Realistic estimate of valence transversity distributions from inclusive dihadron production
| Autor: | Radici, Marco, Courtoy, A., Bacchetta, Alessandro, Guagnelli, Marco |
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| Rok vydání: | 2015 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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. Comment: 24 pages, 11 figures of which 7 have two panels; figs. 8a,8b,9a,9b updated with latest results from Ref.[5]; JHEP style file provided |
| Databáze: | arXiv |
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