The Double Spin Asymmetry in Exclusive {pi}{sup +} Electroproduction with CLAS

Journal Article · Tue Aug 04 00:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3215667· OSTI ID:21316931

Pierce, Joshua ^[1]

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1. University of Virginia, Charlottesville Virginia and Oak Ridge National Laboratory, Oak Ridge Tennessee (United States)

The eglb run at Jefferson Lab used the CLAS detector in Hall B along with a 1.6 GeV-5.6 GeV polarized electron beam and polarized nuclear targets (composed of NH{sub 3} and ND{sub 3}) to measure single and double spin asymmetries. This analysis is of the double and single spin asymmetries in the exclusive electro-production of positive pions (ep{yields}e{pi}{sup +}n). The asymmetries were measured as a function of W, Q{sup 2}, cos {theta}*, and {phi}*. The value of these asymmetries can be used to help determine the spin structure of the resonances in the baryon resonance region. Preliminary results for the asymmetries are shown.

• OSTI ID: 21316931
• Journal Information: AIP Conference Proceedings, Vol. 1149, Issue 1; Conference: 18. international spin physics symposium, Charlottesville, VA (United States), 6-11 Oct 2008; Other Information: DOI: 10.1063/1.3215667; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BARYONS
CEBAF ACCELERATOR
DEUTERIUM TARGET
ELECTRON BEAMS
ELECTRON-PROTON INTERACTIONS
ELECTROPRODUCTION
FOUR MOMENTUM TRANSFER
GEV RANGE
HYDROGEN 1 TARGET
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PIONS PLUS
POLARIZATION
POLARIZED BEAMS
POLARIZED TARGETS
QUANTUM CHROMODYNAMICS
RESONANCE PARTICLES
SPIN