Conformal anomalies and the production of zero-mass particles in the Friedmann universe

Details Conformal anomalies and the production of zero-mass particles in the Friedmann universe Conformal anomalies and the production of zero-mass particles in the Friedmann universe

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984fiz....27...54b&link_type=abstract

Fizika (ISSN 0021-3411), vol. 27, Aug. 1984, p. 54-58. In Russian.

Astronomy and Astrophysics

Astrophysics

Astrophysics, Big Bang Cosmology, Particle Production, Universe, Anomalies, Flux Density, Perturbation Theory, Tensor Analysis

Scientific paper

The general structure of conformal anomalies of the energy-momentum tensor is established. The energy density of zero-mass particles produced in the cosmological-expansion process is calculated in the framework of low-order perturbation theory. Estimates are presented which show that, in the early universe, the energy density of zero-mass particles can significantly exceed the energy density of particles with mass.

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