Particle decay and violation of CPT invariance in expanding universes - The pi exp 0-2gamma model

Details Particle decay and violation of CPT invariance in expanding universes - The pi exp 0-2gamma model Particle decay and violation of CPT invariance in expanding universes - The pi exp 0-2gamma model

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987cqgra...4.1437l&link_type=abstract

Classical and Quantum Gravity (ISSN 0264-9381), vol. 4, Sept. 1, 1987, p. 1437-1447.

Physics

4

Big Bang Cosmology, Particle Theory, Quantum Theory, Time Dependence, Conformal Mapping, Field Theory (Physics), Invariance, Pair Production, Particle Interactions

Scientific paper

The decay of one massive, conformally coupled scalar particle into two photons, and the time-reversed decay, are investigated according to the pi exp 0-2gamma model interaction in a spatially flat Robertson-Walker universe. Special attention is drawn to the problem of CPT noninvariance. It is found that both decay processes are not CPT invariant if: (1) the expansion of the universe provides a T-asymmetric background; and (2) the conditions for free-particle creation are fulfilled for at lesat one of the quantum fields participating in the interaction.

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