Measuring the weak charge of the proton at Jefferson Lab: A search for physics beyond the standard model |
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Authors: | A K Opper |
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Institution: | Department of Physics, The George Washington University, Washington, DC, USA
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Abstract: | The JLab Q weak Collaboration is designing and constructing an experiment to measure the proton’s weak charge, Q W p , by measuring the parity violating asymmetry in elastic electron-proton scattering at very low momentum transfer. The standard model predicts Q W p = 1 ? 4 sin2 θ w from the running of the weak mixing angle sin2 θ w , corresponding to a 10σ effect in the experiment. The experiment will determine Q W p with 4% combined statistical and systematic uncertainties, which leads to 0.3% uncertainty in sin2 θ w . Installation of the experiment will begin in September 2009. |
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