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Updated: Jul 29, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Strange-quark contributions to parity-violating asymmetries in the forward g0 electron-proton scattering experiment
D S Armstrong1, J Arvieux, R Asaturyan
1Department of Physics, College of William and Mary, Williamsburg, VA 23187, USA.
Abstract:
We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 < or =1.0 GeV2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange-quark contributions to the currents of the proton. The measurements were made at Jefferson Laboratory using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate nonzero, Q2 dependent, strange-quark contributions and provide new information beyond that obtained in previous experiments.
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