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On the binding energy and the charge symmetry breaking in A <=3D 16 Lambda-hypernuclei

Author:
Botta, E.  Bressani, T.  Feliciello, A.  


Journal:
NUCLEAR PHYSICS A


Issue Date:
2017


Abstract(summary):

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 Lambda-binding energy, B-Lambda, contributed to stimulate considerably the discussion about the Charge Symmetry Breaking effect in Lambda-hypernuclei isomultiplets. We have reorganized the results from the FINUDA experiment and we have obtained a series of B-Lambda values for Lambda-hypernuclei with A <=3D 16 by taking into account data only from magnetic spectrometers implementing an absolute calibration of the energy scale (FINUDA at DA Phi NE and electroproduction experiments 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 without such an absolute energy scale. A synopsis of recent spectrometric measurements of B-Lambda is presented, including also emulsion experiment results. Several interesting conclusions are drawn, among which the equality within the errors of B-Lambda for the A =3D 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. (C) 2017 Elsevier B.V. All rights reserved.


Page:
165---179


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