Torsion contraints from the recent precision measurement of the muon   anomaly
  In this paper we consider non-minimal couplings of the Standard Model fermions to the vector (trace) and axial vector (pseudo-trace) components of the torsion tensor. We then evaluate the contributions of these vector and axial vector components to the muon anomaly and use the recent precision measurement of the muon anomaly to derive constraints on the torsion parameters. 
Prasanta Das (HRI), Uma Mahanta (HRI), Sreerup Raychaudhuri (IITK)