<p> The Spin Asymmetries of the Nucleon Experiment (SANE) measured the proton spin structure function <i>g</i><sub>2</sub> in a range of Bjorken <i>x,</i> 0.3 < <i>x</i> < 0.8, where extraction of the twist-3 matrix element <i>d</i><sub>2</sub><i><sup> p</sup></i> (an integral of <i>g</i><sub>2</sub> weighted by <i>x</i><sup>2</sup>) is most sensitive. The data was taken from <i>Q</i><sup>2</sup> equal to 2.5 <i>GeV</i><sup> 2</sup> up to 6.5 GeV<sup>2</sup>. In this polarized electron scattering off a polarized hydrogen target experiment, two double spin asymmetries, <i> A</i>∥ and <i>A</i><sub>⊥</sub> were measured using the BETA (Big Electron Telescope Array) Detector. BETA consisted of a scintillator hodoscope, gas Čerenkov counter, lucite hodoscope and a large lead glass electromagnetic calorimeter. With a unique open geometry, a threshold gas Čerenkov detector allowed BETA to cleanly identify electrons for this inclusive experiment. A measurement of <i>d</i><sub>2</sub><i><sup> p</sup></i> is compared to lattice QCD calculations.</p>
| Identifer | oai:union.ndltd.org:PROQUEST/oai:pqdtoai.proquest.com:3702966 |
| Date | 13 June 2015 |
| Creators | Armstrong, Whitney Richard |
| Publisher | Temple University |
| Source Sets | ProQuest.com |
| Language | English |
| Detected Language | English |
| Type | thesis |
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