| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9851088 | Nuclear Physics A | 2005 | 4 Pages |
Abstract
Azimuthal asymmetries are observed in the cross section of semi-inclusive charged pion electroproduction from a transversely polarized hydrogen target at Hermes. Their si- multaneous dependence on the azimuthal angles of both the pion and the target spin axis allows the extraction of two Fourier components that are interpreted in terms of Collins and Sivers effects. For Ï+-production both components are found to be positive, while for Ïâ-production the Sivers asymmetry vanishes and the Collins asymmetry is found to be negative and surprisingly large in magnitude.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
W.-D. Nowak, the Hermes collaboration the Hermes collaboration,