Publications
Publication Information
Title | A Measurement of the Transverse Asymmetry in Forward-Angle Electron-Carbon Scattering Using the Qweak Apparatus |
Authors | Martin James McHugh III |
JLAB number | JLAB-PHY-17-2507 |
LANL number | (None) |
Other number | (None) |
Document Type(s) | (Thesis) |
Associated with EIC: | No |
Supported by Jefferson Lab LDRD Funding: | No |
Funding Source: | Nuclear Physics (NP) |
Thesis A PHD thesis Advisor(s) : Allena Opper (George Washington University) | |
Publication Abstract: | The Qweak experiment at Jefferson Lab aims to achieve a 4% measurement of the protons weak charge by measuring the parity-violating asymmetry in elastic electron-proton scattering at low momentum-transfer squared, Q^2 = 0.025 (GeV/c)^2 . The measurement utilized Jefferson Labs high-quality beam of 89% longitudinally polarized electrons at currents up to 180 uA. A measurement of this parity-violating asymmetry will result in a precise 0.3% measurement of sin^2 Theta_W . The Standard Model makes a firm prediction of this quantity, making the high-precision Qweak measurement sensitive to new physics at the TeV scale. The Qweak apparatus was also used to measure the transverse asymmetry of electron-carbon scattering. This quantity is an observable of the imaginary component of the two-photon exchange process. My contributions to these two projects included data taking, analysis work, quantifying background contributions, and GEANT4 simulations of the apparatus. As an additional part of my graduate training, I was part of the team that updated the CEBAF Injector MeV Mott Polarimeter. |
Experiment Numbers: | E08-016 |
Group: | Hall C |
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DOI: | |
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