Affiliation:
1. University of California Los Angeles, Los Angeles, California, 90095-1547, USA
Abstract
Pion charge-exchange (π-p→π0n) differential cross sections are one of the basic sources of information on neutral pion-nucleon resonances. We present new, high statistics, high quality charge-exchange differential cross-section data obtained in the incident π- momentum range 650–750 MeV/c. The total uncertainty of the measurements is 6% or less. 648 new data points were obtained using the Crystal Ball multiphoton spectrometer covering 94% of the full solid angle. Our data show deviations from the results of the partial–wave analysis for some momenta, in particular at very backward angles. We also report on a search for the cusp effect in π-p→π0n at the opening of the π-p→ηn channel.
Publisher
World Scientific Pub Co Pte Lt
Subject
Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics