Single-spin asymmetries in semi-inclusive pion production

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.

6 pages, contribution to the proceedings for the 21st Winter Workshop on Nuclear Dynamics

References in corpus (3)

• Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target
• On the analysis of lepton scattering on longitudinally or transversely polarized protons
• The HERMES Polarized Hydrogen and Deuterium Gas Target in the HERA Electron Storage Ring