论文标题
预测性$ s_4 $ flavon型号，带有$ \ text {tm} _1 $混合和通过瘦化生成
Predictive $S_4$ flavon model with $\text{TM}_1$ mixing and baryogenesis through leptogenesis
论文作者
论文摘要
我们使用$ S_4 $离散组来构建中微子风味模型，该模型导致$ TM_1 $混合，并且与中微子振荡数据一致。使用模型的约束参数空间，我们分别将DIRAC $ CP $相位和光中微子质量的值分别为$ -1 <\sinΔ<-0.9 $和$ 1.7 <m_1（\ text {mev}）<5.5 $。我们彻底检查了该模型在解释观察到的宇宙的重子不对称时的实用性。 CP对称性的近乎最大破坏（由于$ \ text {tm} _1 $约束而引起的）有助于我们通过瘦化生成产生足够的重骨不对称性。我们以两种不同的方式（i）使用近似的分析解决方案来研究从原始宇宙开始从原始宇宙开始从原始宇宙开始的不对称性的演变（由于沉重的主要中微子的衰变），我们已经显示出其等效性的程度。此后，使用几乎准确的分析拟合来评估Baryon不对称的整个参数空间，允许$3σ$的全局振荡数据拟合，并对Dirac Neutrino质量矩阵的尚未结合的质量尺度参数施加限制。此外，还估计了在调味的瘦素发生下$ n_2 $衰减的显着贡献。
We use $S_4$ discrete group to construct a neutrino flavour model which leads to $TM_1$ mixing and is consistent with the neutrino oscillation data. Using the model's constrained parameter space, we predict the values of Dirac $CP$ phase and the light neutrino mass as $-1<\sin δ<-0.9$ and $1.7<m_1 (\text{meV})<5.5$ respectively. We thoroughly examine the usefulness of this model in explaining the observed baryon asymmetry of the Universe. Near-maximal breaking of CP symmetry (arising due to the $\text{TM}_1$ constraint) helps us in generating adequate baryon asymmetry through leptogenesis. We study the evolution of the asymmetry (generated due to the decay of the heavy Majorana neutrinos) starting from the primordial Universe in two different ways (i)explicitly solving network of Boltzmann equations, (ii) using approximate analytic solution and we have shown the extent of their equivalence. Nearly accurate analytical fits are used thereafter to evaluate baryon asymmetry for the whole parameter space allowed by $3σ$ global fit of oscillation data and to impose a constraint on the yet unbounded mass scale parameter of Dirac neutrino mass matrix. Furthermore, significant contribution of $N_2$ decay in the context of flavoured leptogenesis is also estimated.
