Precise measurements of beam spin asymmetries in semi-inclusive π0 production
- Aghasyan, M.
- Avakian, H.
- Rossi, P.
- De Sanctis, E.
- Hasch, D.
- Mirazita, M.
- Adikaram, D.
- Amaryan, M. J.
- Biselli, Angela
- CLAS Collaboration
DOIAbstract
We present studies of single-spin asymmetries for neutral pion electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV polarized electrons from an unpolarized hydrogen target, using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. A substantial amplitude has been measured in the distribution of the cross section asymmetry as a function of the azimuthal angle of the produced neutral pion. The dependence of this amplitude on Bjorken x and on the pion transverse momentum is extracted with significantly higher precision than previous data and is compared to model calculations
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