Phys.Rev. C 103, L041301 (2021)

T.Gogami, for the HKS and JLab E05-115 Collaboration

Spectroscopy of A=9 hyperlithium with the (e, e'K⁺) reaction

NUCLEAR REACTIONS ⁹Be(e, e'K⁺)⁹Li, E=2.344 GeV; measured scattered electron and K⁺ using the HES and HKS magnetic spectrometers, respectively at the Jefferson Laboratory. ⁹Li; deduced missing mass spectrum, differential cross sections, binding energy of Λ hypernucleus, levels, J, π, excitation energies of the first and second excited states of A=9 hyperlithium, ratio of cross sections of the first excited state to the ground state of the hypernucleus. Interpretation of g.s. and the two excited states in ⁹Li hypernucleus as s_Λ states coupled with Jπ=2+, 1+ and 3+ states of ⁸Li nucleus. Comparison with theoretical calculations, and with results of previous experiments at JLab.

doi: 10.1103/PhysRevC.103.L041301