Speaker
Ms
Xiaorong Zhou
(University of Science and Technology of China)
Description
Electromagnetic form factors of baryons provide fundamental information about their structure and dynamics. They constitute a rigorous test of non-perturbative QCD as well as of phenomenological models. However, results in the time-like region have large uncertainties. The production cross section and form factors of hyperons are hardly explored. Based on 500 pb^-1 of data collected with the BESIII detector between 2.0 GeV and 3.08 GeV, and data collected at the peak of the psi(3770) resonance and higher energies, we report measurements of the proton form factor in the time-like region applying the energy scan method and the initial state radiation technique. In this talk, the line-shape of the Born cross sections of hyperon pairs for Lambda and Lambda_c baryons are included, where a non-zero cross section near threshold is discerned. The relative phase angle between electromagnetic form factors G_E and G_M of Lambda is also reported.
Primary author
Ms
Xiaorong Zhou
(University of Science and Technology of China)
