Evidence for a Transverse Single-Spin Asymmetry in Leptoproduction of pi+pi- Pairs
High Energy Physics - Experiment
2009-03-19 v2
Abstract
A single-spin asymmetry was measured in the azimuthal distribution of pi+pi- pairs produced in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target. For the first time, evidence is found for a correlation between the transverse target polarization and the azimuthal orientation of the plane containing the two pions.The corresponding single-spin asymmetry is expected to be related to the product of the little-known quark transversity distribution function and an unknown naive-T-odd chiral-odd dihadron fragmentation function.
Keywords
Cite
@article{arxiv.0803.2367,
title = {Evidence for a Transverse Single-Spin Asymmetry in Leptoproduction of pi+pi- Pairs},
author = {HERMES Collaboration and A. Airapetian},
journal= {arXiv preprint arXiv:0803.2367},
year = {2009}
}
Comments
18 pages, 4 figures, 1 table; minor revisions to content for clarity