Dihadron Fragmentation Functions and Transversity

被引：2

作者：

Radici, Marco ^{[1
]}

Courtoy, A. ^{[2
]}

Bacchetta, Alessandro ^{[1
,3
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[2] Univ Liege, AGO Dept, IFPA, B-4000 Liege, Belgium

[3] Univ Pavia, Dipartmento Fis, I-27100 Pavia, Italy

来源：

4TH INTERNATIONAL WORKSHOP ON TRANSVERSE POLARISATION PHENOMENA IN HARD PROCESSES (TRANSVERSITY 2014) | 2015年 / 85卷

关键词：

D O I：

10.1051/epjconf/20158502025

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present preliminary results for 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 by HERMES and COMPASS allow for a flavor separation of the valence components of transversity, while di-hadron fragmentation functions are taken from the semi-inclusive production of two pion pairs in back-to-back jets in e(+)e(-) annihilation. The latter 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. After encoding this piece of information into the deep-inelastic scattering cross section, the transversity has been re-extracted by using the most recent and more precise COMPASS data for proton target. This picture represents the current most realistic estimate of the uncertainties on our knowledge of transversity. The preliminary results indicate that the valence up component seems smaller and with a narrower error band than in previous extraction.

引用

页数：5

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