Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987afz....26..377g&link_type=abstract
(Astrofizika, vol. 26, Mar.-Apr. 1987, p. 377-385) Astrophysics (ISSN 0571-7132), vol. 26, no. 2, Sept. 1987, p. 229-234. Transl
Astronomy and Astrophysics
Astrophysics
Bosons, Fermions, Particle Production, Temperature Effects, Universe, Astronomical Models, High Temperature Environments, Scalars, Spinor Groups
Scientific paper
The creation of particles (bosons and fermions) in a hot Friedmann universe from an initial state described by a thermal density matrix is considered in the case when the effective mass of the particles depends on the temperature. It is shown that for scalar particles allowance for the temperature effects leads to a very strong suppression of the creation process. For spinor particles, allowance for the temperature effects leads to a strong suppression of the process of creation from an initial vacuum state. However, if the creation of the spinor particles takes place from a state described by a thermal density matrix, then the temperature effect on the particle creation process is relatively weak.
Guenther Uwe
Zhuk Alexander I.
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