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arXiv 1609.02872hep-ph
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希格斯门暗物质和中微子质量以及与双电荷标量的混合

Higgs portal dark matter and neutrino mass and mixing with a doubly charged scalar

I. M. Hierro, S. F. King, S. Rigolin

摘要:

我们考虑标准模型的一个扩展,其中包含两个TeV尺度的新标量粒子:一个是中性单重标量$ϕ$,最终被确定为暗物质的候选者,另一个是带双电荷的$SU(2)_L$单重标量$S^{++}$,它可能是非零中微子质量和混合的来源。假设标量扇区中存在未破缺的$Z_2$对称性,在这种对称性下,只有附加的中性标量$ϕ$是奇数,我们写出最一般的(可重正化的)标量势。该模型可以被看作是传统的希格斯门暗物质的情况下,也占中微子质量和混合的一个可能的扩展。这个框架不能完全解释观测到的正电子过剩。然而,软化的差异观察到在传统的希格斯门户框架可以得到,特别是当规模的新物理负责产生中微子质量和轻子数违反过程是大约2 TeV。

英文摘要:

We consider an extension of the Standard Model involving two new scalar particles around the TeV scale: a singlet neutral scalar $ϕ$, to be eventually identified as the Dark Matter candidate, plus a doubly charged $SU(2)_L$ singlet scalar, $S^{++}$, that can be the source for the non-vanishing neutrino masses and mixings. Assuming an unbroken $Z_2$ symmetry in the scalar sector, under which only the additional neutral scalar $ϕ$ is odd, we write the most general (renormalizable) scalar potential. The model may be regarded as a possible extension of the conventional Higgs portal Dark Matter scenario which also accounts for neutrino mass and mixing. This framework cannot completely explain the observed positron excess. However a softening of the discrepancy observed in conventional Higgs portal framework can be obtained, especially when the scale of new physics responsible for generating neutrino masses and lepton number violating processes is around 2 TeV.

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