Possible Origin of Antimatter Regions in the Baryon Dominated Universe

  title={Possible Origin of Antimatter Regions in the Baryon Dominated Universe},
  author={Maxim Yu. Khlopov and Sergei G. Rubin and Alexander S. Sakharov},
  journal={Physical Review D},
We discuss the evolution of U(1) symmetric scalar field at the inflation epoch with a pseudo Nambu-Goldstone tilt revealing after the end of exponential expansion of the Universe. The U(1) symmetry is supposed to be associated with baryon charge. It is shown that quantum fluctuations lead in natural way to baryon dominated Universe with antibaryon excess regions. The range of parameters is calculated at which the fraction of Universe occupied by antimatter and the size of antimatter regions… 

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