Work

On the dilation current in metric-affine gravity

Year: 2024

Type: article

Abstract: We review F(R,D) gravity in the metric-affine framework, where D is the divergence of the dilation current appearing in the hypermomentum tensor. We assume only linear couplings between the general affine connection and the matter fields (minimal coupling) and break projective invariance to preserve a nonvanishing dilation current. For F(R,D) linear in D the dilation current dependence in the function F(R,D) does not contribute to the field equations of the theory. We show that, on the other hand, in more complicated cases (e.g., considering the function F(R,D)=R+αD2), the D contribution to the metric field equations is nontrivial and can affect the cosmology of the theory.

Source: Annals of Physics

DOI: 10.1016/j.aop.2024.169664

Authors: D. Kenzhalin, S. Myrzakul, R. Myrzakulov, L. Ravera

Institutions: L. N. Gumilyov Eurasian National University, Politecnico di Torino, Istituto Nazionale di Fisica Nucleare, Sezione di Torino

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,770

Funders: Ministry of Education and Science of the Republic of Kazakhstan, Instituto Nazionale di Fisica Nucleare