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arXiv 2603.01031hep-ph
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探测P2SO中PMNS矩阵的非幺正性及与DUNE的比较

Probing non-unitarity of the PMNS matrix in P2SO and comparison with DUNE

School of Physics, University of Hyderabad(海德拉巴大学物理学院);Center of Excellence for Advanced Materials and Sensing Devices, Ruđer Bošković Institute(鲁德·博什科维奇研究所先进材料与传感设备卓越中心)

Sambit Kumar Pusty, Samiran Roy, Monojit Ghosh, Rukmani Mohanta

AI总结:

本文在模型无关框架下比较了P2SO和DUNE实验对轻子混合矩阵非幺正性的灵敏度,发现DUNE对α11和|α21|约束更强,而P2SO因基线更长和物质效应更强对α22和α33更敏感。

摘要:

我们比较了即将开展的长基线中微子实验Protvino to Super-ORCA (P2SO) 和深地下中微子实验 (DUNE) 在模型无关框架下对轻子混合矩阵非幺正性 (NU) 的灵敏度。NU可能出现在包含重中性轻子的标准模型之外的理论中。这些效应可以修改中微子振荡概率,并引入新的CP破坏源,可能影响中微子参数的精确测量。我们发现DUNE对$α_{11}$和$|α_{21}|$提供了更强的约束,而P2SO对$α_{22}$和$α_{33}$表现出更好的灵敏度,这主要归因于其更长的基线和更强的物质效应。我们的结果表明,DUNE (P2SO) 将能够改进当前对$α_{11}$ ($α_{33}$) 的约束。我们进一步研究了与标准振荡参数的相关性,并量化了NU对质量层次、八分圆和CP破坏灵敏度的影响。我们的结果表明,这些灵敏度以非平凡的方式依赖于NU,涉及参数简并和物质效应的相互关联。我们的结果证明了P2SO和DUNE在探测NU方面的互补性,并表明NU可以显著影响下一代精确振荡研究。

英文摘要:

We compare the sensitivity of the upcoming long-baseline neutrino experiments Protvino to Super-ORCA (P2SO) and the Deep Underground Neutrino Experiment (DUNE) to non-unitarity (NU) of the leptonic mixing matrix in a model-independent framework. NU can arise in theories beyond the Standard Model that include heavy neutral leptons. These effects can modify neutrino oscillation probabilities and introduce new sources of CP violation, which may affect precision measurements of neutrino parameters. We find that DUNE provides stronger bounds on $α_{11}$ and $|α_{21}|$, while P2SO shows better sensitivity to $α_{22}$ and $α_{33}$, mainly due to its longer baseline and stronger matter effects. Our results show that DUNE (P2SO) will be able to improve the current bounds of $α_{11}$ ($α_{33}$). We further examine correlations with standard oscillation parameters and quantify the impact of NU on mass hierarchy, octant, and CP-violation sensitivities. Our results show that these sensitivities depend upon NU in a non-trivial way interconnecting the parameter degeneracies and matter effects. Our results demonstrate the complementarity of P2SO and DUNE in probing NU and show that NU can significantly influence next-generation precision oscillation studies.

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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