Differential cross sections of the charge-exchange reaction pi- p --> pi0 n in the momentum range from 103 to 178 MeV/c

TL;DR

This paper reports precise measurements of differential cross sections for the pion-nucleon charge exchange reaction across a range of pion momenta, providing detailed angular distributions with low uncertainties.

Contribution

It presents new experimental data on differential cross sections for pi- p --> pi0 n at multiple momenta using the Crystal Ball detector, enhancing existing knowledge.

Findings

Differential cross sections measured at seven pion momenta.

Angular distributions obtained with high statistical precision.

Systematic uncertainties estimated at about 3%.

Abstract

Measured values of the differential cross sections for pion-nucleon charge exchange, pi- p --> pi0 n, are presented for pi- momenta of 103, 112, 120, 130, 139, 152, and 178 MeV/c. Complete angular distributions were obtained by using the Crystal Ball detector at the Alternating Gradient Synchrotron at Brookhaven National Laboratory. Statistical uncertainties of the differential cross sections vary from 3% to 6% in the backward angle region, and from 6% to about 20% in the forward region with the exception of the two most forward angles. The systematic uncertainties are estimated to be about 3% for all momenta.