Nucleon resonance electroproduction at high momentum transfers: Results from SLAC experiment E140X

Journal Article · Mon Jul 10 04:00:00 EDT 1995 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.48486· OSTI ID:165555

Keppel, C ^[1]

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1. Virginia Union University, Richmond, Virginia 23220 (United States)

Measurements of nucleon resonance cross sections for large angle (14{degree}{lt}{theta}{lt}61{degree}) electron scattering from deuterium and hydrogen were obtained for incident energies of 2{lt}{ital E}{sub 0}{lt}9.75GeV. Scattered electrons were detected in both the 8 GeV and 1.6 GeV spectrometers in SLAC End Station A. The cross sections were used in conjunction with previous SLAC data to perform Rosenbluth type separations and to measure the longitudinal component of the cross sections. {ital R}={sigma}{sub {ital L}}/{sigma}{sub {ital T}}, the ratio of the longitudinal and transverse components of the cross section, is found to be small throughout the entire resonance region (1{lt}{ital W}{sup 2}{lt}4GeV{sup 2}). A global fit to all available SLAC resonance region data has been developed. The Delta P{sub 33}(1232) resonance form factor is extracted and is found to fall off faster than {ital Q}{sup {minus}4}, but not as fast as had been previously observed. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• Sponsoring Organization: USDOE
• OSTI ID: 165555
• Report Number(s): CONF-940514--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 338; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANGULAR DISTRIBUTION
CROSS SECTIONS
DEUTERIUM TARGET
ELECTRON REACTIONS
FORM FACTORS
GEV RANGE 01-10
HYDROGEN 1 TARGET
RESONANCE SCATTERING
ROSENBLUTH FORMULA