| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8200831 | Physics Letters B | 2006 | 5 Pages |
Abstract
We investigate the origin of the cos2Ï azimuthal asymmetry in unpolarized semi-inclusive DIS. The contributions to this asymmetry arising from the intrinsic transverse motion of quarks are explicitly evaluated, and predictions for the HERMES and COMPASS kinematic regimes are presented. We show that the effect of the leading-twist Boer-Mulders function h1â¥(x,kT2), which describes a correlation between the transverse momentum and the transverse spin of quarks, is quite significant and may also account for a part of the cos2Ï asymmetry measured by ZEUS in the perturbative domain.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Vincenzo Barone, Zhun Lu, Bo-Qiang Ma,