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- W3090093289 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." @default.
- W3090093289 created "2020-10-08" @default.
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- W3090093289 date "2004-01-01" @default.
- W3090093289 modified "2023-09-26" @default.
- W3090093289 title "On CPT Symmetry: Cosmological, Quantum-Gravitational, and Other Possible Violations and Their Phenomenology" @default.
- W3090093289 hasPublicationYear "2004" @default.
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