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首页> 外文期刊>Proceedings of the Japan Academy, Series B. Physical and Biological Sciences >Strong binding and shrinkage of single and double span style="text-decoration: overline;"K/span nuclear systems (K−pp, K−ppn, K−K−p and K−K−pp) predicted by Faddeev-Yakubovsky calculations
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Strong binding and shrinkage of single and double span style="text-decoration: overline;"K/span nuclear systems (K−pp, K−ppn, K−K−p and K−K−pp) predicted by Faddeev-Yakubovsky calculations

机译：单和双 style =“ text-decoration：overline;”> K 核系统（K-pp，K-ppn，K-Kp和K-K-pp）的强结合和收缩由Faddeev-Yakubovsky计算

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Non-relativistic Faddeev and Faddeev-Yakubovsky calculations were made for K−pp, K−ppn, K−K−p and K−K−pp kaonic nuclear clusters, where the quasi bound states were treated as bound states by employing real separable potential models for the K−-K− and the K−-nucleon interactions as well as for the nucleon-nucleon interaction. The binding energies and spatial shrinkages of these states, obtained for various values of the style="text-decoration: overline;">K interaction, were found to increase rapidly with the style="text-decoration: overline;">K interaction strength. Their behaviors are shown in a reference diagram, where possible changes by varying the style="text-decoration: overline;">K interaction in the dense nuclear medium are given. Using the Λ(1405) ansatz with a PDG mass of 1405 MeV/c2 for K−p, the following ground-state binding energies together with the wave functions were obtained: 51.5 MeV (K−pp), 69 MeV (K−ppn), 30.4 MeV (K−K−p) and 93 MeV (K−K−pp), which are in good agreement with previous results of variational calculation based on the Akaishi-Yamazaki coupled-channel potential. The K−K−pp state has a significantly increased density where the two nucleons are located very close to each other, in spite of the inner NN repulsion. Relativistic corrections on the calculated non-relativistic results indicate substantial lowering of the bound-state masses, especially of K−K−pp, toward the kaon condensation regime. The fact that the recently observed binding energy of K−pp is much larger (by a factor of 2) than the originally predicted one may infer an enhancement of the style="text-decoration: overline;">K interaction in dense nuclei by about 25% possibly due to chiral symmetry restoration. In this respect some qualitative accounts are given based on “clearing QCD vacuum” model of Brown, Kubodera and Rho.

(Contributed by Toshimitsu YAMAZAKI, M.J.A.)
机译：对 K - pp ， K -进行非相对论的Faddeev和Faddeev-Yakubovsky计算/ sup> ppn ， K - K - p 和 K - K - pp 钾离子核簇，其中准核簇通过对 K -- K -和的实数可分离势模型将绑定状态视为绑定状态 K --核子相互作用以及核子-核子相互作用。人们发现，随着 style =“ text-decoration：overline;”> K 相互作用的各种值而获得的这些状态的结合能和空间收缩迅速增加。 style =“ text-decoration：overline;”> K 交互强度。它们的行为显示在参考图中，其中给出了通过改变在密集核介质中的 style =“ text-decoration：overline;”> K 相互作用可能发生的变化。将PDG质量为1405 MeV / c 2 的Λ（1405）ansatz用于 K - p ，获得了以下基态结合能和波函数：51.5 MeV（ K - pp ） ，69 MeV（ K - ppn ），30.4 MeV（ K - < i> K - p ）和93 MeV（ K - K - pp ），这与先前基于Akaishi-Yamazaki耦合通道电势的变分计算结果十分吻合。 K - K - pp 状态的密度显着增加，其中两个尽管有内部 NN 排斥，但核子彼此非常靠近。对计算出的非相对论结果的相对论校正表明，结合态质量特别是 K - K - / sup> pp ，朝向kaon凝聚态。最近观察到的 K - pp 的结合能比原先预测的要大得多（约2倍）的事实。致密核中 style =“ text-decoration：overline;”> K 相互作用的增强约25％，这可能是由于手性对称性恢复所致。在这方面，基于布朗，久保田和Rho的“清除QCD真空”模型给出了一些定性解释。

（由M.J.A. Toyamamitaki贡献）

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