Work

Gravitational Baryogenesis: Problems and Possible Resolution

Year: 2023

Type: article

Abstract: 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 the modification of gravity, introducing an R2 term into the canonical action of GR. It is shown that this mechanism allows for the stabilization of GBG with bosonic and fermionic baryon currents. We establish the region of the model parameters leading to the stabilization of R. Still, the standard cosmology would be noticeably modified.

Source: Symmetry

DOI: 10.3390/sym15020404

Authors: Elena Arbuzova, Alexander Dolgov, Koushik Dutta, Raghavan Rangarajan

Institutions: Novosibirsk State University, Dubna State University, Joint Institute for Nuclear Research, Indian Institute of Science Education and Research Kolkata, Ahmedabad University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,224

Funders: Department of Science and Technology, Ministry of Science and Technology, India, Russian Science Foundation, Science and Engineering Research Board