Interference Fragmentation Functions and Valence Quark Spin Distributions in the Nucleon

Abstract

We explore further applications of the twist-two quark interference fragmentation functions introduced earlier. We show that semi-inclusive production of two pions in the current fragmentation region in deep inelastic scattering of a longitudinally polarized electron on a longitudinally polarized nucleon can provide a probe of the valence quark spin (or helicity difference) distribution in the nucleon.

Comments: 6 pages ReVTeX, one figure embedded An error in the earlier version is fixed