Radiative Neutrino Mass Hypothesis and Quark and Lepton Unification Model

辐射中微子质量假说和夸克轻子统一模型

• 批准号: 15540283
• 负责人: KOIDE Yoshio
• 金额: $ 1.02万
• 依托单位: University of Shizuoka
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15540283/
• 关键词: neutrinos; grand unification theory; supersymmetry; quarks and leptons; mass matrix; radiative mass; neutrino oscillation; flavor mixing; ニュートリノ

As a neutrino mass generation mechanism, two antithetical ideas are known: One is the so-called seesaw mass generation mechanism, and another one is the radiative mass generation mechanism. Currently, the former idea is influential, because it is hard to embed the latter model into a grand unification theory (GUT). A supersymmetric (SUSY) model with R-parity violation can provide neutrino masses radiatively, but the model cannot be embedded into GUT, because the R-parity violating terms induce proton decay catastrophically. The purpose of the present research project was to reveal whether the difficulty in the radiative neutrino mass hypothesis cannot absolutely avoid in the theory, or it can basically be overcome although it is not easy for the time being. Our result is as follows: The difficulty in the radiative mass generation in the SUSY GUT model is not an inevitable trouble in the theory. Indeed, we have demonstrated that the radiative mass generation without a rapid proton decay is possible in the framework of a SUSY GUT model [PRD68, 2003; PLB547, 2003; PLB595, 2004]. Phenomenological topics related to this subject have also been investigated.

作为中微子质量产生机制，有两种对立的观点：一种是所谓的跷跷板质量产生机制，另一种是辐射质量产生机制。目前，前一种思想是有影响力的，因为很难将后一种模型嵌入大统一理论（GUT）。具有R宇称破坏项的超对称模型可以辐射地提供中微子质量，但由于R宇称破坏项会引起质子的灾变衰变，因此该模型不能嵌入大统一理论。本研究项目的目的是揭示辐射中微子质量假说中的困难在理论上是绝对不能避免的，还是虽然暂时不容易但基本上可以克服的。结果表明：SUSY GUT模型中辐射质量产生的困难并不是理论上不可避免的问题。事实上，我们已经证明，在SUSY GUT模型的框架中，没有快速质子衰变的辐射质量产生是可能的[PRD 68，2003; PLB 547，2003; PLB 595，2004]。与此相关的现象学主题也进行了研究。

项目成果

Neutrino Oscillations and their Origin

中微子振荡及其起源

• 发表时间: 2004
• 作者: Y.Suzuki;et al.
• 通讯作者: et al.

What happens if an unbroken flavor symmetry exists?

如果存在完整的风味对称性，会发生什么？

• 发表时间: 2005
• 期刊: Physical Review D 71
• 作者: Y.Koide

Non-Exponential Decay of Unstable System : Small--Value S-Wave Decay

不稳定系统的非指数衰减:小值横波衰减

• 发表时间: 2005
• 期刊: Physical Review A 71
• 作者: Y.Koide;T.Jittoh
• 通讯作者: T.Jittoh

Radiative neutrino masses in a SUSY GUT model

SUSY GUT 模型中的辐射中微子质量

• 发表时间: 2003
• 期刊: Physics Letters B 547
• 作者: Koide;Y.;Yoshio Koide;Yoshio Koide;Y.Koide;Y.Koide;Y.Koide
• 通讯作者: Y.Koide

Universal texture of quark and lepton mass matrices with an extended flavor 2 3 symmetry

• DOI: 10.1103/physrevd.69.093001
• 发表时间: 2003-12
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Yoshio Koide