A 3% Measurement of the Beam Normal Single Spin Asymmetry in Forward Angle Elastic Electron-Proton Scattering using the Q<sub>weak</sub> Setup
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Ohio University / OhioLINK
2013
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1375705139 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou13757051392021-08-03T06:19:10Z A 3% Measurement of the Beam Normal Single Spin Asymmetry in Forward Angle Elastic Electron-Proton Scattering using the Q<sub>weak</sub> Setup Waidyawansa, D. Buddhini P. Physics Nuclear Physics Qweak experiment beam normal single spin asymmetry electron scattering two-photon exchange Standard Model of particle physics The beam normal single spin asymmetry generated in the scattering of transversely polarized electrons from unpolarized nucleons is an observable of the imaginary part of the two-photon exchange process. Moreover, it is a potential source of false asymmetry in parity violating electron scattering experiments. The Q<sub>weak</sub> experiment uses parity violating electron scattering to make a direct measurement of the weak charge of the proton. The targeted 4% measurement of the weak charge of the proton probes for parity violating new physics beyond the Standard Model. The beam normal single spin asymmetry at Q<sub>weak</sub> kinematics is at least three orders of magnitude larger than 5 ppb precision of the parity violating asymmetry. To better understand this parity conserving background, the Q<sub>weak</sub> Collaboration has performed elastic scattering measurements with fully transversely polarized electron beam on the proton and aluminum. This dissertation presents the analysis of the 3% measurement (1.3% statistical and 2.6% systematic) of beam normal single spin asymmetry in electron-proton scattering at a Q<sup>2</sup> of 0.025 (GeV/c)<sup>2</sup>. It is the most precise existing measurement of beam normal single spin asymmetry available at the time. A measurement of this precision helps to improve the theoretical models on beam normal single spin asymmetry and thereby our understanding of the doubly virtual Compton scattering process. 2013-09-26 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1375705139 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1375705139 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Physics Nuclear Physics Qweak experiment beam normal single spin asymmetry electron scattering two-photon exchange Standard Model of particle physics |
| spellingShingle |
Physics Nuclear Physics Qweak experiment beam normal single spin asymmetry electron scattering two-photon exchange Standard Model of particle physics Waidyawansa, D. Buddhini P. A 3% Measurement of the Beam Normal Single Spin Asymmetry in Forward Angle Elastic Electron-Proton Scattering using the Q<sub>weak</sub> Setup |
| author |
Waidyawansa, D. Buddhini P. |
| author_facet |
Waidyawansa, D. Buddhini P. |
| author_sort |
Waidyawansa, D. Buddhini P. |
| title |
A 3% Measurement of the Beam Normal Single Spin Asymmetry in Forward Angle Elastic Electron-Proton Scattering using the Q<sub>weak</sub> Setup |
| title_short |
A 3% Measurement of the Beam Normal Single Spin Asymmetry in Forward Angle Elastic Electron-Proton Scattering using the Q<sub>weak</sub> Setup |
| title_full |
A 3% Measurement of the Beam Normal Single Spin Asymmetry in Forward Angle Elastic Electron-Proton Scattering using the Q<sub>weak</sub> Setup |
| title_fullStr |
A 3% Measurement of the Beam Normal Single Spin Asymmetry in Forward Angle Elastic Electron-Proton Scattering using the Q<sub>weak</sub> Setup |
| title_full_unstemmed |
A 3% Measurement of the Beam Normal Single Spin Asymmetry in Forward Angle Elastic Electron-Proton Scattering using the Q<sub>weak</sub> Setup |
| title_sort |
3% measurement of the beam normal single spin asymmetry in forward angle elastic electron-proton scattering using the q<sub>weak</sub> setup |
| publisher |
Ohio University / OhioLINK |
| publishDate |
2013 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1375705139 |
| work_keys_str_mv |
AT waidyawansadbuddhinip a3measurementofthebeamnormalsinglespinasymmetryinforwardangleelasticelectronprotonscatteringusingtheqsubweaksubsetup AT waidyawansadbuddhinip 3measurementofthebeamnormalsinglespinasymmetryinforwardangleelasticelectronprotonscatteringusingtheqsubweaksubsetup |
| _version_ |
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