Fermion helicity flip by parity violating torsion
arXiv:hep-th/0102073 · doi:10.1016/S0370-2693(01)00785-7
Abstract
The helicity flip of a spin-1/2 Dirac fermion interacting with a torsion- field endowed with a pseudo-tensorial extension is analysed. Taking the torsion to be represented by a Kalb-Ramond field, we show that there is a finite amplitude for helicity flip for massive fermions. The lowest order contribution is proportional to the pseudo-tensor term.
5 pages, Revtex, Two figures, Title changed in the modified version. Few discussions added.No change in the conclusion. Accepted for publication In Physics Letters B
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