Running coupling in electroweak interactions of leptons from f(R)-gravity with torsion Salvatore Capozziello, Mariafelicia Laurentis, Luca Fabbri and Stefano Vignolo Eur. Phys. J. C, 72 2 (2012) 1908 Published online: 24 February 2012 DOI: 10.1140/epjc/s10052-012-1908-2