The fate of hints: updated global analysis of three-flavor neutrino oscillations
The fate of hints: updated global analysis of three-flavor neutrino oscillations
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DOI：
10.1007/jhep09(2020)178
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发表时间：
2020-09-28
影响因子：
5.4
通讯作者：
Zhou, Albert
中科院分区：
文献类型：
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作者：
Esteban, Ivan;Gonzalez-Garcia, M. C.;Zhou, Albert
我们在这里描述的最新中微子振荡数据的组合分析在Neutrino 2020会议上显示，中微子质量排序的先前提示已显着下降，正常有序（NO）仅在1.6西格玛水平上有利。结合Super-Kamiokande为他们的大气中微子数据分析提供的chi（2）图，NO的暗示是在2.7 σ。CP守恒值delta（CP）= 180度在全局最佳拟合点的0.6 sigma内。只有当我们限制到反向质量排序时，CP破坏才有利于类似于3 σ水平。我们讨论了这些结果的起源-这是由T2 K和NOvA长基线实验的新数据驱动的-以及LBL反应堆振荡频率互补性的相关性。KamLAND和太阳实验所采用的m（21）（2）中的2.2 σ张力在包含最新的Super-Kamiokande太阳中微子结果后也降低到1.1 σ水平。最后，我们提出了更新的允许范围的振荡参数和轻子Jarlskog行列式的全球分析。
Our herein described combined analysis of the latest neutrino oscillation data presented at the Neutrino2020 conference shows that previous hints for the neutrino mass ordering have significantly decreased, and normal ordering (NO) is favored only at the 1.6 sigma level. Combined with the chi(2) map provided by Super-Kamiokande for their atmospheric neutrino data analysis the hint for NO is at 2.7 sigma. The CP conserving value delta(CP) = 180 degrees is within 0.6 sigma of the global best fit point. Only if we restrict to inverted mass ordering, CP violation is favored at the similar to 3 sigma level. We discuss the origin of these results - which are driven by the new data from the T2K and NOvA long-baseline experiments -, and the relevance of the LBL-reactor oscillation frequency complementarity. The previous 2.2 sigma tension in m(21)(2) preferred by KamLAND and solar experiments is also reduced to the 1.1 sigma level after the inclusion of the latest Super-Kamiokande solar neutrino results. Finally we present updated allowed ranges for the oscillation parameters and for the leptonic Jarlskog determinant from the global analysis.