Differential cross sections for pion charge exchange on the proton at 27.5 MeV

TL;DR

This paper reports precise measurements of pion charge exchange cross sections on protons at 27.5 MeV, confirming theoretical predictions and enhancing understanding of pion-nucleon interactions.

Contribution

First detailed differential cross section measurements at this energy, validating standard pion-nucleon partial wave analysis models.

Findings

Measured cross sections agree with theoretical predictions

Data covers angular range from 0° to 55°

Results support existing pion-nucleon interaction models

Abstract

We have measured pion single charge exchange differential cross sections on the proton at 27.5 MeV incident $\pi^-$ kinetic energy in the center of momentum angular range between $0^\circ$ and $55^\circ$. The extracted cross sections are compared with predictions of the standard pion-nucleon partial wave analysis and found to be in excellent agreement.