Spin structure of the proton and the Q² evolution of the Gerasimov-Drell-Hearn integral
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50421054-MIT.pdf
Description
Full printable version
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9.75 MB
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Checksum (MD5)
553675a47cfba376db9c7c8bdfa5c440
Author(s)
Skabelin, Alexander (Alexander Vladimirovich), 1973-
Advisor(s)
William Bertozzi.
Date Issued
2002
Publisher
Massachusetts Institute of Technology
Abstract
We studied the inclusive reaction e[left arrow above] p[left arrow above] [left arrow] e'X with a 2.5GeV and a 4.2GeV incident beam of polarized electrons. The virtual photon four momentum squared, Q2, varied from 0.2GeV2/c2 to 1GeV2/c2 and the center of mass total energy W ranged up to 2GeV. The measurement was performed at the CEBAF Large Acceptance Spectrometer (CLAS) of the Thomas Jefferson National Accelerator Facility during the Fall of 1998. A cryogenic NH3 target was used as a source of protons polarized in the direction of the incident electron beam. For the first time, proton spin structure functions were studied with precision in the resonance region. The data indicate that a dramatic change in the spin structure occurs between the deep inelastic high Q2 region and the region of low Q2 where photons become nearly real.
Description
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2002.
Includes bibliographical references (p. 167-172).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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