Source: Dissertation Abstracts International, Volume: 31-09, Section: B, page: 5550. / Thesis (Ph.D.)--The Florida State University, 1970.

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<p>This dissertation describes the first study of three-body photodisintegration of polarized 3He (&#947;3He &#8594; npp) with a circularly polarized photon beam.</p> <p>This measurement was carried out at the High Intensity &#947;-Ray Source(HI&#947;S) facility located at Duke University Free Electron Laser Laboratory and the incoming photon energy was 11.4 MeV. A high-pressure polarized 3He target based on spin exchange optical pumping (SEOP) of hybrid alkali was employed. Two methods--Nuclear Magnetic Resonance (NMR) and Electron</p> <p>Paramagnetic Resonance (EPR)--were used to measure the polarization, which was determined to be &#8764; 42%.</p> <p>The data from the experiment were analyzed and a GEANT4 simulation was carried out to determine the corrections for finite geometry, neutron multiple scattering and detector efficiencies used in this experiment. The results are compared to the state-of-the-art three-body calculations and agreements are observed within rather large statistical uncertainties of the measurement. This experiment represents the first measurement of the asymmetry using spin-dependent 3He photodisintegration.</p> <p>The unpolarized differential cross section and helicity-dependent differential cross-section difference results are also presented and compared to the same theoretical calculations followed by a discussion of the results. Total cross section is also extracted using two different methods and agrees well with the theoretical prediction.</p> <p>New developments including a Sol-Gel coated pyrex 3He cell since the experiment are then presented. The in-beam test results of the aforementioned target cell from May 2009 test run are included and the prospect of future three-body photodisintegration is discussed in the end.</p> / Dissertation

<p>Parton distribution functions (PDFs) provide important information about the flavor and spin structure of nucleon, which is one of the most fundamental building blocks of nature. Furthermore, they can also shed light on quantum chromodynamics (QCD) in the confinement region. Inclusive deep inelastic scattering (DIS) has been one of the most common tools in accessing PDFs through the measurement</p><p>of structure functions. Moreover, the cross section in semi-inclusive deep inelastic scattering (SIDIS), which is the product of PDFs and fragmentation functions (FF), which describe the parton hadronization process due to the color force, provides additional information about PDFs. With recent theoretical developments in the framework of the transverse momentum dependent parton distribution functions</p><p>(TMDs), the importance of SIDIS process have been widely recognized and accepted, since the inclusive DIS will not be able to attain the information of parton transverse momentum.</p><p>JLab experiment E06-010 is measuring the target single spin asymmetry (SSA) in SIDIS from the n (e, e&#8242;&#960;+,&#8722;)X reaction with a transversely polarized 3He (effective polarized neutron) target at JLab Hall A with a 5.89 GeV incident electron beam. The kinematic coverage is 0.13 < x < 0.41 and 1.31 < Q2 < 3.1 (GeV2). This experiment represents the first SSA measurement from the SIDIS n (e, e&#8242;&#960;±)X process. One of the main objectives of the experiment is to measure the Collins asymmetry,</p><p>which in turn constrains the "transversity", one of the PDFs whose direct physical interpretation is the probability of finding a transversely polarized parton inside a transversely polarized nucleon. The other main objective of the experiment is to measure the Sivers asymmetry which reveals important information about correlations between the parton transverse momentum and the nucleon spin. The Sivers asymmetry is closely linked to the parton's orbital angular momentum, which is one important piece in understanding the nucleon spin in terms of quark and gluon</p><p>degrees of freedom. </p><p>This dissertation will first give an introduction to QCD, SIDIS and current</p><p>theoretical and the experimental status of SSA. Next the experimental setup of E06-010 will be described, followed by the data analysis procedure to extract the Collins/Sivers asymmetries. In the end, the preliminary results from the data analysis will be shown and discussed.</p> / Dissertation

Thesis (Ph. D.)--University OF MICHIGAN.