We attempt an extraction of the pretzelosity distribution (h1T⊥) from preliminary COMPASS, HERMES, and JLAB experimental data on sin(3ϕh−ϕS) asymmetry on proton, and effective deuteron and neutron targets. The resulting distributions, albeit with big errors, for the first time show tendency for up-quark pretzelosity to be positive and down-quark pretzelosity to be negative. A model relation of pretzelosity distribution and orbital angular momentum of quarks is used to estimate contributions of up and down quarks.
@article{arxiv.1411.0580,
title = {Extraction of the distribution function $h^{\perp}_{1T}$ from experimental data},
author = {Christopher Lefky and Alexei Prokudin},
journal= {arXiv preprint arXiv:1411.0580},
year = {2015}
}
Comments
17 pages, 9 figures, discussion of results is improved, version published in Physical Review D