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

被引：324
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.
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页数：14
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