Interference Fragmentation Functions and Valence Quark Spin Distributions in the Nucleon
R. L. Jaffe, Xuemin Jin, Jian Tang
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.
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