Structure, Formation and Decay of Dense Kaonic Nuclei

稠密核子的结构、形成和衰变

基本信息

批准号：
17340068
负责人：
YAMAZAKI Toshimitsu
金额：
$ 9.36万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2008
项目状态：
已结题

项目摘要

Studies of the structure, formation and decay of kaonic nuclei, in particular, of the most basic K-p and K-pp, have been studied. The force that produces high-density kaonic nuclei is a new type of force, which originates from a large exchange attraction of Heitler-London type, caused by a migrating K- between the two nucleons. Since this force is 4 times as strong as the ordinary nuclear force, we name it "super-strong nuclear force".Recently, chiral theories predict that the K-p state is located at 1420MeV or above and that the K--p interaction is weak, in great contrast to the presence of Lambda*(1405). We point out problems in their predictions. Experimental methods to test this hypothesis have been proposed. A new analysis of old bubble chamber data on K- absorption in 4He was made, which confirmed the Lambda* energy is 1405MeV, not 1420MeV.It was shown that the predicted dense K-pp nucleus can be formed in p+p collision, where Lambda*(1405)=K-p is produced in close proximity with the other participating proton, thus spontaneously forming K-pp at a very large sticking probability. Thus, its search in the p+p collision is in progress at GSI. Parallel to this effort, analysis of experimental results of p+p->K++ Lambda + p reaction at SATURNE-DISTO was carried out. As predicted, a deeply bound and dense K-pp state with a K- binding energy of 103MeV and a width of 120MeV was found.

已经研究了有关Kaonic核的结构，形成和衰变的研究，尤其是对最基本的K-P和K-PP的研究。产生高密度的基诺克核的力是一种新型的力，它源自Heitler-London类型的大量交换吸引力，这是由两个核之间迁移K-引起的。由于这种力与普通的核力量一样强4倍，因此我们将其称为“超强的核力量”。手性理论预测，K-P状态位于1420mev或更高，并且K-P相互作用很弱，与Lambda*（1405）的存在很大对比。我们指出了他们的预测问题。已经提出了检验该假设的实验方法。对旧气泡室数据进行4HE的旧气泡室数据进行了新的分析，该数据证实了lambda*能量为1405mev，而不是1420mev。证明可以在p+p碰撞中形成预测的密集的k-pp核，其中lambda*（1405）= k-p与其他参与量很大的参与者，从而产生了其他参与，从而占据了其他参与，从而占据了其他参与，从而占据了其他参与。概率。因此，在GSI中，它在P+P碰撞中进行了搜索。与这项工作平行，对Saturne-Disto的P+ P-> K ++ Lambda+ P反应的实验结果分析。如前所述，发现具有103mev的K结合能的深层和致密的K-PP状态，发现宽度为120meV。