Speaker
Description
$\Lambda$ hypernuclear spectroscopy is useful for investigating the $\Lambda$-nucleon ($\Lambda$N) interaction. High resolution missing-mass spectroscopy for $\Lambda$ hypernuclei was established at Jefferson Lab by means of the $(e,e^{\prime}K^{+})$ reaction. We are preparing a next-generation experiment in which $\Lambda$ hypernuclei with a wide mass range, A = 6-208, will be measured at JLab's Experimental Hall C. The beam time is planned to start in 2027. High-momentum resolution spectrometers HES and HKS are expected to allow us to achieve an energy resolution of 0.6 MeV (FWHM) and a total energy accuracy of 0.07 MeV. Such a high accuracy measurement would give us new insights for $\Lambda$N charge symmetry breaking and isospin dependent $\Lambda$NN three body interaction. In addition, we aim to study deformation and cluster structures of core nuclei by using the $\Lambda$ in hypernuclei as a probe. For example, tri-axially deformation states in $^{26}$Mg will be investigated through high resolution spectroscopy of $^{27}_{\Lambda}$Mg.
I will review the hypernuclear physics program at Jefferson Lab.
