Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprc10003j&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
This experiment measures beam spin asymmetries in p( e,e'p)π^o in the Δ(1232) region for Q^2=0.3 - 0.9 (GeV)^2. Single pion electroproduction in the the Δ(1232) resonance region has been studied as a means of exploring the physics underlying the structure of the nucleon. Most previous measurements have focused on unpolarized cross section measurements in this resonance region. A new experiment using CLAS at Jefferson Lab/Hall B has measured beam spin asymmetries over a large kinematic range. The high statistical accuracy of this data set provides new and unique information on the non-resonant amplitudes such as Born terms and contributions from higher resonances by utilizing the interference between large resonant and small non-resonant amplitudes. This information is not available from unpolarized cross section measurements. Preliminary results of a partial wave analysis will be presented as well.
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