Abstract
We study the lepto-axiogenesis scenario in the minimal supersymmetric KSVZ axion model. Only one Peccei-Quinn (PQ) field and vector-like fields are introduced besides the MSSM with the type-I see-saw mechanism. The PQ field is stabilized by the radiative correction induced by the Yukawa couplings with the vector-like fields introduced in the KSVZ model. We develop a way to follow the dynamics of the PQ field, in particular we found a semi-analytical solution which describes the rotational motion under the log-arithmic potential with including the thermalization effect via the gluon scattering which preserves the PQ symmetry. Based on the solution, we studied the baryon asymmetry, the effective number of neutrino, and the dark matter density composed of the axion and the neutralino. We found that the baryon asymmetry is successfully explained when the mass of PQ field is \( \mathcal{O} \)(106 GeV) (\( \mathcal{O} \)(105 GeV)) with the power of the PQ breaking term being 10 (8).
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Kawamura, J., Raby, S. Lepto-axiogenesis in minimal SUSY KSVZ model. J. High Energ. Phys. 2022, 116 (2022). https://doi.org/10.1007/JHEP04(2022)116
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DOI: https://doi.org/10.1007/JHEP04(2022)116
Keywords
- Cosmology of Theories beyond the SM
- Supersymmetric Standard Model