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Transversity and single spin asymmetries

O. V. Teryaev
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Abstract

The transverse spin of interacting light quarks is described by two independent non-perturbative inputs, twist-2 transversity and twist-3 quark-gluon correlators, while for free massive quarks they are related by the equations of motion. Similar relation emerges also in a model, where quark-hadron transition is treated in a probabilistic way. The single spin asymmerty in SIDIS appears due to the interplay of transverity with Collins fragmentation function, which appears to be of twist 3, when defined in a Lorentz invariant way.

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O. V. Teryaev. 2003-10-06. Transversity and single spin asymmetries. https://arxiv.org/abs/hep-ph/0310069

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