Abstract
The new high statistics deuterium data set of HERMES shows significant semi-inclusive single spin asymmetries of identified pions and kaons. The asymmetries observed on the deuterium target differ from those measured on the proton target. The appearance of non-zero single spin asymmetries can be explained in terms of a non-zero transversity distribution combined with a non-zero Collins fragmentation function. However, the detailed interpretation of the data is model dependent as it turns out that the asymmetries are dominated by higher-twist effects. HERMES data that are currently being taken on a transversely polarized target will allow for a model-independent extraction of the transversity distribution.
Original language | English (US) |
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Pages (from-to) | 3737-3742 |
Number of pages | 6 |
Journal | Acta Physica Polonica B |
Volume | 33 II |
Issue number | 11 |
State | Published - Nov 2002 |
Event | X International Workshop on Deep Inelastic Scattering (DIS 2002) - Cracow, Poland Duration: Apr 30 2002 → May 4 2002 |
ASJC Scopus subject areas
- General Physics and Astronomy