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arXiv 1005.4953hep-ph
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微中子质量的微调

Neutrino Masses from Fine Tuning

B. N. Grossmann, Z. Murdock, S. Nandi

摘要:

我们提出了一种产生微小中微子质量的新方法。狄拉克中微子质量矩阵得到了两个新的希格斯二重态的贡献,它们的vevs在电弱(EW)尺度。中微子质量很小,不是因为汤川耦合很小,也不是因为非常重($\sim 10^{14}\textrm{GeV}$)的右手中微子。它们很小,因为狄拉克中微子质量矩阵(微调)的抵消。在对狄拉克中微子质量矩阵进行微调,使其达到$10^{-4}$ GeV量级后,通过与右手中微子在EW量级的跷跷板机制,得到了正确量级的轻中微子质量.该提议将中微子物理学与对撞机物理学联系起来。希格斯粒子的搜索策略完全改变了。对于广泛的希格斯质量,标准模型希格斯主要衰变到$ν_L N_R$模式,产生最终态$\barν ν\bar{b} b$或$\barν ντ^+τ^-$。这可以在LHC上进行测试,也可能在Tevatron上进行测试。

英文摘要:

We present a new approach for generating tiny neutrino masses. The Dirac neutrino mass matrix gets contributions from two new Higgs doublets with their vevs at the electroweak (EW) scale. Neutrino masses are tiny not because of tiny Yukawa couplings, or very heavy ($\sim 10^{14}\textrm{GeV}$) right handed neutrinos. They are tiny because of a cancelation in the Dirac neutrino mass matrix (fine tuning). After fine tuning to make the Dirac neutrino mass matrix at the $10^{-4}$ GeV scale, light neutrino masses are obtained in the correct scale via the see-saw mechanism with the right handed neutrino at the EW scale. The proposal links neutrino physics to collider physics. The Higgs search strategy is completely altered. For a wide range of Higgs masses, the Standard Model Higgs decays dominantly to $ν_L N_R$ mode giving rise to the final state $\barν ν\bar{b} b$, or $\barν ντ^+τ^-$. This can be tested at the LHC, and possibly at the Tevatron.

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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