The lowest momentum at which the total scattering cross-section data are available for Σ+p and Σ−p scattering is 145 MeV/c and 142.5 MeV/c respectively. Thus extracting low energy parameters amounts to extrapolating the data to still lower energies. Using the analytic structure of foward scattering amplitude to advantage a parameterization of theσT is presented which is hoped to be more reliable and stable for deriving results through extrapolation. The scattering lengths and effective ranges for the Σ+p and Σ−p are also estimated.
Volume 96, 2022
Continuous Article Publishing mode
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