Transversity Distribution and Polarized Fragmentation Function from Semi-inclusive Pion Electroproduction

Abstract

A method is discussed to determine the hitherto unknown u-quark transversity distribution from a planned HERMES measurement of a single-spin asymmetry in semi-inclusive pion electroproduction off a transversely polarized target. Assuming u-quark dominance, the measurement yields the shapes of the transversity distribution and of the ratio of a polarized and the unpolarized u-quark fragmentation functions. The unknown relative normalization can be obtained by identifying the transversity distribution with the well-known helicity distribution at large x. The systematic uncertainty of the method is dominated by the assumption of u-quark dominance.

5 pages, 5 figures, revised version as will be published in EPJ C

Cited by in corpus (27)

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• Azimuthal Spin Asymmetries of Pion Electroproduction
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• Azimuthal single spin asymmetries in SIDIS in the light of chiral symmetry breaking
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• Soft-Gluon-Pole Contribution in Single Transverse-Spin Asymmetries of Drell-Yan Processes
• Single Transverse Spin Asymmetries at Parton Level
• The Spin Structure of the Proton and Polarized Collider Physics
• Partonic State and Single Transverse Spin Asymmetries in Semi Inclusive DIS
• Single-spin asymmetries in electroproduction of pions on the longitudinally polarized nucleon targets
• Single Target-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering on Transversely Polarized Nucleon Target
• Collinear Factorization for Single Transverse-Spin Asymmetry in Drell-Yan Processes
• European Perspectives for Electron-Nucleon Scattering at the Luminosity Frontier
• Q^2 dependence of azimuthal asymmetries in semi-inclusive deep inelastic scattering and in Drell-Yan
• Single spin asymmetries in QCD
• Origins of single transverse spin asymmetries
• Status of Spin Physics - Experimental Summary
• On the anomalous dimension for the transversity distribution