Abstract
We propose a new mechanism for baryogenesis, in which baryon asymmetry is
generated by absorption of a new particle $X$ carrying baryon number onto
Primordial Black Holes (PBHs). Due to CP violation of $X$ and $X$
scattering with the plasma surrounding PBHs, the two conjugate particles are
differently absorbed by PBHs, leading to the production of an asymmetry in the
$X$ sector. The production is halted by PBH evaporation, after which the
asymmetry is transferred into the baryonic sector via $X$ decay. We show that
this mechanism can produce the correct amount of asymmetry without violating
the known constraints on PBHs concentration. Furthermore, we provide a
systematic study of the parameter space, identifying the regions leading to the
production of the correct baryon asymmetry.
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