Single spin azimuthal asymmetries ALT′ were measured at Jefferson Lab using 2.2 and 4.4 GeV longitudinally polarised electrons incident on 4He and 12C targets in the CLAS detector. ALT′ is related to the imaginary part of the longitudinal-transverse interference and in quasifree nucleon knockout it provides an unambiguous signature for final state interactions (FSI). Experimental values of ALT′ were found to be below 5%, typically ALT′ ≤ 3% for data with good statistical precision. Optical model in eikonal approximation (OMEA) and relativistic multiple-scattering Glauber approximation (RMSGA) calculations are shown to be consistent with the measured asymmetries.
- Deduced final state interaction effects. Comparison with model predictions
- Measured single spin azimuthal asymmetries vs missing momentum, missing energy
- Nuclear reactions He, C (polarised e, e′ p), E = 2.261, 4.461 GeV
ASJC Scopus subject areas
- Nuclear and High Energy Physics