Realistic calculations of (K)over-barNN, (K)over-barNNN, and (K)over-bar(K)over-barNN quasibound states

被引：107

作者：

Barnea, N. ^{[1
]}

Gal, A. ^{[1
]}

Liverts, E. Z. ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

来源：

PHYSICS LETTERS B | 2012年 / 712卷 / 1-2期

基金：

以色列科学基金会;

关键词：

Few-body systems; Mesic nuclei; Forces in hadronic systems and effective interactions; Kaon-baryon interactions; NUCLEON SCATTERING; KAONIC HYDROGEN; AMPLITUDES; CONSTRAINTS; DYNAMICS;

D O I：

10.1016/j.physletb.2012.04.055

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Binding energies and widths of three-body (K) over bar NN, and of four-body (K) over bar NNN and (K) over bar(K) over bar NN nuclear quasibound states are calculated in the hyperspherical basis, using realistic NN potentials and subthreshold energy dependent chiral (K) over barN interactions. Results of previous (K) over bar (-) pp calculations are reproduced and an upper bound is placed on the binding energy of a (K) over bar (-) d quasibound state. A self-consistent handling of energy dependence is found to restrain binding, keeping the calculated four-body ground-state binding energies to relatively low values of about 30 MeV. The lightest strangeness -2 particle-stable (K) over bar nuclear cluster is most probably (K) over bar(K) over bar NN. The calculated (K) over barN -> pi Y conversion widths range from approximately 30 MeV for the (K) over bar NNN ground state to approximately 80 MeV for the (K) over bar(K) over bar NN ground state. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：132 / 137

页数：6

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