2023/01/19 by E. V. Arbuzova, Arbuzova, E., A. Dolgov +5 · 1 citation
Physics and Astronomy · Earth and Planetary Sciences · #Cosmology and Gravitation Theories #Relativity and Gravitational Theory #Geophysics and Gravity Measurements
paper · pdf · doi:10.48550/arxiv.2301.08322
The coupling of baryonic current to the derivative of the curvature scalar, R, inherent to gravitational baryogenesis (GBG), leads to a fourth order differential equation of motion for R instead of the algebraic one of General Relativity (GR). The fourth-order differential equation is generically unstable. We consider a possible mechanism of stabilization of GBG by modification of gravity, introducing an R2-term into the canonical action of GR. It is shown that this mechanism allows for stabilization of GBG with bosonic and fermionic baryon currents. We have established the region of the model parameters leading to stabilization of R. Still, the standard cosmology would be noticeably modified.