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arXiv 1402.0150hep-ph
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夸克、轻子、轻子CP破坏和无中微子$ββ$衰变的现实模型

Towards a realistic model of quarks and leptons, leptonic CP violation and neutrinoless $ββ$-decay

Y. H. Ahn, Paolo Gondolo

备注：
41 pages and 13 figures, references added, version to appear in PRD; the model is changed slightly without corrupting the numerical results
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摘要：

为了自然地解释费米子质量和混合，我们引入了一个特定的味道对称性和质量抑制模式，约束费米子汤川耦合的味道结构。我们的模型描述了为什么中微子质量的层次结构比带电费米子质量的层次结构更温和的连续的flavon领域的权力。我们调查CP破坏和无中微子双β（$0νββ$）衰变，并显示如何可以预测和约束我们的模型，目前和即将到来的实验数据。我们的模型预测，对于正常中微子质量序（NO），大气中微子混合角$θ_{23}$应在$45^\circ$的$\sim1^{\circ}$以内;对于反转中微子质量序（IO），大气中微子混合角$θ_{23}$应在$45^\circ$的$\sim4^\circ$和$\sim8^\circ$度之间。对于NO和IO，我们的模型预测，$0νββ$马约拉纳质量在有限的范围$0.035 \text{eV}<|m_{ee}|\lesssim0.15$ eV，这可以在当前的实验中进行测试。此外，我们的模型可以成功地容纳无味leptogenesis作为机制，以产生重子的不对称性在宇宙中，提供中微子的质量排序是正常的，$|m_{ee}|\simeq0.072\pm0.012$ eV，和$θ_{23}\simeq44^{\circ}$和狄拉克CP破坏相$δ_{CP}\simeq20^{\circ}$或$60^{\circ}$，或$θ_{23}\simeq46^{\circ}$和$δ_{CP} \simeq205^{\circ}$或$245^{\circ}$。

英文摘要：

In order to explain the fermion masses and mixings naturally, we introduce a specific flavor symmetry and mass suppression pattern that constrain the flavor structure of the fermion Yukawa couplings. Our model describes why the hierarchy of neutrino masses is milder than the hierarchy of charged fermion masses in terms of successive powers of flavon fields. We investigate CP violation and neutrinoless double beta ($0νββ$) decay, and show how they can be predicted and constrained in our model by present and upcoming experimental data. Our model predicts that the atmospheric neutrino mixing angle $θ_{23}$ should be within $\sim1^{\circ}$ of $45^\circ$ for the normal neutrino mass ordering (NO), and between $\sim4^\circ$ and $\sim8^\circ$ degrees away from $45^\circ$ (in either direction) for the inverted neutrino mass ordering (IO). For both NO and IO, our model predicts that a $0νββ$ Majorana mass in the limited range $0.035 \text{eV}<|m_{ee}|\lesssim0.15$ eV, which can be tested in current experiments. Moreover, our model can successfully accommodate flavorless leptogenesis as the mechanism to generate the baryon asymmetry in the Universe, provided the neutrino mass ordering is normal, $|m_{ee}|\simeq0.072\pm0.012$ eV, and either $θ_{23}\simeq44^{\circ}$ and the Dirac CP-violating phase $δ_{CP}\simeq20^{\circ}$ or $60^{\circ}$, or $θ_{23}\simeq46^{\circ}$ and $δ_{CP} \simeq205^{\circ}$ or $245^{\circ}$.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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