Dark matter and a suppression mechanism for neutrino masses in the Higgs triplet model
Dark matter and a suppression mechanism for neutrino masses in the Higgs triplet model
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DOI：
10.1103/physrevd.86.073006
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发表时间：
2012-02
影响因子：
5
通讯作者：
S. Kanemura;H. Sugiyama
中科院分区：
文献类型：
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作者：
S. Kanemura;H. Sugiyama
我们扩展了希格斯三重态模型，以便包括暗物质的候选人和一个简单的抑制机制的真空期望值（v_Delta）的三重标量场。即使在TeV量级的三重态场中，中微子质量的微小性也可以用v_Delta的抑制值来解释。通过引入Z_2-奇标量（SU（2）_L二重态eta和真实的单重态s_2^0）以及Z_2-偶复单重态标量s_1^0（其真空期望值以一个单位违反轻子数守恒）来扩展Higgs扇区。在我们的模型中，v_Delta由Z_2-奇粒子贡献的单圈图产生。最轻的Z_2奇标量玻色子可以作为暗物质的候选者。我们简要地讨论了我们的模型在大型强子对撞机的特征信号。
We extend the Higgs triplet model so as to include dark matter candidates and a simple suppression mechanism for the vacuum expectation value (v_Delta) of the triplet scalar field. The smallness of neutrino masses can be naturally explained with the suppressed value of v_Delta even when the triplet fields are at the TeV scale. The Higgs sector is extended by introducing Z_2-odd scalars (an SU(2)_L doublet eta and a real singlet s_2^0) in addition to a Z_2-even complex singlet scalar s_1^0 whose vacuum expectation value violates the lepton number conservation by a unit. In our model, v_Delta is generated by the one-loop diagram to which Z_2-odd particles contribute. The lightest Z_2-odd scalar boson can be a candidate for the dark matter. We briefly discuss a characteristic signal of our model at the LHC.