SANE's Measurement of the Proton's Virtual Photon Spin Asymmetry, A^p₁, at Large Bjorken x

Thesis/Dissertation · Tue May 01 00:00:00 EDT 2012

DOI:https://doi.org/10.2172/1041534· OSTI ID:1041534

Mulholland, Jonathan ^[1]

---

1. Univ. of Virginia, Charlottesville, VA (United States)

The experiment SANE (Spin Asymmetries of the Nucleon Experiment) measured inclusive double polarization electron asymmetries on a proton target at the Continuous Electron Beam Accelerator Facility at the Thomas Jefferson National Laboratory in Newport News Virgina. Polarized electrons were scattered from a solid ¹⁴NH₃ polarized target provided by the University of Virginia target group. Measurements were taken with the target polarization oriented at 80 degrees and 180 degrees relative to the beam direction, and beam energies of 4.7 and 5.9 GeV were used. Scattered electrons were detected by a multi-component novel non-magnetic detector package constructed for this experiment. Asymmetries measured at the two target orientations allow for the extraction of the virtual Compton asymmetries A₁^p and A₂^p as well as the spin structure functions g₁^p and g₂^p. This work addresses the extraction of the virtual Compton asymmetry A₁^p in the deep inelastic regime. The analysis uses data in the kinematic range from Bjorken x of 0.30 to 0.55, separated into four Q² bins from 1.9 to 4.7 GeV².

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1041534
• Report Number(s): JLAB-PHY-12-1563; DOE/OR/23177-2174; TRN: US1202835
• Resource Relation: Related Information: University of Virginia Ph.D. Thesis, Advisor: Donal Day
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ASYMMETRY
ELECTRON BEAMS
ELECTRONS
NUCLEONS
PHOTONS
POLARIZATION
POLARIZED TARGETS
PROTONS
SPIN
STRUCTURE FUNCTIONS
TARGETS