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The origin of elementary particle interaction

基本粒子相互作用的起源

基本信息

批准号：
06302020
负责人：
SANDA Ichiro
金额：
$ 7.68万
依托单位：
NAGOYA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06302020/
关键词：
CP violation B meson B factory GUT SUSY KM matrix NNI Mass matrix 湯川結合定数大統一理論超対称理論超弦理論ブラックホールクォークの質量 KM行列電弱対称性 B中間子 CPの破れ

项目摘要

1) The origin of CP violationWhile observed CP violation in K decay is only 0.2%, the KM model predicts nearly 100% CP violating effects in B decays. To understand the origin of CP violation it is crucial to discover this large CP violation. To achieve this goal, large number of B mesons must be created and the decay modes must be studied. At present B factory is being constructed at KEK and at SLAC.Both laboratories are competing against each other with the top level technology and physics. As a member of the Japanese high energy community we hope to see KEK discover CP violation first. To achieve this goal, we have initiated a study group to support this activity at KEK.The origin of quark massesA) Within the framework of SUSY GUT,Georgi-Jarlskog mass matrix was studied. The result of this study was that G-J matrix does not adequately explain the values of the KM matrix and the quark mass spectrum. How to get phases in to the mass matrix at the GUT scale is an important topic of the future study.B) The NNI formGeneral quark matrices have 36 parameters. It has been shown that when they are transformed to the NNI form, a general mass matrices can be written in terms of 12 parameters. Out of these, 6 can be fixed with 6 quark masses. We have succeeded in fixing 4 other parameters using the KM matrix.

1) CP违背的起源虽然K衰变中观测到的CP违背仅为0.2%，但KM模型预测B衰变中几乎100%的CP违背效应。为了理解CP破缺的起源，发现这种大的CP破缺至关重要。为了实现这一目标，必须产生大量的B介子，并对其衰变模式进行研究。目前B工厂正在KEK和SLAC建设中。两个实验室都在用顶尖的技术和物理相互竞争。作为日本高能界的一员，我们希望KEK能首先发现CP违反。为了实现这一目标，我们在KEK发起了一个研究小组来支持这项活动。在SUSY GUT框架下，研究了georgia - jarlskog质量矩阵。本研究的结果是G-J矩阵不能充分解释KM矩阵和夸克质谱的值。如何在GUT尺度下将相引入到质量矩阵中是未来研究的重要课题。B)一般夸克矩阵有36个参数。结果表明，当它们转换成NNI形式时，一般的质量矩阵可以用12个参数表示。其中6个可以用6个夸克质量固定。我们已经成功地使用KM矩阵固定了另外4个参数。