Abstract
Jefferson Laboratory has the potential to make a dramatically improved measurement of parity violation in Moeller scattering (e + e → e + e). In the context of the Standard Model, the measurement would yield the best determination of sin2 θ W at low energy (δsin2 θ W = ±0.00025), and one of the best at any energy scale. As a new physics search via the running of the weak mixing angle, the experiment would have unparalleled sensitivity to new parity-violating e ? e interactions, probing electron substructure to 29 TeV (95% CL). In terms of specific models, pulls of 6σ are allowed in R-parity violating SUSY, about 5σ in E6 Z′, and almost 3σ in R-parity conserving SUSY. The latter makes an improved Moeller measurement complementary to searches for SUSY loop-induced Electric Dipole Moments. Interpretability limits are well below the projected experimental error. A conceptual design for a 12 GeV JLab experiment is presented.
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Mack, D.J. (2007). Outlook for an improved measurement of parity violation in Moeller scattering at Jefferson Laboratory. In: de Jager, K., et al. Proceedings of The 3rd Workshop From Parity Violation to Hadronic Structure and more.... Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74413-9_36
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DOI: https://doi.org/10.1007/978-3-540-74413-9_36
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