arXiv 2201.049772022-01hep-ph

对CP破坏和重子不对称符号的次三极大混合

Next-to-tribimaximal mixing against CP violation and baryon asymmetry signs

Shao-Ping Li, Yuan-Yuan-Li, Xin-Shuai Yan, Xin Zhang

备注：: 8 pages, 4 figures, Published version in PRD
发表信息：: Phys. Rev. D 105 (2022) 9, 096008
DOI：: 10.1103/PhysRevD.105.096008

摘要：

四个次三双峰（NTBM）混合模式被广泛认为是所观察到的轻子混合结构的可行候选者。利用最近的T2 K测量结果，以及密集的全局拟合，在正常序中Dirac CP破坏相的$\sinδ_{ CP} > 0$的间隔持续很小，而在逆序中$\sinδ_{ CP} < 0$连续获得直到$3σ$水平.本文推广了Dirac CP破坏相位作为约束条件的拟合结果，并指出，仅从三个混合角出发，基本上可以排除约束条件所允许的一半区域。此外，由于小的$\sinδ_{ CP} > 0$间隔，我们发现，一个独特的NTBM模式可以选择出的四个候选人内的$3σ$不确定性的最新NuFIT 5.1，当图案暴露于汤川纹理独立leptogenesis的重子不对称性的宇宙。对于幸存的模式，我们发现一个有趣的狄拉克CP违反相位和大气角$θ_{23}$的八分圆之间的相关性，其中$θ_{23}>45^\circ$可以预测一旦$5π/6 < δ_{CP} <π$在正常的顺序可以在未来的测量中得到确认。

英文摘要：

Four next-to-tribimaximal (NTBM) mixing patterns are widely considered as the feasible candidates for the observed leptonic mixing structure. With the recent measurements from T2K, as well as intensive global fits, the interval of $\sinδ_{ CP} > 0$ for the Dirac CP-violating phase is persistently small in the normal ordering while $\sinδ_{ CP} < 0$ is successively obtained up to $3σ$ level in the inverted ordering. In this paper, we advocate the fitting results of Dirac CP-violating phase as a constraint, and show that, it can basically rule out half of the regions allowed by the constraint from three mixing angles only. In addition, given the small $\sinδ_{ CP} > 0$ interval, we find that a unique NTBM pattern can be selected out of the four candidates within $3σ$ uncertainty of the latest NuFIT 5.1, when the patterns are exposed to a Yukawa texture-independent leptogenesis for the baryon asymmetry of the Universe. For the surviving pattern, we find an interesting correlation between the Dirac CP-violating phase and the octant of atmospheric angle $θ_{23}$ , where $θ_{23}>45^\circ$ can be predicted once $5π/6 < δ_{CP} <π$ in the normal ordering can be confirmed in the future measurements.

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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英文摘要：

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