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arXiv · 1503.03495

Realistic estimate of valence transversity distributions from inclusive dihadron production

Marco Radici·A. Courtoy·Alessandro Bacchetta·Marco Guagnelli
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Abstract

We present an updated extraction of the transversity parton distribution based on the analysis of pion-pair production in deep-inelastic scattering off transversely polarized targets in collinear factorization. Data for proton and deuteron targets make it possible to perform a flavor separation of the valence components of the transversity distribution, using di-hadron fragmentation functions taken from the semi-inclusive production of two pion pairs in back-to-back jets in e+e- annihilation. The e+e- data from Belle have been reanalyzed using the replica method and a more realistic estimate of the uncertainties on the chiral-odd interference fragmentation function has been obtained. Then, the transversity distribution has been extracted by using the most recent and more precise COMPASS data for deep-inelastic scattering off proton targets. Our results represent the most accurate estimate of the uncertainties on the valence components of the transversity distribution currently available.

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Marco Radici, A. Courtoy, Alessandro Bacchetta, Marco Guagnelli. 2015-03-11. Realistic estimate of valence transversity distributions from inclusive dihadron production. https://arxiv.org/abs/1503.03495

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