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Single positive pion electroproduction in the first and second resonance regions using CLAS
Egiyan, Hovanes
Egiyan, Hovanes
Abstract
The study of single pion electroproduction can provide valuable information on the structure of the nucleon and its excited states. Although these reactions have been studied for decades, never has the npi + channel been measured over the complete phase space of the reaction. The CEBAF Large Acceptance Spectrometer (CLAS) located in Hall B of Jefferson Lab is well-suited for conducting these measurements. The CLAS data were taken using a 1.515 GeV electron beam incident on a liquid H 2 target. The cross sections have been extracted, and their &phis;-dependence has been fit to obtain the sigmaTT, sigma TL and the sigmaT + epsilonsigma L linear combination of the structure functions. An analysis program based on the Mainz unitary isobar model was used to analyze the experimental data from the pi+ channel only. The resonant amplitudes for P33(1232), S11(1535) and D13(1520) were obtained from the fit.
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2001-01-01
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3037354.pdf
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Physics
DOI
https://dx.doi.org/doi:10.21220/s2-v392-2w92