  In the presence of a curved space-time with torsion, the divergence of the
leptonic current gets new contributions from the curvature and the torsion in
addition to those coming from the electroweak fields. However it is possible to
define a new lepton current which is gauge and local Lorentz invariant whose
divergence gets no contribution from the torsion. Therefore we argue that
torsion does not contribute to anomalous lepton number production
