Speaker
Alexei Prokudin
(Jefferson Lab)
Description
We attempt an extraction of the pretzelosity distribution ($h^{\perp}_{1T}$) from preliminary COMPASS, HERMES, and JLAB experimental data on
$\sin(3\phi_h - \phi_S)$ 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.
Author
Alexei Prokudin
(Jefferson Lab)
Co-author
Christopher Lefky
(Creighton University, Omaha, Nebraska 68102, USA)
