Abstract
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.
Original language | English |
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Pages (from-to) | 357-373 |
Number of pages | 17 |
Journal | Nuclear Physics A |
Volume | 748 |
Issue number | 3-4 |
DOIs | |
State | Published - Feb 21 2005 |
Bibliographical note
Funding Information:This work was supported in part by the Instituto Nazionale di Fisica Nucleare, the French Centre National de la Recherche Scientifique, the French Commissariat à l’En-ergie Atomique, the US Department of Energy, the National Science Foundation, Emmy Noether grant from the Deutsche Forschungsgemeinschaft, the Korean Science and Engineering Foundation and the UK’s Engineering and Physical Sciences Research Council. The Southeastern Universities Research Association (SURA) operates the Thomas Jefferson National Accelerator Facility for the United States Department of Energy under contract DE-AC05-84ER40150.
Keywords
- 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