Beam spin asymmetries from semi-inclusive pion electroproduction in deep inelastic scattering

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

DOI:https://doi.org/10.1063/1.3215689· OSTI ID:21316953

Gohn, W; Joo, K; Ungaro, M ^[1]; Avakian, H ^[2]

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1. University of Connecticut, Storrs, CT (United States)
2. Jefferson Lab, Newport News, VA (United States)

Measurements of beam-spin asymmetries from semi-inclusive pion electro-production in deep inelastic scattering (DIS) have been performed. Data were taken with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab using a 5.7 GeV longitudinally polarized electron beam and an unpolarized liquid hydrogen target. All three pion channels ({pi}{sup +}, {pi}{sup 0} and {pi}{sup -}) were measured simultaneously over a large range of kinematics at the intermediate Q{sup 2} range (Q{sup 2}{approx_equal}1-3 GeV{sup 2}). We present our preliminary studies of single-spin azimuthal asymmetries of the two charged pion channels as functions of z and P{sub T}. This new high statistical data will provide important means of studying physics underlying the spin structure of the nucleon.

• OSTI ID: 21316953
• 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: 10.1063/1.3215689; (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
CEBAF ACCELERATOR
DEEP INELASTIC SCATTERING
ELECTRON BEAMS
ELECTROPRODUCTION
FOUR MOMENTUM TRANSFER
GEV RANGE
MULTIPARTICLE SPECTROMETERS
NUCLEONS
PARTICLE IDENTIFICATION
PARTICLE STRUCTURE
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
POLARIZATION
POLARIZED BEAMS
SPIN