Lambda Hypertriton Spectroscopy by Electron Scattering at JLab*

The simplest bound system with a $\Lambda$ hyperon is a hypertrion which is an isospin singlet state of three body system. The strong interaction between a $\Lambda$ and a nucleon ($\Lambda N$ interaction) has been mainly investigated by using energies of $\Lambda$ hypernuclei. The $\Lambda$ binding energy $B_{\Lambda}$ of the simplest hypernuclei could give us a strong constraint for the study of $\Lambda N$ interaction. We are planning to measure the $\Lambda$ binding energy with an accuracy of $|\Delta B_{\Lambda}^{\rm total}|<100~{\rm keV}$ which would be the best accuracy among counter experiments. In the presentation, I will introduce an overview of the experiment (JLab C12-19-002). An expected result and impact for the baryon interaction study will also be discussed.