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Investigation of single spin asymmetries in pi⁺ electroproduction

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arxiv hep-ph/0010261 v1 pith:DTDH23M4 submitted 2000-10-22 hep-ph hep-ex

Investigation of single spin asymmetries in pi⁺ electroproduction

classification hep-ph hep-ex
keywords asymmetrieslongitudinallypolarizedsinglespinapproachesapproximationavailable
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The azimuthal single target-spin asymmetries for pi^{+} production in semi-inclusive deep inelastic scattering of leptons off longitudinally polarized protons are evaluated using two main approaches available in the literature. It is shown that the approximation where the twist-2 transverse quark spin distribution in the longitudinally polarized nucleon is small enough to be neglected leads to a consistent description of all existing asymmetries observed by the HERMES experiment.

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