Precision Measurements of the Proton and Deuteron Polarized Structure Functions [electronic resource]
Experiment E155 at the Stanford Linear Accelerator Center measured the longitudinal and transverse polarized deep-inelastic scattering asymmetries for the proton and deuteron using longitudinally-polarized electron beams with energies of 48.3 GeV and 38.8 GeV, respectively. The electron beam polariz...
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| Online Access: |
Online Access (via OSTI) |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2003.
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| Subjects: |
| Summary: | Experiment E155 at the Stanford Linear Accelerator Center measured the longitudinal and transverse polarized deep-inelastic scattering asymmetries for the proton and deuteron using longitudinally-polarized electron beams with energies of 48.3 GeV and 38.8 GeV, respectively. The electron beam polarization was measured by Moeller polarimetry to be 0.81 ± 0.02. Dynamically-polarized solid ¹⁵NH₃ and ⁶Li²H were used as the target materials. The scattered electrons were detected in three independent spectrometers at 2.75{sup o}, 5.5{sup o}, and 10.5{sup o}, covering a kinematic range of 0.014 ≤ x ≤ 0.9 and 1.0(GeV/c)² ≤ Q² ≤ 40(GeV/c)². The 10.5{sup o} spectrometer was constructed for this experiment. The structure functions G₁{sup p} and G₁{sup d} were extracted from the asymmetry data, and, in combination with world data, were fit in next-to-leading order perturbative QCD. The Q² dependence of g₁ differed slightly from that of F₁. The g₁ results are consistent with the Bjorken sum rule. The structure functions g₂{sup p} and g₂{sup d} were extracted from the asymmetry data, and were used to extract the twist-3 reduced matrix elements d₂{sup p}, d₂{sup d}, and d₂ⁿ |
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| Item Description: | Published through SciTech Connect. 11/06/2003. "slac-r-564" King, P. |
| Physical Description: | 109 pages : digital, PDF file. |