Parity-Violating Electron Scattering: New Results and Future Prospects
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE - Office of Energy Research (ER)
- DOE Contract Number:
- FG02-88R40415-A018; AC05-84ER40150
- OSTI ID:
- 896491
- Report Number(s):
- JLAB-THY-06-594; DOE/ER/40150-4164; TRN: US0700778
- Resource Relation:
- Conference: CIPANP 2006: 9th Conference on the Intersections of Particle and Nuclear Physics, Westin Rio Mar Beach, Puerto Rico, 30 May - 3 Jun 2006
- Country of Publication:
- United States
- Language:
- English
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