A measurement of the parity-violating gamma-ray asymmetry in the neutron-proton capture
- Seppo I.
- J. David
- Roger D.
- Michael T.
- Gregory S.
- Ėduard Ivanovich
- Todd B.
- William M.
- Vincent W.
The {rvec n} + p {yields} d + {gamma} experiment under construction at LANSCE studies the weak interaction between neutrons and protons. The experiments will measure the directional dependence of the parity-violating {gamma}-ray asymmetry, A{sub {gamma}}, in the polarized cold neutron capture by para-hydrogen. The goal is to measure A{sub {gamma}} with uncertainty of 0.5 x 10{sup -8}, 10% of its predicted value. A{sub {gamma}} primarily isolates the {Delta}I = 1 component of the hadronic weak interaction and thus will determine the long-range weak pion-nucleon coupling constant H{sub {pi}}{sup 1}. The experiment is carefully designed for the LANSCE pulsed spallation neutron source to achieve the proposed statistical precision and to control systematic errors. We discuss the experiment and its status.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 976399
- Report Number(s):
- LA-UR-02-6560; TRN: US1006896
- Resource Relation:
- Conference: Submitted to: Proceedings of the 11th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics, Pruhonice, Prague, Czech Republic, September 2-6, 2002
- Country of Publication:
- United States
- Language:
- English
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