New way to produce dense double-antikaonic dibaryon system, .YEN..YEN.bar{K}.YEN..YEN.bar{K}NN, through .LAMBDA.(1405)-doorway sticking in p + p collisions

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

2013

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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 interaction, were found to increase rapidly with the interaction strength. Their behaviors are shown in a reference diagram, where possible changes by varying the 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 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.

Section: Resultsmentioning

confidence: 99%

“…The repulsive force between the two anti-kaons is not effective to prevent this double attraction mechanism (see also refs. 19), 20)). Surprisingly, as shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Strong binding and shrinkage of single and double K nuclear systems (K−pp, K−ppn, K−K−p and K−K−pp) pred

Maeda

Proceedings of the Japan Academy. Ser. B: Physical and Biologic

2013

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“…This indicates that the ensemble of K − 's and p's tends to form an ensemble of Λ * 's. This situation helps diminish possible repulsive interactions among K − 's, as discussed in [8,10,11].…”

Section: Comprehensive Calculations Onmentioning

confidence: 84%

K⁻K⁻pp - an Important Gateway Toward Multi-Kaonic Nuclei

Maeda

Proceedings of the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)

2017

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“…2) can be investigated. Such a precursor can also be produced in the reactions (p + p → Λ * + Λ * + K + + K + ) at lab energies of around 7 GeV [28,29]. One can also study the (Λ * ) m multiplets with moderate multiplicity, m, in heavy-ion reactions, which are expected to exist as metastable fragments with various lifetimes.…”

Section: Discussionmentioning

confidence: 99%

High-density kaonic-proton matter ( KPM ) composed of Λ ⁎ ≡ K − p multiplets and its astrophysical connections

2017

Physics Letters B

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We propose and examine a new high-density composite of Λ * ≡ K − p = (sū) ⊗ (uud), which may be called Kaonic Proton Matter (KPM), or simply, Λ * -Matter, where substantial shrinkage of baryonic bound systems originating from the strong attraction of the (KN ) I=0 interaction takes place, providing a ground-state neutral baryonic system with a huge energy gap. The mass of an ensemble of (K − p)m, where m, the number of the K − p pair, is larger than m ≈ 10, is predicted to drop down below its corresponding neutron ensemble, (n)m, since the attractive interaction is further increased by the Heitler-London type molecular covalency, as well as by chiral symmetry restoration of the QCD vacuum. Since the seed clusters (K − p, K − pp and K − K − pp) are short-lived, the formation of such a stabilized relic ensemble, (K − p)m, may be conceived during the Big-Bang Quark Gluon Plasma (QGP) period in the early universe before the hadronization and quark-antiquark annihilation proceed. At the final stage of baryogenesis a substantial amount of primordial (ū,d)'s are transferred and captured into KPM, where the anti-quarks find places to survive forever. The expected KPM state may be cold, dense and neutralqq-hybrid (Quark Gluon Bound (QGB)) states, [s(ū ⊗ u)ud]m, to which the relic of the disappearing anti-quarks plays an essential role as hidden components. Explosive production of KPM from supernova precursors is considered as a possible observational astronomical process.PACS numbers: