Cosmology constrains gravitational four-fermion interaction

I.B Khriplovich, A.S Rudenko
2012 Journal of Cosmology and Astroparticle Physics  
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-Robertson-Walker (FRW) cosmology for the spatial flat or closed Universe. In principle, the anomalous, vector-vector interaction could restore the agreement.
doi:10.1088/1475-7516/2012/11/040 fatcat:rwipc6ztazdazk7t7ywd7jga2a