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arXiv 1909.01552hep-ph
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在当前实验条件下检验两个零中微子质量矩阵的织构

Testing Texture Two Zero Neutrino Mass Matrices Under Current Experimental Scenario

Madan Singh

摘要:

普朗克合作的最新数据提出了一个改进的灵敏度极限的总和中微子质量($Σ$),$Σ<0.17eV$在95 $\%$置信水平(CL)。另一方面,更新的中微子振荡的全球拟合显示了一个精细的范围内的大气混合角$θ_{23}$在相同的CL。根据这些观察,我们重新研究了五个可行的情况下($B_{1, 2, 3, 4}$和$C$)的纹理二零马约拉纳质量矩阵的风味基础。使用目前的普朗克数据,我们已经证明,只有情况下$B_{2}$和$B_{4}$现在是可行的正常质量排序,而其余三种情况下不符合目前的实验限制在2 $σ$ CL。可行的情况下,也被发现是在协议与最新的T2 K,超级神冈和NO $ν$ A的结果,表明正常的中微子质量排序($m_{1} < m_{2}<m_{3}$),最大狄拉克CP破坏相($δ\simeq 270^{0}$),和中微子混合角上八分圆($θ_{23} > 45^{0}$)的偏好。此外,$Σ$对中微子双β衰变的影响进行了研究可行的情况下。

英文摘要:

The latest data from Planck collaboration has presented an improved sensitivity limit of the sum of neutrino masses ($Σ$), $Σ<0.17eV$ at 95$\%$ confidence level (CL). On the other hand, the updated global fits of neutrino oscillation have shown a refined range of atmospheric mixing angle $θ_{23}$ at the same CL. In the light of these observations, we have re-investigated the five viable cases ( $B_{1, 2, 3, 4}$ and $C$) of texture two zero Majorana mass matrix in the flavor basis. Using the present Planck's data, we have demonstrated that only cases $B_{2}$ and $B_{4}$ are now viable for normal mass ordering, while remaining three cases does not meet the present experimental constraints at 2$σ$ CL. The viable cases are also found to be in agreement with the latest T2K, Super-Kamiokande and NO$ν$A results, indicating the preference for normal neutrino mass ordering ($m_{1} < m_{2}<m_{3}$), a maximal Dirac CP-violating phase ($δ\simeq 270^{0}$), and upper octant of neutrino mixing angle ($θ_{23} > 45^{0}$). In addition, the implication of $Σ$ on neutrinoless double beta decay is studied for viable cases.

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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