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Measurement of the proton A1 and A2 spin asymmetries: Probing color forces.

机译：质子A1和A2自旋不对称的测量：探测色力。

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摘要

The Spin Asymmetries of the Nucleon Experiment (SANE) measured the proton spin structure function g2 in a range of Bjorken x, 0.3 < x < 0.8, where extraction of the twist-3 matrix element d2 p (an integral of g2 weighted by x2) is most sensitive. The data was taken from Q2 equal to 2.5 GeV 2 up to 6.5 GeV2. In this polarized electron scattering off a polarized hydrogen target experiment, two double spin asymmetries, A∥ and A⊥ were measured using the BETA (Big Electron Telescope Array) Detector. BETA consisted of a scintillator hodoscope, gas Cerenkov counter, lucite hodoscope and a large lead glass electromagnetic calorimeter. With a unique open geometry, a threshold gas Cerenkov detector allowed BETA to cleanly identify electrons for this inclusive experiment. A measurement of d2 p is compared to lattice QCD calculations.
机译：核子实验（SANE）的自旋不对称性测量了Bjorken x，0.3

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  • 作者

    Armstrong, Whitney Richard.;

  • 作者单位

    Temple University.;

  • 授予单位 Temple University.;
  • 学科 Nuclear physics and radiation.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 193 p.
  • 总页数 193
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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