a Measurement of the Parity-Violating Gamma-Ray Asymmetry in the Neutron-Proton Capture

Details a Measurement of the Parity-Violating Gamma-Ray Asymmetry in the Neutron-Proton Capture a Measurement of the Parity-Violating Gamma-Ray Asymmetry in the Neutron-Proton Capture

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cgrs.conf..604p&link_type=abstract

CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS. Proceedings of the Eleventh International Symposium. Held 2-6 September 2002

Computer Science

Scientific paper

The ěc{n} + p -> d + γ experiment under construction at LANSCE studies the weak interaction between neutrons and protons. The experiment will measure the directional dependence of the parity-violating γ-ray asymmetry, Aγ, in the polarized cold neutron capture by para-hydrogen. The goal is to measure Aγ with uncertainty of 0.5 × 10-8, 10% of its predicted value. Aγ primarily isolates the ΔI = 1 component of the hadronic weak interaction, and thus will determine the long-range weak pion-nucleon coupling constant H1π . 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.

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