Measurements of the angular distributions of target and double-spin asymmetries for the Δ + (1232) in the exclusive channel p →(e→,e′p)π0 obtained at the Jefferson Lab in the Q2 range from 0.5 to 1.5 GeV2/c 2 are presented. Results of the asymmetries are compared with the unitary isobar model [D. Drechsel et al., Nucl. Phys. A645, 145 (1999)], dynamical models [T. Sato and T. S. Lee, Phys. Rev. C 54, 2660 (1996); S. S. Kamalov et al., Phys. Lett. B 27, 522 (2001)], and the effective Lagrangian theory [R. M. Davidson et al., Phys. Rev. D 43, 71 (1991)]. Sensitivity to the different models was observed, particularly in relation to the description of background terms on which the target asymmetry depends significantly.
|Original language||English (US)|
|Number of pages||3168194|
|Journal||Physical Review C - Nuclear Physics|
|State||Published - Sep 2003|
ASJC Scopus subject areas
- Nuclear and High Energy Physics