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arXiv 0812.0084hep-ph
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中微子质量和混合,最轻的中性伴子衰变和超对称性中$μ$问题的解

Neutrino masses and mixing, lightest neutralino decays and a solution to the $μ$ problem in supersymmetry

Pradipta Ghosh, Sourov Roy

摘要:

本文详细研究了具有三个规范单重态中微子和R宇称破坏的最小超对称标准模型的扩展模型中的中微子质量和混合模式。规范单重态中微子的马约拉纳质量以及希格斯超场通常的$μ$ -项是通过单重态中微子的真空期望值在电弱标度下产生的。由此产生的有效质量矩阵的三个轻中微子有贡献的跷跷板机制涉及的单重态中微子,以及由于与重中性中微子的混合。该模型在文献中通常称为“来自$ν$超对称标准模型的$μ$“($μν$ SSM)。我们表明,即使与味对角中微子汤川耦合,全球数据的三味中微子可以很好地占在这种情况下,在树的水平。我们还分析了在电荷和希格斯扇区的混合,并计算了最轻的超对称粒子的衰变。衰变分支比与中微子混合角有一定的相关性,这可以在大型强子对撞机上进行测试。这种模型的其他一些唯象的影响进行了讨论。

英文摘要:

We examine in detail the neutrino masses and mixing patterns in an extension of the minimal supersymmetric standard model with three gauge-singlet neutrinos and R-parity violation. The Majorana masses for the gauge-singlet neutrinos as well as the usual $μ$-term for the Higgs superfields are generated at the electroweak scale through the vacuum expectation values of the singlet sneutrinos. The resulting effective mass matrix for the three light neutrinos have contributions from the seesaw mechanism involving the singlet neutrinos as well as due to the mixing with the heavy neutralinos. This model is popularly known in the literature as the "$μ$ from $ν$ supersymmetric standard model" ($μν$SSM). We show that even with flavour diagonal neutrino Yukawa couplings, the global data on three-flavour neutrinos can be well accounted for in this scenario, at the tree level. We also analyze the mixing in the chargino and the Higgs sector and calculate the decays of the lightest supersymmetric particle in this model. The decay branching ratios show certain correlations with the neutrino mixing angles, which can be tested at the LHC. Some other phenomenological implications of such a model have been discussed.

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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