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arXiv 1202.5231hep-ph
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暗物质和Higgs三重态模型中中微子质量的抑制机制

Dark matter and a suppression mechanism for neutrino masses in the Higgs triplet model

Shinya Kanemura, Hiroaki Sugiyama

摘要:

我们扩展了希格斯三重态模型,以便包括暗物质候选者和一个简单的抑制机制的真空期望值(v_Delta)的三重态标量场。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和实单重态s_2^0)和Z_2-偶复单重态s_1^0(其真空期望值违反轻子数守恒一个单位)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奇标量玻色子可能是暗物质的候选者。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。

英文摘要:

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.

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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