Parity-Violating Electron Scattering: New Results and Future Prospects
- Department of Physics, University of Massachusetts, Amherst, MA 01003 (United States)
We discuss the status and prospects of an experimental program of parity-violating asymmetry measurements in the scattering of longitudinally polarized electrons off unpolarized fixed targets. One thrust is the measurements of nucleon neutral weak form factors at intermediate four-momentum transfer (0.1 < Q2 < 1) (GeV/c)2 which provide information about the role of virtual strange quarks on the charge and current distributions inside nucleons. A new topic is the elastic neutral weak amplitude from scattering off a heavy spinless nucleus, which is sensitive to the presence of a neutron skin. Finally, we discuss the neutral current elastic amplitude at very low Q2, which allows precision measurements of the weak mixing angle at low energy and is thus sensitive to new physics at the TeV scale. The physics implications of recent results, potential measurements from experiments under construction as well as new ideas at future facilities are discussed.
- OSTI ID:
- 20894980
- Journal Information:
- AIP Conference Proceedings, Vol. 870, Issue 1; Conference: CIPAN2006: 9. conference on intersections of particle and nuclear physics, Rio Grande (Puerto Rico), 30 May - 3 Jun 2006; Other Information: DOI: 10.1063/1.2402591; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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