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arXiv 1206.1966hep-ph
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在没有双电荷Higgs的右手中微子331模型中的中微子质量

Neutrino masses in a 331 model with right-handed neutrinos without doubly charged Higgs

M. E. Cataño, R Martínez, F. Ochoa

摘要:

我们讨论了一个含有三个标量三重态和中性费米子单重态的331模型。我们表明,在331模型与右手中微子,它是可能的,以获得小的活性中微子质量通过双和逆跷跷板机制,而不使用标量六重态或三重态与双电荷希格斯粒子。两种类型的模型进行了讨论。如果我们有一个大的马约拉纳质量矩阵的单线态,中微子的光谱呈现轻,重和非常重的质量。另一种可能性是小(零)马约拉纳质量矩阵,它导致除了活跃的轻中微子外,还有TeV量级的伪狄拉克(Dirac)重中微子

英文摘要:

We discuss a 331 model with three scalar triplets and neutral fermion singlets. We show that in the 331 model with right-handed neutrinos, it is possible to obtain small active neutrino masses via the double and inverse seesaw mechanisms, without the use of scalar sextets or triplets with doubly-charged Higgs. Two types of models are discussed. If we have a large Majorana mass matrix for the singlets, the spectrum of neutrinos presents light, heavy and very heavy masses. The other possibility is a small (zero) Majorana mass matrix, which leads to pseudo-Dirac (Dirac) heavy neutrinos in the TeV scale, in addition to the active light neutrinos

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