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arXiv 0905.2710hep-ph
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LHC上中微子质量产生和三电荷希格斯玻色子的新机制

New Mechanism for Neutrino Mass Generation and Triply Charged Higgs Bosons at the LHC

K. S. Babu, S. Nandi, Zurab Tavartkiladze

摘要:

我们提出了一个产生小质量中微子的新机制,它预言了关系式m_v ~ v^4/M^3,其中v是电弱标度,而不是传统的跷跷板公式m_v ~ v^2/M。这样的质量关系是通过有效维7算符LLHH(H*H)/M^3得到的,当引入一个同位旋3/2希格斯多重态Φ和等三重态轻子时,就会产生这种算符。这些粒子的质量自然是TeV量级的。Φ的中性成员获得感生真空期望值并产生中微子质量,而它的三重电荷伙伴提供了这种情况的确凿证据。这些三重电荷玻色子可以在LHC和Tevatron中成对产生,其中Φ^{+}衰变为W^+l^+l^+或W^+ W ^+W^+,可能顶点发生位移。Φ^{+}的轻子衰变将有助于区分中微子质量的正常和反转层次。这种情况也允许将标准的希格斯玻色子质量提高到超过500 GeV的值。

英文摘要:

We propose a new mechanism for generating small neutrino masses which predicts the relation m_ν~ v^4/M^3, where v is the electroweak scale, rather than the conventional seesaw formula m_ν~ v^2/M. Such a mass relation is obtained via effective dimension seven operators LLHH(H*H)/M^3, which arise when an isospin 3/2 Higgs multiplet Φis introduced along with iso-triplet leptons. The masses of these particles are naturally in the TeV scale. The neutral member of Φacquires an induced vacuum expectation value and generates neutrino masses, while its triply charged partner provides the smoking gun signal of this scenario. These triply charged bosons can be pair produced at the LHC and the Tevatron, with Φ^{+++} decaying into W^+l^+l^+ or W^+W^+W^+, possibly with displaced vertices. The leptonic decays of Φ^{+++} will help discriminate between normal and inverted hierarchies of neutrino masses. This scenario also allows for raising the standard Higgs boson mass to values in excess of 500 GeV.

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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