Abstract
We have refined our previously suggested scenario of generation of the cosmological baryon asymmetry through an asymmetric capture of baryons and antibaryons by a primordial black hole [A. D. Dolgov and N. A. Pozdnyakov, arXiv:2009.04361]. It is found that in the limit of weak interactions of hypothetical heavy baryons with the primeval plasma the effect can be strongly enhanced and the observed magnitude of the asymmetry can be obtained for a wide range of the model parameters.
Highlights
The generally accepted mechanism of generation of the cosmological baryon asymmetry was suggested by Sakharov [1] in 1967
The magnitude of the asymmetry expressed in terms of the present-day number densities of baryons, antibaryons, and photons of the cosmic microwave background radiation is equal to
The calculations of the baryon asymmetry of the universe in the frameworks of the Zeldovich scenario [14] have been performed in Refs. [17,18]. These pioneering works were followed with a plethora of scenarios according to which cosmological baryon asymmetry could be generated in the process of black hole evaporation [19,20,21,22,23,24,25,26,27,28,29]
Summary
The generally accepted mechanism of generation of the cosmological baryon asymmetry was suggested by Sakharov [1] in 1967. [17,18] These pioneering works were followed with a plethora of scenarios according to which cosmological baryon asymmetry could be generated in the process of black hole evaporation [19,20,21,22,23,24,25,26,27,28,29]. III cosmological baryon asymmetry due to antibaryon capture by a PBH is calculated and the values of the parameters are fixed to ensure the proper magnitude of the asymmetry Throughout this paper these particles are called X and Xfor baryons and antibaryons respectively.
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