Measurement of the Absolute Differential Cross Section for np Elastic Scattering at 194 MeV

Abstract

A tagged medium-energy neutron beam has been used in a precise measurement of the absolute differential cross section for np back-scattering. The results resolve significant discrepancies within the np database concerning the angular dependence in this regime. The experiment has determined the absolute normalization with 1.5% uncertainty, suitable to verify constraints of supposedly comparable precision that arise from the rest of the database in partial wave analyses. The analysis procedures, especially those associated with evaluation of systematic errors in the experiment, are described in detail so that systematic uncertainties may be included in a reasonable way in subsequent partial wave analysis fits incorporating the present results.

arXiv comment22 pages, 21 figures, submitted for publication in Physical Review C

References in corpus (12)

• Accurate Charge-Dependent Nucleon-Nucleon Potential at Fourth Order of Chiral Perturbation Theory
• Quantum Monte Carlo Calculations of Light Nuclei
• Ab initio shell model with a genuine three-nucleon force for the p-shell nuclei
• The nucleon-nucleon interaction
• Nucleon-nucleon elastic scattering to 3 GeV
• Observation of the Charge Symmetry Breaking d + d -> 4He + pi0 Reaction Near Threshold
• Extraction of the $\pi NN$ coupling constant from NN scattering data
• pi-NN Coupling Constants from NN Elastic Data between 210 and 800 Mev
• The PSI np data and their effect on the charge Pi-N-N coupling constant
• Comment on piNN Coupling from High Precision np Charge Exchange at 162 MeV
• Measurement of the Absolute np Scattering Differential Cross Section at 194 MeV
• Normalization of neutron-proton differential cross sections

Cited by in corpus (4)

• Updated analysis of NN elastic scattering to 3 GeV
• Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
• Coarse grained Potential analysis of neutron-proton and proton-proton scattering below pion production threshold
• Precise Determination of Charge Dependent Pion-Nucleon-Nucleon Coupling Constants