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arXiv 1012.2715hep-ph
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双跷跷板中微子质量的伴随费米子SO(10)模型

An SO(10) model with adjoint fermions for double seesaw neutrino masses

Joydeep Chakrabortty, Srubabati Goswami, Amitava Raychaudhuri

摘要:

在$SO(10)$模型中,使用$10_H$和$120_H$表示来产生费米子质量是相当有预测性的,尽管由于没有$SU(2)_{L,R}$三重态/单重态场,它不能通过通常的I型或II型跷跷板机制产生中微子质量。在本文中,中微子质量,我们提出了这样的$SO(10)$模型的扩展,通过添加费米子的伴随表示(${45}_F$)和对称性破缺标量$\bar{16}_H$。$\bar{16}_H$将伴随费米子与${16}_F$中的标准费米子耦合,并通过"双跷跷板“机制诱导中微子质量。为了提高模型的预测性,我们施加$μ-τ$味对称的汤川矩阵的$10_H$和$\bar{16}_H$,而对于$120_H$,它被假定为反对称的。我们讨论了质量矩阵必须满足的条件,以便模型能够再现三-双最大混合模式。

英文摘要:

An $SO(10)$ model where the $10_H$ and $120_H$ representations are used for generating fermion masses is quite predictive, though due to the absence of $SU(2)_{L,R}$ triplet/singlet fields it cannot give rise to neutrino masses through the usual type-I or type-II seesaw mechanisms. In this paper for neutrino masses we propose an extension of such an $SO(10)$ model by adding fermions in the adjoint representation (${45}_F$) and a symmetry breaking scalar $\bar{16}_H$. The $\bar{16}_H$ couples the adjoint fermions to the standard fermions in ${16}_F$ and induces neutrino masses through the `double seesaw' mechanism. In order to enhance the predictivity of the model we impose $μ-τ$ flavour symmetry on the Yukawa matrices for $10_H$ and $\bar{16}_H$ whereas for the $120_H$ it is assumed to be antisymmetric. We discuss the conditions that the mass matrices must obey so that the model can reproduce the tri-bimaximal mixing pattern.

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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