Determination of the πNN form factor from the threshold pion production of pp scattering

1995/02/02 by T. -S. H. Lee, Lee, T. -S. H.
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.nucl-th/9502005

openalex publication_date 1995/02/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

It is shown that the threshold productions of π⁰ pp, π⁺ np and π⁺ d from pp collisions can be consistently described by a model consisting of a pion s-wave rescattering and N N pair-terms of heavy-meson exchanges. The large difference between σ^tot (pp→π⁺ d) and σ^tot (pp→π⁺ np) is understood from the orthogonality of the deuteron and the np scattering wave functions. In a calculation using the Paris potential to account for the initial and final NN interactions, it is found that the data can be best reproduced by using a soft πNN form factor with Λ_π =650 MeV for a monopole form. This is consistent with an earlier study of pion production in the Δ excitation region.

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