Quark-Model Description of the Hyperon-Nucleon Interaction and its

超子-核子相互作用的夸克模型描述及其

• 批准号: 07640397
• 负责人: FUJIWARA Yoshikazu
• 金额: $ 1.34万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640397/
• 关键词: Quark model; YN interaction; Strangeness; RGM; ストレィンジネス; イペロン核子相互作用

The purpose of this project is to study the hyperon-nucleon interaction in the constituent quark model. We have improved the effective meson-exchange potentials of RGM-F, by incorporating the spin-spin and tensor terms of all the pseudo-scalar meson-nonet exchanges acting between quarks. The spin-flavor factors of the quark exchange kernel for these effective meson-exchange potentials are explicitly calculated. The new versions of our quark model, FSS and RGM-H, are then employed to study scattering observables of the hyperon-nucleon interaction in the wide energy range. The KEK experiment KEK-PS E251 has given a new data for the SIGMA^+p scattering cross sections at the intermediate energies, which is not inconsistent with our quark-model prediction. Further experimental data for the Ap and SIGMA^-p scattering are expected through the analysis of KEK-PS E289 experiment. We have developed the Lippmann-Schwinger formalism of the quark RGM (resonating-group method) to approach higher energies where the variational method for scattering employed so far does not yield cnough accuracy. By this improvement, we have calculated the differential cross sections and polarization of the pp and np elastic scattering up to the incident energy of 800 MeV.The gross behavior of the energy-dependence and the angular distribution is qualitatively reproduced. This technique is also applied to calculate the G-matrix for the nucleon-nucleon interaction, and the nuclear matter calculation was performed in FSS.The saturation point lies near the Coester line on the higher-density side. We have also examined the baryon-baryon interaction with the stangeness S=-2 by using RGM-F.The binding energy of the H-particle in RGM-F is 19 MeV, and the predicted XI^-p total cross sections at p_<XI>=500 Mev/c are sigma_<el> (XI^-p) =26mb, sigma (XI^-p*XI^0n) =23mb and sigma (XI^-p*LAMBDALAMBDA) =18mb.

本项目的目的是研究组分夸克模型中的超子-核子相互作用。通过引入夸克间赝标介子-九元交换的自旋-自旋和张量项，改进了RGM-F的有效介子交换势。这些有效的介子交换势的夸克交换核的自旋风味因子的明确计算。我们的新版本的夸克模型，FSS和RGM-H，然后被用来研究散射可观的超子-核子相互作用在较宽的能量范围。KEK实验KEK-PS E251给出了中能SIGMA^+p散射截面的新数据，这与我们的夸克模型预言并不矛盾。通过对KEK-PS E289实验的分析，希望能得到更多的Ap和SIGMA^-p散射的实验数据。我们发展了夸克RGM（共振群方法）的Lippmann-Schwinger形式，以接近更高能量的散射，其中到目前为止采用的变分方法不能产生足够的精度。利用这一改进，我们计算了入射能量为800 MeV的pp和np弹性散射的微分截面和极化，定性地再现了能量依赖性和角分布的总体行为。用该方法计算了核子-核子相互作用的G矩阵，并在FSS中进行了核物质计算，饱和点位于高密度侧的Coester线附近。我们还用RGM-F研究了奇异度S=-2的重子-重子相互作用，得到H粒子在RGM-F中的结合能为19 MeV，在p <XI>=500 Mev/c时的总截面为sigma_<el>（XI^-p）= 26 mb，sigma（XI^-p* XI ^0 n）= 23 mb，sigma（XI ^-p*LAMBDALAMBDA）= 18 mb.

项目成果

藤田 匡(T.Fujita): "Scattering Observables of N N Interaction in the SU_6 Quark Model" Progress of Theoretical Physics. 96巻・2号. 463-468 (1996)

T.Fujita：“SU_6 夸克模型中 N N 相互作用的散射可观测量”理论物理进展第 96 卷，第 2 期。463-468 (1996)

Y.Fujiwara: "RGM Study of the Hyperon-Nucleon Interaction in the SU_6 Quark Model.I-Analysis of NN and SIGMA^+pSystems-" Prog.Theor.Phys. 94-2. 215-232 (1995)

Y.Fujiwara：“SU_6 夸克模型中超子-核子相互作用的 RGM 研究。I-NN 和 SIGMA^ pSystems 的分析-”Prog.Theor.Phys。

仲本 朝基(C.Nakamoto): "Central Force of the Hyperon-Nucleon Interaction in the SU_6 Quark Model" Progress of Theoretical Physics. 94-1. 65-90 (1995)

C.Nakamoto：“SU_6 夸克模型中超子-核子相互作用的中心力”理论物理进展 94-1（1995）。

藤田 匡(T.Fujita): "Scattering Observables of NN Interaction in the SU_6 Quark Model" Progress of Theoretical Physics. 96-2. 463-468 (1996)

T.Fujita：“SU_6 夸克模型中神经网络相互作用的散射观测”理论物理学进展 96-2（1996）。

藤原 義和(Y.Fujiwara): "Extended Time-Reversal Operator and the Symmetries of the Hyperon-Nucleon Interaction" Progress of Theoretical Physics. 97-4. 587-612 (1997)

Y.Fujiwara：“扩展时间反转算子和超子核相互作用的对称性”理论物理进展 97-4（1997）。