Comparative analysis of the transversities and the longitudinally polarized distribution functions of the nucleon

Details Comparative analysis of the transversities and the longitudinally polarized distribution functions of the nucleon Comparative analysis of the transversities and the longitudinally polarized distribution functions of the nucleon

2007-05-21

arxiv.org/abs/0705.2917v1

Phys.Lett.B653:398-403,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 2 figures

Scientific paper

10.1016/j.physletb.2007.08.013

A first empirical extraction of the transversity distributions for the $u$- and $d$-quarks has been done by Anselmino {\it et al.} based on the combined global analysis of the measured azimuthal asymmetries in semi-inclusive deep inelastic scatterings and those in $e^+ e^- \to h_1 h_2 X$ processes. Although with large uncertainties, the determined transversity distributions already appear to reveal a remarkable qualitative difference with the corresponding longitudinally polarized distributions. We point out that this difference contains very important information on internal spin structure of the nucleon.

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