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

基本信息

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

项目摘要

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.

该项目的目的是研究组成夸克模型中的超核子相互作用。我们通过结合了作用于夸克之间的所有伪量表中的梅森 - 梅森 - 非交换，改善了RGM-F的有效介子交换势。明确计算了这些有效的介子交换势的夸克交换内核的自旋培养因子。然后使用我们的Quark模型FSS和RGM-H的新版本研究在宽的能量范围内的Hyperon-Nucleon相互作用的散射。 KEK实验KEK-PS E251在中间能量中给出了Sigma^+P散射截面的新数据，这与我们的Quark-Model预测不一致。通过分析KEK-PS E289实验，可以预期对AP和Sigma^-P散射进行进一步的实验数据。我们已经开发了夸克RGM（共振组方法）的Lippmann-Schwinger形式主义，以接近更高的能量，在这种情况下，到目前为止使用的散射方法无法产生准确性。通过这种改进，我们计算了PP和NP弹性散射到800 MeV的入射能的差分截面和极化。能量依赖性和角度分布的总体行为是定性复制的。该技术还用于计算核子核子相互作用的G-Matrix，并在FS中进行核物质计算。饱和点位于高密度侧的Coester线附近。我们还通过使用RGM-F检查了Baryon-Baryon与Stangeness S = -2的相互作用。RGM-F中H颗粒的结合能为19 MeV，P_的预测XI^-P总横截面<xi> = 500 meV/c是sigma_ <el>（xi^-p）= 26mb，sigma（xi^-p*xi^0n）= 23mb和sigma（xi^-p*lambdalambda）= 18mb。