Charge Symmetry Breaking in Light Hypernuclei

Recently precise Λ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\varLambda }$$\end{document}-hyperon ground-state binding energies in light hypernuclei have been determined with novel techniques, in particular with a new generation of magnetic spectrometers. The precision spectroscopy results of Λ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\varLambda }$$\end{document} hypernuclei isomultiplets contributed considerably to the study of charge symmetry breaking in the strong interaction. At the Mainz Microtron MAMI the high-resolution spectroscopy of decay-pions in strangeness electro-production was used to extract the ground state binding energy in Λ4\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^4_{\varLambda }$$\end{document}H. This value was compared to the value of the isospin mirror hypernucleus Λ4\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^4_{\varLambda }$$\end{document}He to confirm a sizable breaking of the charge symmetry. A synopsis for the values in the A=7,8,9,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$A = 7, 8, 9,$$\end{document} and 10 hypernuclei suggests small or vanishing effects in other isomultiplets. The full understanding of the large and spin-dependent effect in the A=4\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$A = 4$$\end{document} mirror pair remains one of the open issues of hypernuclear physics.