Cosmology constrains gravitational four-fermion interaction
Cosmology and Nongalactic Astrophysics
2024-01-30 v2 General Relativity and Quantum Cosmology
Abstract
If torsion exists, it generates gravitational four-fermion interaction (GFFI). This interaction gets dominating on the Planck scale. If one confines to the regular, axial-axial part of this interaction, the results do not comply with the Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmology for the spatial flat or closed Universe. In principle, the anomalous, vector-vector interaction could restore the agreement.
Cite
@article{arxiv.1210.7306,
title = {Cosmology constrains gravitational four-fermion interaction},
author = {I. B. Khriplovich and A. S. Rudenko},
journal= {arXiv preprint arXiv:1210.7306},
year = {2024}
}
Comments
Axial-axial and vector-vector contributions have been recalculated: the AA contribution is 4 times larger than in previous calculations, the VV contribution is the same, the conclusions have not changed