these observational tests of fundamental physics are complementary to the ones obtained by accelerator experiments and by ground or space based direct experiments, because potentially can access very high energies and large distances.