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Big Bang Nucleosynthesis Constraint on B-mesogenesis

  • James M. Cline
  • Jonas Frerick
  • Sebastian A. Naja
  • Yong Xu
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Abstract

B-mesogenesis is a low-temperature baryogenesis mechanism, that uses CP-violation of the B mesons in the standard model to fulfill the Sakharov conditions. It requires a late period of matter domination by a scalar field Φ that decays into bb̅ quarks, reheating the Universe below the QCD phase transition. We investigate the impact of this mechanism on Big Bang Nucleosynthesis, with respect to the reheating temperature Trh, and the mass of Φ. Injection of hadrons skewing neutron/proton interconversions are the most important effect, followed by neutrino heating from Φ decays. For MΦ≲ 100GeV, Trh must be ≳ 10MeV.

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Cite

BibTeXRIS
BibTeX
@misc{cline2026bang,
  title = {{Big Bang Nucleosynthesis Constraint on $B$-mesogenesis}},
  author = {James M. Cline and Jonas Frerick and Sebastian A. Naja and Yong Xu},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.03455},
  eprint = {2610.03455},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.03455},
}
RIS
TY  - UNPB
TI  - Big Bang Nucleosynthesis Constraint on B-mesogenesis
AU  - James M. Cline
AU  - Jonas Frerick
AU  - Sebastian A. Naja
AU  - Yong Xu
PY  - 2026
DA  - 2026/10/02
PB  - arXiv
DO  - 10.48550/arxiv.2610.03455
UR  - https://arxiv.org/abs/2610.03455
AB  - B-mesogenesis is a low-temperature baryogenesis mechanism, that uses CP-violation of the B mesons in the standard model to fulfill the Sakharov conditions. It requires a late period of matter domination by a scalar field Φ that decays into bb̅ quarks, reheating the Universe below the QCD phase transition. We investigate the impact of this mechanism on Big Bang Nucleosynthesis, with respect to the reheating temperature T_rh, and the mass of Φ. Injection of hadrons skewing neutron/proton interconversions are the most important effect, followed by neutrino heating from Φ decays. For M_Φ≲ 100GeV, T_rh must be ≳ 10MeV.
ER  -