Parity Violation Deep Inelastic Scattering Experiments at JLab

29 Apr 2015, 10:45


WG3 Electroweak Physics and Beyond the Standard Model WG3:Electroweak Physics and Beyond the Standard Model


Vincent Sulkosky (MIT)


We report on a measurement of parity-violating (PV) asymmetries in the deep inelastic scattering (DIS) and nucleon resonance regions using inclusive scattering of longitudinally polarized electrons from unpolarized deuterons. The effective weak couplings $C_{2q}$ are accessible through these PV-DIS asymmetries. This measurement of the PV asymmetry yielded a determination of $2C_{2u} - C_{2d}$ with an improved precision of a factor of five relative to previous results. These results indicate evidence with 95% confidence that the $2C_{2u} - C_{2d}$ is non-zero. This experiment also provides the first parity-violation data covering the whole resonance region, which provide constraints on nucleon resonance models. The program to measure PV-DIS at JLab in the 12 GeV era will also be briefly discussed.

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