Low-Energy Pion-Nucleon Interaction and the Sigma-Term

Abstract

A dispersion framework, appropriate for discussing the low-energy pion-nucleon interaction, is reviewed. Sensitivity of the isoscalar D-amplitude at the unphysical Cheng-Dashen point to input from different phase shift analyses and low-energy experiments is discussed.

6 pages, no figures

References in corpus (3)

• Chiral expansion of baryon masses and $\sigma$-terms
• $\pi N\sigma$ Term , $\bar{s}s$ in Nucleon, and Scalar Form Factor --- a Lattice Study
• On the analysis of the pion--nucleon $\sigma$--term: The size of the remainder at the Cheng--Dashen point