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arXiv 0903.3596hep-ph
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$μν$ SSM的LHC现象学

LHC phenomenology of the $μν$SSM

A. Bartl, M. Hirsch, S. Liebler, W. Porod, A. Vicente

摘要:

$μν$ SSM已被提出来同时解决MSSM的$μ$ -问题和解释当前的中微子数据。该模型打破了轻子数和R宇称。在本文中,我们研究这一建议的唯象集中在中微子质量和最轻的超对称粒子(LSP)的衰变。首先,我们详细研究了具有一代单态的$μν$ SSM,一旦考虑1圈修正,它可以解释所有的中微子数据。然后,我们研究了具有更多单态的模型的变化,它可以在树水平上产生所有的中微子质量和混合。我们计算最轻的超对称粒子的衰变性质,假设是最轻的中性伴子,考虑到所有可能的最终状态。在LHC探测器内LSP衰减的参数区域,但其长度足以显示位移顶点。某些末态的衰变分支比显示出与测得的中微子角的特征相关性,从而可以在大型强子对撞机上测试该模型。最后,我们简要地讨论可能的签名,它允许区分不同的R-宇称破缺模型。

英文摘要:

The $μν$SSM has been proposed to solve simultaneously the $μ$-problem of the MSSM and explain current neutrino data. The model breaks lepton number as well as R-parity. In this paper we study the phenomenology of this proposal concentrating on neutrino masses and the decay of the lightest supersymmetric particle (LSP). At first we investigate in detail the $μν$SSM with one generation of singlets, which can explain all neutrino data, once 1-loop corrections are taken into account. Then we study variations of the model with more singlets, which can generate all neutrino masses and mixings at tree-level. We calculate the decay properties of the lightest supersymmetric particle, assumed to be the lightest neutralino, taking into account all possible final states. The parameter regions where the LSP decays within the LHC detectors but with a length large enough to show a displaced vertex are identified. Decay branching ratios of certain final states show characteristic correlations with the measured neutrino angles, allowing to test the model at the LHC. Finally we briefly discuss possible signatures, which allow to distinguish between different R-parity breaking models.

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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