Using e+e-annihilation data taken at the CESR collider with the CLEO-c detector, measurements of hyperon pair production cross sections and elastic and transition electromagnetic form factors have been made at the charmonium resonances: ψ(2S), s=3.69 GeV, |Q2|=13.6 GeV2, L=48 pb-1; ψ(3770), s=3.77 GeV, |Q2|=14.2 GeV2, L=805 pb-1; and ψ(4170), s=4.17 GeV, |Q2|=17.4 GeV2, L=586 pb-1. Results with good statistical precision are obtained with high efficiency particle identification. Systematics of pair production cross sections, and form factors with respect to the number of strange quarks in the hyperons are studied, and evidence is presented for the effects of diquark correlations in comparative results for Λ0 and Σ0, both of which have the same uds quark content but different isospin.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)