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Azimuthal single spin asymmetries in SIDIS in the light of chiral symmetry breaking

✍ Scribed by P. Schweitzer; A. Bacchetta

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
338 KB
Volume
732
Category
Article
ISSN
0375-9474

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✦ Synopsis

An attempt is made to understand the z-dependence of the azimuthal single spin asymmetries observed by the HERMES Collaboration in terms of chiral models based on effective quark and Goldstone boson degrees of freedom. The effects of respectively neglecting and considering Gaussian intrinsic parton transverse momenta and the Sivers effect are explored. Predictions for the transverse target polarization experiment at HERMES are presented.

πŸ“œ SIMILAR VOLUMES

UA(1) symmetry breaking, scalar mesons a
UA(1) symmetry breaking, scalar mesons and the nucleon spin problem in an effective chiral field theory
✍ V. DmitraΕ‘inoviΔ‡ πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 133 KB

We establish a relationship between the scalar-meson spectrum and the U A (1) symmetry-breaking 't Hooft interaction on one hand and the constituent-quark flavor singlet axial coupling constant g (0) A,Q on the other, using an effective chiral quark field theory. This analysis leads to the new sum