Direct baryogenesis in the broken phase

Takehiko Asaka, Hiroyuki Ishida, Wen Yin

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We show a new mechanism for baryogenesis where the reheating temperature can be smaller than the electroweak scale. The baryon number symmetry is violated by a dimension nine operator which conserves a baryon parity. A high energy quark from the decay of a heavy particle, e.g. inflaton, modulus or gravitino, undergoes flavor oscillation, and is thermalized due to the scatterings with the ambient thermal plasma. We point out that the baryon asymmetry of our universe can be generated due to the scatterings via the baryon number violating operator. Our scenario can be tested in neutron-antineutron oscillation experiments as well as other terrestrial experiments.

Original languageEnglish
Article number174
JournalJournal of High Energy Physics
Issue number7
Publication statusPublished - 2020 Jul 1


  • Beyond Standard Model
  • CP violation
  • Cosmology of Theories beyond the SM


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