TY - JOUR

T1 - Accretion in very early Universe and charge asymmetry

AU - Pozdnyakov, N. A.

PY - 2025/5/23

Y1 - 2025/5/23

N2 - Additional elementary species and primordial black holes are common candidates for dark matter. Their co-existence in the early Universe leads to accretion if particles are heavy. We solve equation of motion affected by expansion which enhances black hole growth rates. They depend upon particles freeze-out time rather than their mass. Taking into account friction we study recently suggested baryogenesis mechanism operating via scattering cross-section difference between particles and antiparticles on relativistic symmetric plasma. We find that asymmetry is accumulated in a narrow range of times which can be used to construct viable particle models.

AB - Additional elementary species and primordial black holes are common candidates for dark matter. Their co-existence in the early Universe leads to accretion if particles are heavy. We solve equation of motion affected by expansion which enhances black hole growth rates. They depend upon particles freeze-out time rather than their mass. Taking into account friction we study recently suggested baryogenesis mechanism operating via scattering cross-section difference between particles and antiparticles on relativistic symmetric plasma. We find that asymmetry is accumulated in a narrow range of times which can be used to construct viable particle models.

KW - accretion

KW - baryon asymmetry

KW - primordial black holes

UR - https://www.mendeley.com/catalogue/c387a712-fea3-324f-a6ad-6bb2b17e6e06/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105005872026&origin=inward&txGid=00c5c47ba2886ea818b4ef1c8a037f63

U2 - 10.1088/1475-7516/2025/05/068

DO - 10.1088/1475-7516/2025/05/068

M3 - Article

VL - 2025

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 5

M1 - 0068

ER -