We work mainly on a baryogenesis model, based on the Afleck-Dine baryogenesis scenarion, with a complex scalar field, which is a scalar superpartner of a colorless and electrically neutral combination of quark and lepton fields.

The model in brief: After inflation the field starts to oscillate with a decreasing amplitude, due to the Universe expansion and the particle production. The amplitude of the field is damped exponentially and the baryon charge, contained in the field condensate is exponentially reduced. For a considerable range of values of m, H, l and α, the baryon charge may survive until the field decays to quarks and leptons with non-zero average baryon charge. This charge, diluted further by some entropy generating processes, dictates the observed baryon asymmetry.

We are providing numerical analysis of the model, which in its original form was developed analytically and semi-analitically. We are trying to provide more precise account for the particle creation processes, which were proved to play an essential role for baryogenesis. The figure illustrates our preliminary results on the evolution of the baryon charge B contained in the condensate.. The damping due to the particle creation processes is accounted for adiabaticaly.

Publications on the subject :

D.Kirilova, T.Valchanov, On Scalar Condensate Baryogenesis,

ICTP report IC/IR/2004/12, p. 1-9, 2004.

D.Kirilova, T.Valchanov, Early Universe Baryogenesis, presented at

4th Serbian-Bulgarian Astronomical Conference (IV SBGAC), 21-24 April

2004, Belgrade, Serbia

Kirilova D., Baryon Density in modified models of primordial

Nucleosynthesis, AATr v.22, pp. 425 -428, 2003.

Kirilova D., Chizhov M., Non-GUT Baryogenesis and Large Scale

Structure of the Universe, MNRAS 314, p.256-262, 2000.

Kirilova D., Baryogenesis Model Suggesting Antigalaxies,

Astronomical & Astrophysical Transections, 1998, v.15, p. 211.

Chizhov M., Kirilova D., Generation of 128 Mpc

Periodicity of the Universe in the Scalar Field Condensate

Baryogenesis Scenario Astronomical & Astrophysical Transections, 1996,v.10, p.69-75.

Dolgov A., Kirilova D., Baryon Charge Condensate and Baryogenesis,

J. Moscow Phys. Soc. 1, p.217-227, 1991.

Dolgov A.,Kirilova D., On the Temperature of the Boson Condensate

Evaporation and the Baryon Asymmetry of the Universe in the Affleck -

Dine Scenario, Jadr. Phys. 50, p.1621, 1989; Sov. J. Nucl. Phys.50 (6)

1006-1010, 1989.

Kirilova D.,Mateev M., Baryon-Antibaryon Asymmetry of the Universe

and the Fundamental Length, in Theoretical physics and high energy physics,

Sofia: Bulg. Acad. Sci., p.55-62, 1988.