TY - JOUR

T1 - Gravitational Baryogenesis: Problems and Possible Resolution

AU - Arbuzova, Elena

AU - Dolgov, Alexander

AU - Dutta, Koushik

AU - Rangarajan, Raghavan

N1 - The work of E.A. and A.D. was funded by RSF grant number 22-12-00103. The work of K.D. and R.R. was partially supported by the Department of Science and Technology, Government of India under the Indo-Russian call for Joint Proposals (DST/INT/RUS/RSF/P-21). The work of K.D. was also partially supported by the grant MTR/2019/000395 and Core Research Grant CRG/2020/004347 funded by SERB, DST, Government of India. Публикация для корректировки.

PY - 2023/2

Y1 - 2023/2

N2 - 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 (Formula presented.) 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.

AB - 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 (Formula presented.) 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.

KW - baryogenesis

KW - baryonic number

KW - modified gravity

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85149200410&origin=inward&txGid=dca046836aea4b43d73aa22363ad2432

UR - https://www.mendeley.com/catalogue/5fb9a714-7028-3c49-862b-ec7b9027f467/

U2 - 10.3390/sym15020404

DO - 10.3390/sym15020404

M3 - Article

VL - 15

JO - Symmetry

JF - Symmetry

SN - 2073-8994

IS - 2

M1 - 404

ER -