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arXiv 1706.02555hep-phhep-ex
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重访大中微子磁矩

Revisiting Large Neutrino Magnetic Moments

Manfred Lindner, Branimir Radovčić, Johannes Welter

摘要:

目前实验对中微子磁矩的灵敏度比标准模型预测的高出许多个数量级。因此,下一代实验的潜在测量将强烈要求新的物理学超越标准模型。然而,大的中微子磁矩一般倾向于引起对中微子质量的大的修正,并导致微调。我们证明了在中微子质量正比于中微子磁矩的模型中。我们重新审视,讨论和提出的机制,仍然提供了理论上一致的解释大中微子磁矩的潜在测量。我们发现只有两种可行的机制来实现大的过渡磁矩的马约拉纳中微子。

英文摘要:

Current experimental sensitivity on neutrino magnetic moments is many orders of magnitude above the Standard Model prediction. A potential measurement of next-generation experiments would therefore strongly request new physics beyond the Standard Model. However, large neutrino magnetic moments generically tend to induce large corrections to the neutrino masses and lead to fine-tuning. We show that in a model where neutrino masses are proportional to neutrino magnetic moments. We revisit, discuss and propose mechanisms that still provide theoretical consistent explanations for a potential measurement of large neutrino magnetic moments. We find only two viable mechanisms to realize large transition magnetic moments for Majorana neutrinos only.

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