Torsional four-fermion interaction and the Raychaudhuri equationShibendu Gupta Choudhury, Sagar Kumar Maity and Amitabha LahiriEur. Phys. J. C, 84 12 (2024) 1304DOI: https://doi.org/10.1140/epjc/s10052-024-13618-4