Recalibration of the binding energy of hypernuclei measured in emulsion experiments and its implications

Charge symmetry breaking in $Λ$ hypernuclei revisited

The large charge symmetry breaking (CSB) implied by the $Λ$ binding energy difference $ΔB^{4}_Λ(0^+_{\rm g.s.})\equiv B_Λ(_Λ^4$He)$-$$B_Λ(_Λ^4$H) = 0.35$\pm$0.06 MeV of the $A=4$ mirror hypernuclei ground states, determined from emulsion studies, has defied theoretical attempts to reproduce it in terms of CSB in hyperon masses and in hyperon-nucleon interactions, including one pion exchange arising from $Λ-Σ^0$ mixing. Using a schematic strong-interaction $ΛN\leftrightarrowΣN$ coupling model developed by Akaishi and collaborators for $s$-shell $Λ$ hypernuclei, we revisit the evaluation of CSB …

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

$^{3}_Λ\rm{H}$ 和 $^{4}_Λ\rm{H}$ 的结合能：基于深度学习的核乳胶图像分析

Binding energy of $^{3}_Λ\rm{H}$ and $^{4}_Λ\rm{H}$ via image analyses of nuclear emulsions using deep-learning

本研究利用深度学习分析核乳胶图像，精确测量超氚核和$^4_Λ\mathrm{H}$的结合能，揭示传统分析的系统误差，提供独立于重离子碰撞实验的互补测量结果。

Observation of Coulomb-assisted nuclear bound state of $Ξ^-$-$^{14}$N system

In an emulsion-counter hybrid experiment performed at J-PARC, a $Ξ^-$ absorption event was observed which decayed into twin single-$Λ$ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as $Ξ^{-} + ^{14}$N$\ \rightarrow\ ^{10}_Λ$Be + $^5_Λ$He. For the binding energy of the $Ξ^{-}$ hyperon in the $Ξ^-$-$^{14}$N system a value of $1.27 \pm 0.21$ MeV was deduced. The energy level of $Ξ^-$ is likely a nuclear $1p$ state which indicates a weak $ΞN$-$ΛΛ$ coupling.