A mechanism for the T-odd pion fragmentation function

Abstract

We consider a simple rescattering mechanism to calculate a leading twist $T$-odd pion fragmentation function, a favored candidate for filtering the transversity properties of the nucleon. We evaluate the single spin azimuthal asymmetry for a transversely polarized target in semi-inclusive deep inelastic scattering (for HERMES kinematics). Additionally, we calculate the double $T$-odd $\cos 2\varphi$ asymmetry in this framework.

Comments: 6 pages revtex, 7 eps figures, references added and updated in this published version