Single-spin Azimuthal Asymmetries in the ``Reduced Twist-3 Approximation''

Details Single-spin Azimuthal Asymmetries in the ``Reduced Twist-3 Approximation'' Single-spin Azimuthal Asymmetries in the ``Reduced Twist-3 Approximation''

2000-02-08

arxiv.org/abs/hep-ph/0002091v2

Phys.Lett. B483 (2000) 69-73

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 2 figures, typos corrected, very small changes to text, reference added

Scientific paper

10.1016/S0370-2693(00)00596-7

We consider the single-spin azimuthal asymmetries recently measured at the HERMES experiment for charged pions produced in semi-inclusive deep inelastic scattering of leptons off longitudinally polarized protons. Guided by the experimental results and assuming a vanishing twist-2 transverse quark spin distribution in the longitudinally polarized nucleon, denoted as ``reduced twist-3 approximation'', a self-consistent description of the observed single-spin asymmetries is obtained. In addition, predictions are given for the z dependence of the single target-spin asymmetry.

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