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Measurement of the Proton A1 and A2 Spin Asymmetries: Probing Color Forces

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 dp2 (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, Ak and A⊥ were measured using the BETA (Big Electron Telescope Array) Detector. BETA consisted of a scintillator hodoscope, gas ˇCerenkov counter, lucite hodoscope and a large lead glass electromagnetic calorimeter. With a unique open geometry, a threshold gas ˇCerenkov detector allowed BETA to cleanly identify electrons for this inclusive experiment. A measurement of dp2 is compared to lattice QCD calculations. / Physics

Identiferoai:union.ndltd.org:TEMPLE/oai:scholarshare.temple.edu:20.500.12613/2560
Date January 2015
CreatorsArmstrong, Whitney Richard
ContributorsMeziani, Zein-Eddine, Metz, Andreas, Sparveris, Nikolaos, Surrow, Bernd, Jones, Mark
PublisherTemple University. Libraries
Source SetsTemple University
LanguageEnglish
Detected LanguageEnglish
TypeThesis/Dissertation, Text
Format193 pages
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Relationhttp://dx.doi.org/10.34944/dspace/2542, Theses and Dissertations

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