Publications
Publication Information
| Title | Measurement of the proton A_1 and A_2 spin asymmetries: Probing Color Forces |
| Authors | Whitney Armstrong |
| JLAB number | JLAB-PHY-15-2094 |
| LANL number | (None) |
| Other number | DOE/OR/23177-3454 |
| Document Type(s) | (Thesis) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
|
Thesis A PHD thesis Advisor(s) : Zein-Eddine Meziani (Temple University) | |
| Publication Abstract: | The Spin Asymmetries of the Nucleon Experiment (SANE) measured the proton spin structure function g_2 in a range of Bjorken x, 0.3 < 0.8, where extraction of the twist-3 matrix element d_2^p (an integral of g_2 weighted by x^2) is most sensitive. The data was taken from Q^2 equal to 2.5 GeV^2 up to 6.5 GeV^2. In this polarized electron scattering off a polarized hydrogen target experiment, two double spin asymmetries, Apar and Aperp 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 d_2^p is is compared to lattice QCD calculations. |
| Experiment Numbers: | E07-003 |
| Group: | Hall C |
| Document: | |
| DOI: | |
| Accepted Manuscript: | |
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