Quantum effects in the early universe. V. Finite particle production without trace anomalies

Journal Article · Fri May 15 00:00:00 EDT 1981 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.23.2121· OSTI ID:6498106

Hartle, J B

The production of scalar particles in a homogeneous isotropic spatially flat universe containing classical baryons and radiation is studied for regulated massless free-field theories without trace anomalies. The pair-production probability is evaluated to lowest nonvanishing order in the parameter j = lp/sub b//p/sub r//sup ts3/4/, where l is the Planck length, p/sub b/ is the baryon energy density, and p/sub r/ is the radiation energy density, all in units where h = c = 1. For our universe japprox.10/sup -27/. The back reaction regulates the production of scalar particles near the singularity so that the probability to produce a pair in the volume occupied by one baryon over the history of the universe is finite, of order of magnitude jm/sub b/l, where m/sub b/ is the mass of a typical baryon, and therefore very small.

• Research Organization: Department of Physics, University of California, Santa Barbara, California 93106
• OSTI ID: 6498106
• Journal Information: Phys. Rev. D; (United States), Vol. 23:10
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
UNIVERSE
PARTICLE PRODUCTION
BARYONS
CLASSICAL MECHANICS
COSMOLOGICAL MODELS
MASSLESS PARTICLES
PROBABILITY
QUANTUM FIELD THEORY
SCALAR FIELDS
SPACE-TIME
ULTRAVIOLET DIVERGENCES
WAVE EQUATIONS
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FIELD THEORIES
HADRONS
MATHEMATICAL MODELS
MECHANICS
PARTIAL DIFFERENTIAL EQUATIONS
645201* - High Energy Physics- Particle Interactions & Properties-Theoretical- General & Scattering Theory
640106 - Astrophysics & Cosmology- Cosmology
645400 - High Energy Physics- Field Theory