Abstract
An experiment to measure single-spin asymmetries of semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized target was performed at Jefferson Laboratory in the kinematic region of and . Pretzelosity asymmetries on , which are expressed as the convolution of the transverse-momentum-dependent distribution functions and the Collins fragmentation functions in the leading order, were measured for the first time. Under the effective polarization approximation, we extracted the corresponding neutron asymmetries from the measured asymmetries and cross-section ratios between the proton and . Our results show that both on and on neutron pretzelosity asymmetries are consistent with zero within experimental uncertainties.
- Received 12 December 2013
- Revised 11 October 2014
DOI:https://doi.org/10.1103/PhysRevC.90.055209
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