探索具有跷跷板机制的轴子模型中的自发 CP 违约现象

IF 0.8 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Journal of the Korean Physical Society Pub Date : 2024-07-31 DOI:10.1007/s40042-024-01143-2
Y. H. Ahn, Sin Kyu Kang
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引用次数: 0

摘要

我们研究了旨在实现自发CP违反的Dine-Fischler-Srednicki-Zhitnitsky(DFSZ)模型的扩展。通过引入单重马约拉纳中微子和一个额外的新单重标量,我们制定了扩展模型的尤卡娃拉格朗日和标量势,强调了它们在诱发CP违反中的关键作用。这项研究揭示了CP可以在1环水平自发破缺,而标量势中产生的四元耦合对诱导自发CP违反起着至关重要的作用。我们讨论了该模型对新轴子的影响。通过提出最小跷跷板框架内的轻子汤川拉格朗日和狄拉克中微子质量矩阵结构,我们研究了扩展 DFSZ 模型产生的 CP 违反相与庞特科沃-牧-中川-阪田(PMNS)混合矩阵相之间的相互关系。我们进行了简短的数值分析,以说明扩展的DFSZ模型与观测到的中微子振荡参数的兼容性,从而提供了对轻子CP违反起源的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Exploring spontaneous CP violation in an axion model with seesaw mechanism

We investigate an expansion of the Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) model aiming at realizing spontaneous CP violation. By introducing singlet heavy Majorana neutrinos and an additional new singlet scalar, we formulate the Yukawa Lagrangian and scalar potential for the extended model, highlighting their pivotal role in inducing CP violation. This study reveals that CP can spontaneously be broken at the 1-loop level, facilitated by the generation of the quartic couplings in the scalar potential which are imperative for inducing spontaneous CP violation. We discuss the implications of the model on the new axion. By presenting the leptonic Yukawa Lagrangian and the structure of the Dirac neutrino mass matrix within the minimal seesaw framework, we study the interply between the CP-violating phase arising from the extended DFSZ model and the phases of the Pontecorvo–Maki–Nakagawa–Sakata (PMNS) mixing matrix. A brief numerical analysis is conducted to illustrate the compatibility of the extended DFSZ model with observed neutrino oscillation parameters, providing insights into the origin of leptonic CP violation.

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来源期刊
Journal of the Korean Physical Society
Journal of the Korean Physical Society PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.20
自引率
16.70%
发文量
276
审稿时长
5.5 months
期刊介绍: The Journal of the Korean Physical Society (JKPS) covers all fields of physics spanning from statistical physics and condensed matter physics to particle physics. The manuscript to be published in JKPS is required to hold the originality, significance, and recent completeness. The journal is composed of Full paper, Letters, and Brief sections. In addition, featured articles with outstanding results are selected by the Editorial board and introduced in the online version. For emphasis on aspect of international journal, several world-distinguished researchers join the Editorial board. High quality of papers may be express-published when it is recommended or requested.
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