Total cross sections for the H(π+,π+π+)n reaction have been measured at pion kinetic energies of 180, 184, 190 and 200 MeV. The threshold value for the matrix element a(π+π+) and the s-wave, isospin-2, ππ scattering length a20 were determined. The results were found to be in agreement with chiral perturbation theory and inconsistent with the model of dominance by quark loop anomalies.
Measurement of the H (pi+, pi+ pi+) n cross-section very near threshold and chiral symmetry
CAMERINI, Paolo;RUI, RINALDO;
1991-01-01
Abstract
Total cross sections for the H(π+,π+π+)n reaction have been measured at pion kinetic energies of 180, 184, 190 and 200 MeV. The threshold value for the matrix element a(π+π+) and the s-wave, isospin-2, ππ scattering length a20 were determined. The results were found to be in agreement with chiral perturbation theory and inconsistent with the model of dominance by quark loop anomalies.File in questo prodotto:
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