On the Binding Energy and the Charge Symmetry Breaking in A<=16 Lambda-hypernuclei

Abstract

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 <= 16 by taking into account data only from magnetic spectrometers implementing an absolute calibration of the energy scale (FINUDA at DAFNE 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 = 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.

22 pages, 5 figures

References in corpus (11)

• Big-Bang Nucleosynthesis
• Strangeness in nuclear physics
• Strangeness nuclear physics: a critical review on selected topics
• Charge symmetry breaking in $\Lambda$ hypernuclei revisited
• The experiments with the High Resolution Kaon Spectrometer at JLab Hall C and the new spectroscopy of ${}_{\Lambda }^{12}\text{B}$ hypernuclei
• New results on Mesonic Weak Decay of $p$-shell $\Lambda$-Hypernuclei
• First observation of the hyper superheavy hydrogen 6ΛH
• Charge symmetry breaking in the A=4 hypernuclei
• Spectroscopy of the neutron-rich hypernucleus ${}_{\Lambda }^7$He from electron scattering
• Spectroscopy of Lambda-9Li by electroproduction
• pi^- decay rates of p-shell hypernuclei revisited

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• Implications of an increased $\Lambda$-separation energy of the hypertriton
• Hadron Physics at J-PARC
• Hyperon halo structure of C and B isotopes
• Exploring the $\Lambda$-deuteron interaction via correlations in heavy-ion collisions
• Constraints on the $\Lambda$-neutron interaction from charge symmetry breaking in the ${}_{\mathbf{\Lambda }}^4\mathbf{He}$--${}_{\mathbf{\Lambda }}^4\mathbf{H}$ hypernuclei
• $\Lambda$ hypernuclear potentials beyond linear density dependence
• Structure of single-$\Lambda$ hypernuclei with chiral hyperon-nucleon potentials
• Ab initio calculation of charge symmetry breaking in $A=7$ and $8$ $\Lambda$-hypernuclei
• Spectroscopy of $A=9$ hyperlithium by the $(e,e^{\prime }{K}^{+})$ reaction
• Recalibration of the binding energy of hypernuclei measured in emulsion experiments and its implications
• Experimental techniques and performance of $\Lambda$-hypernuclear spectroscopy with the $(e,e^{\prime }{K}^{+})$ reaction
• Charge symmetry breaking in hypernuclei within RMF model
• Charge symmetry breaking in light $\Lambda$ hypernuclei
• Nonmesonic Weak Decay of $\Lambda$ Hypernuclei: The Three--Nucleon Induced Mode
• Old and New in Strangeness Nuclear Physics
• Charge symmetry breaking effects of $\omega$-${\rho }^0$ mixing in relativistic mean-field model