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arXiv 1107.0739hep-ph
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逆跷跷板机制如何揭示其自然、正则和与右手中微子质量无关

How the Inverse See-Saw Mechanism Can Reveal Itself Natural, Canonical and Independent of the Right-Handed Neutrino Mass

A. G. Dias, C. A. de S. Pires, P. S. Rodrigues da Silva

摘要:

在中微子质量产生的文献中,常见的说法是,规范的跷跷板机制很好地解释了微小的中微子质量,但代价是引入了右手中微子,其规模超出了当前实验的范围。反向跷跷板机制是一个有趣的替代规范一旦它导致微小的中微子质量的优势是可测试的TeV规模。然而,这最后一种机制存在一个自然性问题,即与轻子数破坏有关的参数$μ$,它应该在keV尺度上,比电弱尺度低得多。然而,没有建立任何理论框架来解释获得这一特定规模的原因。在这项工作中,我们提出了一个变化的反向跷跷板机制,通过假设一个最小的标量和费米子集的单态场,随着$Z_5\otimes Z_2$对称性,这使得一个动力学解释的小$μ$,恢复整洁的正则跷跷板公式和右手(RH)中微子自由地在电弱标度,从而在大型强子对撞机和当前的中微子实验可检验。

英文摘要:

The common lore in the literature of neutrino mass generation is that the canonical see-saw mechanism beautifully offers an explanation for the tiny neutrino mass but at the cost of introducing right-handed neutrinos at a scale that is out of range for the current experiments. The inverse see-saw mechanism is an interesting alternative to the canonical one once it leads to tiny neutrino masses with the advantage of being testable at TeV scale. However, this last mechanism suffers from an issue of naturalness concerning the scale responsible for such small masses, namely, the parameter $μ$ that is related to lepton number violation and is supposed to be at the keV scale, much lower than the electroweak one. However, no theoretical framework was built that offers an explanation for obtaining this specific scale. In this work we propose a variation of the inverse see-saw mechanism by assuming a minimal scalar and fermionic set of singlet fields, along with a $Z_5\otimes Z_2$ symmetry, that allows a dynamical explanation for the smallness of $μ$, recovering the neat canonical see-saw formula and with right-handed (RH) neutrinos free to be at the electroweak scale, thus testable at LHC and current neutrino experiments.

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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