Transversity and Collins functions from SIDIS and e+e- data

被引：325

作者：

Anselmino, M.

Boglione, M.

D'Alesio, U.

Kotzinian, A.

Murgia, F.

Prokudin, A.

Turk, C.

机构：

[1] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[2] Sez Torino, Ist Nazl Fis Nucl, I-10125 Turin, Italy

[3] Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy

[4] Sez Cagliari, Ist Nazl Fis Nucl, I-10125 Turin, Italy

[5] Yerevan Phys Inst, Yerevan 375036, Armenia

[6] JINR, Dubna 141980, Russia

来源：

PHYSICAL REVIEW D | 2007年 / 75卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.75.054032

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A global analysis of the experimental data on azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS), from the HERMES and COMPASS Collaborations, and in e(+)e(-)-> h(1)h(2)X processes, from the Belle Collaboration, is performed. It results in the extraction of the Collins fragmentation function and, for the first time, of the transversity distribution function for u and d quarks. These turn out to have opposite signs and to be sizably smaller than their positivity bounds. Predictions for the azimuthal asymmetry A(UT)(S)(sin(phi)+phi(h)), as will soon be measured at JLab and COMPASS operating on a transversely polarized proton target, are then presented.

引用

页数：14

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