Parameterizing the SFC Baryogenesis Model

Daniela Kirilova,Mariana Panayotova

doi:10.1155/2015/425342

Abstract

We have numerically explored the scalar field condensate baryogenesis model for numerous sets of model’s parameters, within their natural range of values. We have investigated the evolution of the baryon charge carrying field, the evolution of the baryon charge contained in the scalar field condensate, and the final value of the generated baryon charge on the model’s parameters: the gauge coupling constantα, the Hubble constant at the inflationary stageHI, the massm, and the self-coupling constantsλi.

Highlights

There exists baryon asymmetry β ≠ 0 in the neighborhood of our Galaxy, within 20 Mpc. β is usually parameterized as β =/nγ, where nb is the number density of baryons, nb is the number density of antibaryons, and nγ is the number density of photons
Contemporary observational knowledge on the baryon density of the Universe is based mainly on the following sets of precise observational data: data based on Big Bang Nucleosynthesis (BBN), that is, the determination of the baryon density from the requirement of consistency between theoretically predicted abundance and observationally measured abundance of the primordially produced light elements [1]; measurements of Deuterium towards low metallicity distant quasars compared with BBN predicted D [2]; and CMB anisotropy measurements, allowing precise determination of the main Universe characteristics, including the baryon density
We have accounted numerically for the particle creation processes by varying φ, which allowed us to describe more precisely the evolution of B and determine its final value which was transferred to quarks at tb epoch and defined the baryon asymmetry

Summary

Introduction

A short list of these is as follows: (i) it is extremely efficient: it can produce equal or much bigger baryon asymmetry than the observed one; (ii) it can be realized at lower energy, that is, relatively late in the Universe evolution That is, it is consistent with the low energy scales after inflation; (iii) AD condensate can be generated generically in different cosmological models; (iv) it can explain simultaneously the generation of the baryon and the dark matter in the Universe and explain their surprisingly close values; (v) AD model, due to its high efficiency, can be successful even in case of significant production of entropy at late times, predicted by some particle physics models. The last section presents the results; that is, we present the value of the produced baryon density for numerous sets of model’s parameters

SFC Baryogenesis Model

Numerical Results

Estimation of the Generated Baryon Asymmetry

Conclusions