Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-03-23
Phys.Rev.Lett.105:262002,2010
Physics
High Energy Physics
High Energy Physics - Experiment
Scientific paper
10.1103/PhysRevLett.105.262002
We report the first measurement of the transverse momentum dependence of double spin asymmetries in semi-inclusive production of pions in deep inelastic scattering off the longitudinally polarized proton. Data have been obtained using a polarized electron beam of 5.7 GeV with the CLAS detector at the Thomas Jefferson National Accelerator Facility (JLab). A significant non-zero $\sin2\phi$ single spin asymmetry was also observed for the first time indicating strong spin-orbit correlations for transversely polarized quarks in the longitudinally polarized proton. The azimuthal modulations of single spin asymmetries have been measured over a wide kinematic range.
Adhikari K. P.
Aghasyan Mher M.
Amaryan M.
Anghinolfi Marco
Avakian Harut
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