On CPT symmetry: Cosmological, quantum-gravitational and other possible violations and their phenomenology

Research output: Chapter in Book/Report/Conference proceedingConference paper

Abstract

I discuss various ways in which CPT symmetry may be violated, and their phenomenology in current or immediate future experimental facilities, both terrestrial and astrophysical. Specifically, I discuss first violations of CPT symmetry due to the impossibility of defining a scattering matrix as a consequence of the existence of microscopic or macroscopic space-time boundaries, such as Planck-scale Black-Hole (event) horizons, or cosmological horizons due to the presence of a (positive) cosmological constant in the Universe. Second, I discuss CPT violation due to breaking of Lorentz symmetry, which may characterize certain approaches to quantum gravity, and third, I describe models of CPT non invariance due to violations of locality of interactions. In each of the above categories I discuss experimental sensitivities. I argue that the majority of Lorentz-violating cases of CPT breaking, with minimal (linear) suppression by the Planck-mass scale, are already excluded by current experimental tests. There are however some (stringy) models which can evade these constraints.
Original languageEnglish
Title of host publicationSPRINGER PROC PHYS
Place of PublicationBERLIN
PublisherSpringer
Pages43 - 72
Number of pages30
ISBN (Print)3-540-21843-2
Publication statusPublished - 2003
Event4th International Conference on Particle Physics Beyond the Standart Model - Castle Ringberg, Germany
Duration: 1 Jan 2003 → …

Publication series

NameSPRINGER PROCEEDINGS IN PHYSICS

Conference

Conference4th International Conference on Particle Physics Beyond the Standart Model
Country/TerritoryGermany
CityCastle Ringberg
Period1/01/2003 → …

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