Hot hadronic matter in the early universe

Details Hot hadronic matter in the early universe Hot hadronic matter in the early universe

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....64..235b&link_type=abstract

Astronomy and Astrophysics, vol. 64, no. 1-2, Mar. 1978, p. 235-242.

Astronomy and Astrophysics

Astrophysics

Astronomical Models, Cosmology, Hadrons, Universe, Baryons, Black Body Radiation, Entropy, Equations Of State, Particle Density (Concentration)

Scientific paper

The hadronic era of the early universe is investigated using a recently developed model of hot matter at densities where strong interactions between the constituents must be taken into account. The models studied are developed from the standard Friedmann cosmology consistent with the present observational situation and include a baryon-number-zero universe as well as three models in which all the observed matter is normal and there is a finite but obviously small baryon number density. The equations of state employed to describe matter during the hadron era are considered, a fully relativistic equation of state is given for neutral baryonic matter, and the evolution of the early universe is analyzed for four values of the current mass density. It is found that an attractive scalar exchange interaction is a common feature of all cases and that the effect of the strong interaction on the lifetime of the universe is negligible in all cases.

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