Sensitivity of the COSY Dibaryon Candidate to np Elastic Scattering Measurements
R.L. Workman, W.J. Briscoe, I.I. Strakovsky (GWU)
TL;DR
This paper investigates the potential existence of a dibaryon resonance in neutron-proton scattering by analyzing polarization data from COSY experiments and assessing how future measurements could confirm or refute this resonance.
Contribution
It provides a comparative analysis of fits with and without a dibaryon pole, clarifying the resonance's impact on np scattering data and suggesting key measurements to distinguish between models.
Findings
COSY data influence the pole vs. non-pole fit comparison
Further np scattering measurements can clarify the resonance existence
Analysis supports potential dibaryon resonance in np scattering
Abstract
The case for a dibaryon resonance, appearing in np scattering, has support from a WASA-at-COSY measurement of the polarization quantity A_y over a center-of-mass energy region suggested by structures seen earlier in two-pion production experiments. Here we compare fits with and without an associated pole in order to clarify the impact of these COSY data. We then consider what further np scattering measurements would most clearly distinguish between the pole and non-pole fit results.
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