Spin-orbit splitting of 13ΛC

Publisher Summary Since ΛN scattering data are extremely limited due to experimental difficulties, the reaction data have clarified the gross structure of the A-nucleus interaction. The strange quark contributes little to the nuclear force. The small Λ-nucleus spin-orbit interaction has been one of the most interesting subjects in the hypernuclear physics for more than 20 years. The re-analysis of the emulsion experimental data collected by the European K- collaboration also indicates a relatively large splitting. There are also discrepancies among theoretical predictions on the spin-orbit splitting. This chapter performs an experiment with an electromagnetic probe and has great advantages over previous experiments. The (K-, π-) reaction on an enriched 13C target was used at the Brookhaven Alternate Gradient Synchrotron. This experiment with high resolution and high statistics is necessary to conclude the discrepancies.