Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2005-06-17
Phys.Rev.Lett.95:092001,2005
Physics
Nuclear Physics
Nuclear Experiment
5 pages, 2 figures
Scientific paper
10.1103/PhysRevLett.95.092001
We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < Q^2 < 1.0 GeV^2. 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 JLab using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate non-zero, Q^2 dependent, strange quark contributions and provide new information beyond that obtained in previous experiments.
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