Measurement of the polarized structure function {sigma}{sub LT{sup '}} for p(e-vector,e{sup '}{pi}{sup +})n in the {delta}(1232) resonance region

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.70.042201· OSTI ID:20695629

Joo, K; Ungaro, M ^[1]; Smith, L C; Minehart, R; Crabb, D; Pocanic, D; Prok, Y; Wang, K ^[2]; Aznauryan, I G; Asryan, G; Egiyan, K S ^[3]; Burkert, V D; Brooks, W K; Cords, D; Degtyarenko, P V; Deur, A; Egiyan, H; Feuerbach, R J; Guo, L; Gyurjyan, V ^[4]

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1. University of Connecticut, Storrs, Connecticut 06269 (United States)
2. University of Virginia, Charlottesville, Virginia 22901 (United States)
3. Yerevan Physics Institute, 375036 Yerevan (Armenia)
4. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States); and others

The polarized longitudinal-transverse structure function {sigma}{sub LT{sup '}} has been measured using the p(e-vector,e{sup '}{pi}{sup +})n reaction in the {delta}(1232) resonance region at Q{sup 2}=0.40 and 0.65 GeV{sup 2}. No previous {sigma}{sub LT{sup '}} data exist for this reaction channel. The kinematically complete experiment was performed at the Jefferson Lab with the CEBAF large acceptance spectrometer using longitudinally polarized electrons at an energy of 1.515 GeV. A partial-wave analysis of the data shows generally better agreement with recent phenomenological models of pion electroproduction compared to the previously measured {pi}{sup 0}p channel. A fit to both {pi}{sup 0}p and {pi}{sup +}n channels using a unitary isobar model suggests the unitarized Born terms provide a consistent description of the nonresonant background. The t-channel pion pole term is important in the {pi}{sup 0}p channel through a rescattering correction, which could be model dependent.

• OSTI ID: 20695629
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 70; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CEBAF ACCELERATOR
DELTA-1232 BARYONS
ELECTRON BEAMS
ELECTRON REACTIONS
ELECTRON-PROTON INTERACTIONS
ELECTRONS
ELECTROPRODUCTION
GEV RANGE
HYDROGEN 1 TARGET
ISOBAR MODEL
MULTIPARTICLE SPECTROMETERS
NEUTRONS
PARTIAL WAVES
PIONS PLUS
POLARIZATION
POLARIZED BEAMS
RESCATTERING
RESONANCE PARTICLES
STRUCTURE FUNCTIONS
T CHANNEL