Measurement of the Target-Normal Single-Spin Asymmetry A_yⁿ in the Deep Inelastic Region from the Reaction ³He^↑(e,e')

Thesis/Dissertation · Sat Jan 01 00:00:00 EST 2011

DOI:https://doi.org/10.2172/1133077· OSTI ID:1133077

Katich, Joseph ^[1]

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1. Coll. of William and Mary, Williamsburg, VA (United States)

A first measurement of the inclusive target single-spin asymmetry, Aⁿ_y, has been performed in deep-inelastic scattering of electrons from a ³He target polarized normal to the electron scattering plane. This asymmetry is void of contributions at the Born level, and thus is a direct observable for two-photon physics. The experiment was performed in Hall A at Thomas Jefferson National Accelerator Facility from October 2008 through early February 2009. The measurement is the first from a polarized neutron target. The final overall precision is several times better than previously existing SLAC proton data, and significantly extends the kinematic range over which the asymmetry has been measured. The asymmetry was measured at five kinematic points in the deep inelastic scattering region covering Q² = 1 - 3 GeV² and x_B = 0.16 to 0.41. The asymmetry varied from 0.006 to 0.071 with astatistical precision at the 10^-2 level.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1133077
• Report Number(s): JLAB-PHY-11-1564; DOE/OR/23177-3085; TRN: US1400441
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS