Abstract
We report measurements of target- and double-spin asymmetries for the exclusive channel in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3, and 3.0 GeV. The new results are consistent with previous CLAS publications but are extended to a low range from 0.0065 to . The access was made possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low as . These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis prediction from SAID, and the dynamic model DMT. In many kinematic regions our results, in particular results on the target asymmetry, help to constrain the polarization-dependent components of these models.
8 More- Received 13 July 2016
DOI:https://doi.org/10.1103/PhysRevC.94.045206
©2016 American Physical Society