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arXiv 1107.5322hep-phhep-ex
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中微子质量起源的探讨:从GUT到LHC

Probing the Origin of Neutrino Mass: from GUT to LHC

Goran Senjanovic

摘要:

自Majorana经典工作以来,中微子的性质一直是弱相互作用物理的中心问题之一。如果中微子是它自己的反粒子,那么直接的结果就是通过无中微子双β衰变的轻子数破坏。然而,像大型强子对撞机这样的对撞机提供了直接看到同样现象的希望,而且还提供了完成标准模型所需的新粒子的马约拉纳性质。我在这里回顾这些现象的显著特征,然后转向大统一,作为探索相关新物理学规模的一种方式。最小超对称SO(10)理论基本上消除了LHC物理,但自然地导致了大的大气混合角,并在没有任何额外对称性的情况下预言了$θ_{13} \simeq 10^\circ$,与新的T2K和MINOS数据一致。它还保证了R宇称是精确的,从而导致稳定的LSP作为自然的暗物质候选者。另一方面,最小现实SU(5)理论预测轻费米子三重态(低于TeV)是中微子马约拉纳质量的来源。

英文摘要:

Ever since the Majorana classic work, the nature of neutrino has been one of the central questions of the weak interaction physics. If neutrino is its own antiparticle, the immediate consequence is lepton number violation through the neutrinoless double beta decay. However, colliders such as the LHC offer a hope of seeing directly the same phenomenon, and moreover the Majorana nature of new particles needed to complete the Standard Model. I review here the salient features of these phenomena, and then turn to grand unification as a way of probing the scale of the relevant new physics. The minimal supersymmetric SO(10) theory basically eliminates the LHC physics, but leads naturally to the large atmospheric mixing angle and furthermore predicts $θ_{13} \simeq 10^\circ$ without any additional symmetries, in agreement with new T2K and MINOS data. It also assures that the R-parity is exact and thus leads to the stable LSP as a natural Dark Matter candidate. The minimal realistic SU(5) theory, on the other hand, predicts the light fermion triplet, below TeV, as a source of neutrino Majorana mass.

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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