Fifty years of the calculation of the density of particles created in the early Friedmann Universe-Reference-Cited by-同舟云学术

Fifty years of the calculation of the density of particles created in the early Friedmann Universe

Published:2020-01-30 Issue:02n03 Volume:35 Page:2040034
ISSN:0217-751X
Container-title:International Journal of Modern Physics A
language:en
Short-container-title:Int. J. Mod. Phys. A

Author:

Grib A. A.¹²,Pavlov Yu. V.³⁴

Affiliation:

1. A. Friedmann Laboratory for Theoretical Physics, Saint Petersburg, Russia

2. Theoretical Physics and Astronomy Department of the Herzen University, Moika 48, Saint Petersburg 191186, Russia

3. Institute of Problems in Mechanical Engineering, Russian Academy of Sciences, Bol’shoy pr. 61, St. Petersburg 199178, Russia

4. N.I.Lobachevsky Institute of Mathematics and Mechanics, Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Russia

Abstract

The problem of particle creation in cosmology concerning whether the results for the number of particles are infinite or finite is discussed for scalar and spinor particles in Friedmann expanding Universe. It is shown that the results are always finite if one puts in case of scalar particles creation a special term into the Lagrangian. Numerical estimates of the effect of particle creation are made. The role of creation of superheavy particles in cosmology is discussed.

Funder

Russian Foundation for Basic research

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217751X20400345

Reference21 articles.

1. Particle creation from vacuum in homogeneous isotropic models of the Universe

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1. Gravitational Radiation as the Bremsstrahlung of Superheavy Particles in the Early Universe;Universe;2020-10-20

2. Rest frame vacua of massive Klein–Gordon fields on spatially flat FLRW spacetimes;The European Physical Journal C;2020-07