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arXiv 2502.09286hep-phhep-exhep-th
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规范跷跷板与反跷跷板机制能否产生涌现的大味混合?

Emergent large flavor mixing from canonical and inverse seesaws?

Zhi-zhong Xing

AI总结:

针对规范跷跷板机制无法解释活性中微子大味混合的问题,提出交叉跷跷板框架将其视为涌现结果;引入反跷跷板机制降低重中微子质量尺度时,大味混合也为涌现现象,并比较了味基与质量基的跷跷板关系。

摘要:

规范跷跷板机制为三个活性中微子的微小质量提供了最自然的定性解释,但无法解释其大味混合效应。后者可视为该机制的涌现结果,此时我们会得到一个涉及所有六个马约拉纳中微子质量基的有趣交叉跷跷板框架。为降低重中微子的质量尺度,人们有动机引入反跷跷板机制,但需付出代价:其两组新自由度间需精细调节以抵消,此时活性味混合的大尺度也是一种涌现现象。此外,还比较了味基中的近似跷跷板关系与质量基中的精确跷跷板关系。

英文摘要:

While the canonical seesaw mechanism provides a most natural qualitative interpretation of tiny masses for the three active neutrinos, it offers no explanation for their large flavor mixing effects. The latter can be regarded as an emergent consequence of this mechanism, in which case we are left with an intriguing cross seesaw framework in the mass basis of all the six Majorana neutrinos. To lower the mass scales of heavy neutrinos, one is motivated to invoke the inverse seesaw mechanism but has to pay the price for a fine-tuned cancellation between its two sets of new degrees of freedom, in which case the largeness of active flavor mixing is an emergent phenomenon as well. A comparison between the approximate seesaw relations in the flavor basis and those exact ones in the mass basis is also made.

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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