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arXiv · 0812.0611

Asymmetries involving dihadron fragmentation functions: from DIS to e+e- annihilation

Alessandro Bacchetta·Federico A. Ceccopieri·Asmita Mukherjee·Marco Radici
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Abstract

Using a model calculation of dihadron fragmentation functions, we fit the spin asymmetry recently extracted by HERMES for the semi-inclusive pion pair production in deep-inelastic scattering on a transversely polarized proton target. By evolving the obtained dihadron fragmentation functions, we make predictions for the correlation of the angular distributions of two pion pairs produced in electron-positron annihilations at BELLE kinematics. Our study shows that the combination of two-hadron inclusive deep-inelastic scattering and electron-positron annihilation measurements can provide a valid alternative to Collins effect for the extraction of the quark transversity distribution in the nucleon.

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Alessandro Bacchetta, Federico A. Ceccopieri, Asmita Mukherjee, Marco Radici. 2008-12-02. Asymmetries involving dihadron fragmentation functions: from DIS to e+e- annihilation. https://doi.org/10.1103/physrevd.79.034029

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