Four-Body Structure of Λ Hypernuclei and 4He Tetramer System

Abstract

Gaussian Expansion Method has been applied to four-body calculations of \({^4_{\Lambda}{\rm H}}\) and \({^4_{\Lambda}{\rm He}}\), and four-body calculation of 4He tetramer. We found that Λ N− Σ N coupling is important to make bound A = 4 hypernuclei. The binding energies of the tetramer ground state and excited states are obtained as 558.98 and 127.33 mK.