Zeros of the helicity amplitudes of Σ+-p elastic scattering
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Optimally exploiting the analytic structure of the helicity amplitudes of Σ+-p scattering we locate their zeros by making a fit to the differential cross-section curves at 40, 100 and 150 MeV energies. Minute changes in the positions of the zeros produced detectable noises in the fit. It was observed that quite reliable predictions for the phase shifts can also be obtained from this analysis.
Volume 96, 2022
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