Neutron-proton analyzing power at 12 MeV and inconsistencies in parametrizations of nucleon-nucleon data

Abstract

We present the most accurate and complete data set for the analyzing power Ay(theta) in neutron-proton scattering. The experimental data were corrected for the effects of multiple scattering, both in the center detector and in the neutron detectors. The final data at En = 12.0 MeV deviate considerably from the predictions of nucleon-nucleon phase-shift analyses and potential models. The impact of the new data on the value of the charged pion-nucleon coupling constant is discussed in a model study.

arXiv commentSix pages, four figures, one table, to be published in Physics Letters B

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Cited by in corpus (5)

• Signatures of three-nucleon interactions in few-nucleon systems
• Coarse grained Potential analysis of neutron-proton and proton-proton scattering below pion production threshold
• Partial Wave Analysis of Nucleon-Nucleon Scattering below pion production threshold
• Precise Determination of Charge Dependent Pion-Nucleon-Nucleon Coupling Constants
• Is there an Ay problem in low-energy neutron-proton scattering?