论文标题
具有隐藏中性betaβ衰减但成功的瘦肉生成的拆分seesaw模型
A split seesaw model with hidden neutrinoless double beta decay but successful leptogenesis
论文作者
论文摘要
在阿萨卡（Asaka），伊沙田（Ishida）和田中（Tanaka）的一篇论文中，他们提出了一种新颖的可能性（将被称为AIT ANSATZ），尽管中微子的主要性质，但中子beta（$0νββ$）的衰减可能会隐藏。在原始AIT模型中，AIT ANSATZ在最小的Seesaw模型中实现，具有两个右手中微子，具有分层质量结构：较轻，更重的右手中微子比典型的Fermi-Momentum scale subleie sublei的右手中微子更轻。但是，原始AIT模型不能适应成功的瘦素发生。对于这个问题，在本文中，我们研究了一个分裂的Seesaw模型，具有一个较轻的右中微子，但两个较重的右中微子可以实现AIT ANSATZ，并同时容纳成功的瘦素发生。我们首先给出了中微子Yukawa耦合的条件，以实现AIT ANSATZ，通过采用Abelian风味对称性来讨论其实现，并研究其对将较轻的右手中微子与三个左手中微子的混合混合的意义。然后，我们连续研究了$ m^{} _ {\ rm d} $的诱变，其中$ m^{} _ {\ rm d} $是一个三角形矩阵（具有最大限制的质地零零，符合简单原则），或者尊重$ $ $ - $ - $ - $ $ the $ the y reflection symetry（这是一个既有刺激性的又有必要的刺激性的，又是一致的。
In a paper by Asaka, Ishida and Tanaka \cite{hiding}, they proposed a novel possibility (which will be referred to as the AIT ansatz) that, in spite of the Majorana nature of neutrinos, the neutrinoless double beta ($0νββ$) decay can be hidden. In the original AIT model, the AIT ansatz is realized in the minimal seesaw model with two right-handed neutrinos which have a hierarchical mass structure: the lighter and heavier right-handed neutrinos are respectively much lighter and heavier than the typical Fermi-momentum scale of nuclei. However, the original AIT model does not accommodate a successful leptogenesis. For this problem, in this paper we study a split seesaw model with one lighter right-handed neutrino but two heavier right-handed neutrinos which can realize the AIT ansatz and accommodate a successful leptogenesis simultaneously. We first give the condition on the neutrino Yukawa couplings for realizing the AIT ansatz, discuss its realization by employing an Abelian flavor symmetry, and study its implications for the mixing of the lighter right-handed neutrino with three left-handed neutrinos. We then successively study the implications for leptogenesis of the interesting scenarios where $M^{}_{\rm D}$ is a triangular matrix (which has maximally-restricted texture zeros, in line with the simplicity principle) or respects the $μ$-$τ$ reflection symmetry (which is well motivated by the experimental results), on top of the AIT ansatz.
