Is there an Ay problem in low-energy neutron-proton scattering?

Abstract

We calculate Ay in neutron-proton scattering for the interactions models WJC-1 and WJC-2 in the Covariant Spectator Theory. We find that the recent 12 MeV measurements performed at TUNL are in better agreement with our results than with the Nijmegen Phase Shift Analysis of 1993, and after reviewing the low-energy data, conclude that there is no Ay problem in low-energy np scattering.

5 pages, 2 figures, accepted by PLB

References in corpus (6)

• The high-precision, charge-dependent Bonn nucleon-nucleon potential (CD-Bonn)
• Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
• Relativistic calculation of the triton binding energy and its implications
• Covariant equations for the three-body bound state
• High-precision covariant one-boson-exchange potentials for np scattering below 350 MeV
• Neutron-proton analyzing power at 12 MeV and inconsistencies in parametrizations of nucleon-nucleon data

Cited by in corpus (4)

• Signatures of three-nucleon interactions in few-nucleon systems
• Precise Determination of Charge Dependent Pion-Nucleon-Nucleon Coupling Constants
• Electromagnetic Transition Form Factors of Baryon Resonances
• Relativistic descriptions of few-body systems