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Study for the Strong Interaction using Kaonic Atom at f-factory

在 f-factory 中使用 Kaonic Atom 进行强相互作用研究

基本信息

批准号：
09044059
负责人：
IWASAKI Masahiko
金额：
$ 5.5万
依托单位：
TOKYO INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09044059/
关键词：
kaonic atom strangeness strong interaction weak interaction muon X線 CCD エキゾチックアトム

项目摘要

This project is originally started as a study of KN strong interaction by using Kaonic Atom at phi-factory DAPHINE (LNF, INEN). Because of the nature of thc strong interaction, asymptotic freedom the understanding of the low energy rcgion is quite limited. On the other hand, it is extremely important to investigate it for understanding our "frozen" universe.To understand the nature in terms of chiral symmetry and thc SU (3) symmetry, we need to know much about the role of the strangeness in the strong interaction. In this way, we can investigate how baryons and mesons get their rest mass and how they change as a function of quark and anti-quark condensation and the chiral Symmetry breaking.To investigate this, we are planning to study the KN interaction at the low energy limit and present very precise data for the ehiral explicit symmetry breaking parameter determination Lit the phi-factory.Due to the delay of the machine commissioning at DAPHINE, however, we were forced to expand our strategy for the present project and expanded our subject as follows :1) Precise measurement of the muon decay (RAL, UK)Precise determination of the Fermi coupling constant2) Measurement of the muon anomalous magnetic moment (BNL, USA)Weak interaction investigation and beyond standard model3) Deeply bound meson state in nuclear media (GSI, Germany)Meson mass chance in nuclear mediaDAPHINE stairs commissioning this year and we will present Kaonic Atom result shortly after that.

本项目最初是在DAPHINE（LNF，INEN）的phi-factory中使用K介子原子研究KN强相互作用。由于强相互作用、渐近自由等性质，对低能区域的理解是相当有限的。另一方面，研究它对于理解我们的“冻结”宇宙是极其重要的，要理解手征对称性和SU（3）对称性的本质，我们需要了解奇异性在强相互作用中的作用。通过这种方法，我们可以研究重子和介子如何获得它们的静止质量，以及它们如何作为夸克和反夸克凝聚以及手征对称性破缺的函数而变化。为了研究这一点，我们计划在低能极限下研究KN相互作用，并为手征显式对称性破缺参数的确定提供非常精确的数据。由于DAPHINE的机器调试延迟，然而，我们不得不扩展我们的计划，并将我们的课题扩展如下：1）μ子衰变的精确测量（RAL，UK）费米耦合常数的精确测定2）μ子反常磁矩的测量（BNL，USA）弱相互作用研究和超越标准模型3）核介质中的深度束缚介子态（GSI，德国）核介质中的介子质量几率DAPHINE阶梯今年投入使用，不久之后我们将发表Kaonic原子的结果。