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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Pion Photo- and Electro-production from the Nucleon

Caia, George Laurentiu 24 November 2004 (has links)
No description available.
2

Effective kaon-nucleon cross section from nuclear transparency measured in the mass number of the nucleus (electron, scattered electron, kaons) reaction

Nuruzzaman, Nofirstname 07 August 2010 (has links)
Hadron propagation in the nuclear medium is essential for building an accurate model of the nuclear many-body system. Quasiree electron scattering from nuclei is one of the tools used in the study of hadron propagation effects in the nuclear medium. Electroproduction and propagation of class=SpellE>kaons from nuclei provides an additional (strangeness) degree of freedom, inaccessible with other hadrons. An experiment to measure the transparency of pions was completed in Dec 2004 at the Thomas Jefferson National Accelerator Facility in Hall C. Using same data set, we report the first measurement of the nuclear transparency of class=SpellE>kaons for 12C, 63Cu and 197Au nuclei at Q2= 1.1, 2.0 and 3.0 (GeV/c)2. We have also extracted the average effective kaon-nucleus cross section from the nuclear transparency. The Q2 and A dependence of the transparency and average effective cross section are compared to results from kaon-nucleus scattering data and found consistent within experimental uncertainties.
3

MEASUREMENT OF SINGLE-TARGET SPIN ASYMMETRIES IN THE ELECTROPRODUCTION OF NEGATIVE PIONS IN THE SEMI-INCLUSIVE DEEP INELASTIC REACTION n↑(e,éπ¯)X ON A TRANSVERSELY POLARIZED 3He TARGET

Dutta, Chiranjib 01 January 2010 (has links)
The experiment E06010 measured the target single spin asymmetry (SSA) in the semiinclusive deep inelastic (SIDIS) n↑(e,éπ¯)X reaction with a transversely polarized 3He target as an effective neutron target. This is the very first independent measurement of the neutron SSA, following the measurements at HERMES and COMPASS on the proton and the deuteron. The experiment acquired data in Hall A at Jefferson Laboratory with a continuous electron beam of energy 5.9 GeV, probing the valence quark region, with x = 0.13→0.41, at Q2 = 1.31→3.1 GeV2. The two contributing mechanisms to the measured asymmetry, viz, the Collins effect and the Sivers effect can be realized through the variation of the asymmetry as a function of the Collins and Sivers angles. The neutron Collins and Sivers moments, associated with the azimuthal angular modulations, are extracted from the measured asymmetry for the very first time and are presented in this thesis. The kinematics of this experiment is comparable to the HERMES proton measurement. However, the COMPASS measurements on deuteron and proton are in the low-x region. The results of this experiment are crucial as the first step toward the extraction of quark transversity and Sivers distribution functions in SIDIS. With the existing results on proton and deuteron, these new results on neutron will provide powerful constraints on the transversity and Sivers distributions of both the u and d-quarks in the valence region.

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