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CP violating Particle Physics Models and Baryogenesis

CP 违反粒子物理模型和重子发生

基本信息

批准号：
08640357
负责人：
SUGAMOTO Akio
金额：
$ 1.41万
依托单位：
Ochanomizu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640357/
关键词：
CP violating Particle Model Baryogenesis Beyond Standard Model Supersymmetric Model Vector-like quark Model WWZ inthactim HERA anomaly photon-photon collider バリオン生成拡張された標準模型超対称模型ベクトルライク・クォーク模型 WWZ相互作用宇宙のバリオン生成ベクトル型クォーク C

项目摘要

In this research, CP violating models in particle physics and their baryogensis scenarios in our universe are studied. As such CP violating models, we have taken up the standard model, The supersymmetric model, and the vector-like quark model.As well as the baryogenesis, neutron electric dipole moment, various decays of B meson, production of weak bosons by electron positron collision are also studied, in order to find signals beyond the standard model.Furthermore, HERA "anomaly" observed in the positron-proton collider is examined. Physics of photon-photon collider is also studied, which will be our next research project.More concretely :1. Baryogenesis scenarios based on the special CP violations inherent in the vector-like quark mode and in the supersymmetric model are studied, so that the obseved value of the baryon number in our universe is well predicted. Especially in the supersymmetric model, the CP violation responsible for the baryon number of our universe may be observed in the neutron electric dipole moment experiment, if the detection accuracy will be one order of magnitude improved.2. The semi-leptonic and hadronic decays of B meson are evaluated, and CP asymmetry test is examined based on these decays. Especially, evaluation of the decay rate of B going to K and eta-prime is carried out, proposing a non-spectator mechanism. Our prediction is in good agreement with the unexpectedly large obseved decay rate.4. A possibility of observing the CP violation of the supersymmetric model is pointed out, in a future experiment of producing a pair of weak bosons in the electron positom collision.5. R-parity violating supersymmetic model which may explain the HERA "anomaly" is further restricted by other experiments.6. Intereference effects are examined between the heavy scalar and the pseudo-scalar Higgs particles produced in the intermediate state of the photon photon collision.

本文研究了粒子物理学中的CP破坏模型及其在宇宙中的重子生成方案。作为CP破坏模型，我们采用了标准模型、超对称模型和类矢量夸克模型，研究了重子生成、中子电偶极矩、B介子的各种衰变、电子-正电子碰撞产生弱玻色子等问题，以寻找标准模型之外的信号，并对正电子-质子对撞机上观测到的HERA“异常”进行了检验。本文还对光子-光子对撞机的物理进行了研究，这是我们下一步的研究方向。本文研究了基于类矢量夸克模和超对称模型中固有的特殊CP破坏的重子生成方案，从而较好地预言了我们宇宙中重子数的观测值。特别是在超对称模型下，如果探测精度提高一个数量级，那么在中子电偶极矩实验中就有可能观测到导致宇宙重子数的CP破坏.计算了B介子的半轻子和强子衰变，并在此基础上检验了CP不对称性检验。特别地，对B到K和η素数的衰减率进行了评估，提出了一种非旁观者机制。我们的预测与观察到的出乎意料的大衰变率非常一致。指出了在未来的正负电子碰撞产生一对弱玻色子的实验中观测到超对称模型CP破坏的可能性.可以解释HERA“反常”的R宇称破坏超对称模型进一步受到其他实验的限制.研究了光子-光子碰撞中间态中产生的重标量和赝标量希格斯粒子之间的干涉效应。