On the binding energy and the charge symmetry breaking in A ≤ 16 Λ-hypernuclei

In recent years, several experiments using magnetic spectrometers provided high precision results in the field of Hypernuclear Physics. In particular, the accurate determination of the -binding energy, B , contributed to stimulate considerably the discussion about the Charge Symmetry Breaking effect in -hypernuclei isomultiplets. We have reorganized the results from the FINUDA experiment and we have obtained a series of B values for -hypernuclei with A ≤ 16 by taking into account data only from magnetic spectrometers implementing an absolute calibration of the energy scale (FINUDA at DA NE and electroproduction ex- periments at JLab and at MaMi). We have then critically revisited the results obtained at KEK by the SKS Collaboration in order to make possible a direct comparison between data from experiments with and with- out such an absolute energy scale. A synopsis of recent spectrometric measurements of B is presented, including also emulsion experiment results. Several interesting conclusions are drawn, among which the equality within the errors of B for the A = 7, 12, 16 isomultiplets, based only on recent spectrometric data. This observation is in nice agreement with a recent theoretical prediction. Ideas for possible new measurements which should improve the present experimental knowledge are finally put forward.