Publications
Publication Information
Title | Study of Double Spin Asymmetries in Inclusive ep Scattering at Jefferson Lab |
Authors | Hoyoung Kang |
JLAB number | JLAB-PHY-14-2001 |
LANL number | (None) |
Other number | DOE/OR/23177-3456 |
Document Type(s) | (Thesis) |
Associated with EIC: | No |
Supported by Jefferson Lab LDRD Funding: | No |
Thesis A PHD thesis Advisor(s) : Seonho Choi (Seoul National University) | |
Publication Abstract: | The spin structure of the proton has been investigated in the high Bjorken x and low momentum transfer Q^2 region. We used Jefferson Lab's polarized electron beam, a polarized target, and a spectrometer to get both the parallel and perpendicular spin asymmetries Apar and Aperp. These asymmetries produced the physics asymmetries A_1 and A_2 and spin structure functions g_1 and g_2. We found Q^2 dependences of the asymmetries at resonance region and higher-twist effects. Our result increases the available data on the proton spin structure, especially at resonance region with low Q^2. Moreover, A_2 and g_2 data show clear Q^2 evolution, comparing with RSS and SANE-BETA. Negative resonance in A_2 data needs to be examined by theory. It can be an indication of very negative transverse-longitudinal interference contribution at W ~ 1.3 GeV. Higher twist effect appears at the low Q^2 of 1.9 GeV^2, although it is less significant than lower Q^2 data of RSS. Twist03 matrix element d_2 was calculated using our asymmetry fits evaluation at Q^2 1.9 GeV^2. D-bar_2 = -0.0087±0.0014 was obtained by integrating 0.47 ? x ? 0.87. |
Experiment Numbers: | E07-003 |
Group: | Hall C |
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DOI: | |
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