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dc.contributor.supervisor Gericke, Michael (Physics & Astronomy) en_US
dc.contributor.author Wang, Peiqing
dc.date.accessioned 2011-09-02T17:35:39Z
dc.date.available 2011-09-02T17:35:39Z
dc.date.issued 2011-09-02
dc.identifier.uri http://hdl.handle.net/1993/4835
dc.description.abstract The Q-weak experiment at Thomas Jefferson National Accelerator Facility (USA) will make a precision determination of the proton weak charge with approximately 4% combined statistical and systematic uncertainties via a measurement of the parity violating asymmetry in elastic electron-proton scattering at very low momentum transfer and forward angle. This will allow an extraction of the weak mixing angle at Q^2=0.026 (GeV/c)^2 to approximately 0.3%. The weak mixing angle is a fundamental parameter in the Standard Model of electroweak interactions. At the proposed accuracy, a measured deviation of this parameter from the predicted value would indicate new physics beyond what is currently described in the Standard Model. Without deviation from the predicted value, this measurement would place stringent limits on possible extensions to the Standard Model and constitute the most precise measurement of the proton's weak charge to date. The key experimental apparatus include a liquid hydrogen target, a toroidal magnetic spectrometer and a set of eight Cerenkov detectors. The Cerenkov detectors form the main detector system for the Q-weak experiment and are used to measure the parity violating asymmetry during the primary Q-weak production runs. The Cerenkov detectors form the main subject of this thesis. Following a brief introduction to the experiment, the design, development, construction, installation, and testing of this detector system will be discussed in detail. This is followed by a detailed discussion of detector diagnostic data analysis and the corresponding detector performance. The experiment has been successfully constructed and commissioned, and is currently taking data. The thesis will conclude with a discussion of the preliminary analysis of a small portion of the liquid hydrogen data. en_US
dc.subject Standard Model en_US
dc.subject weak Interaction en_US
dc.subject weak mixing angle en_US
dc.subject weak charge en_US
dc.subject electron-proton scattering en_US
dc.subject parity violation en_US
dc.subject Cerenkov detector en_US
dc.subject Q-weak en_US
dc.subject momentum transfer en_US
dc.subject cross-section asymmetry en_US
dc.subject hadronic structure en_US
dc.subject form factor en_US
dc.title A Measurement of the Proton's Weak Charge Using an Integration Cerenkov Detector System en_US
dc.degree.discipline Physics and Astronomy en_US
dc.contributor.examiningcommittee Gwinner, Gerald (Physics & Astronomy), Martin, Jeffrey (Physics & Astronomy), Goltz, Douglas (Chemistry), Huber, Garth (Physics, U. of Regina) en_US
dc.degree.level Doctor of Philosophy (Ph.D.) en_US
dc.description.note October 2011 en_US


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