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Single-spin asymmetries in semi-inclusive pion production

U. Elschenbroich
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Abstract

For the first time single-spin asymmetries in semi-inclusive pion production are measured by the HERMES experiment with a transversely polarised hydrogen target. Two different sine-modulations are extracted which can be related to the transversity δq(x) and Sivers f_{1T}^{\perp q}(x) quark distribution functions. The extracted sine-moments still contain small sub-leading twist contributions which can be extracted from HERMES data combining the results from the transversely polarised hydrogen target with previously measured results from a longitudinally polarised hydrogen target.

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U. Elschenbroich. 2005-04-14. Single-spin asymmetries in semi-inclusive pion production. https://doi.org/10.1556/aph.25.2006.2-4.24

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