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arXiv 1408.0754hep-ph
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Flavonge规范介导中的轻子味破坏

Lepton Flavor Violation in Flavored Gauge Mediation

Lorenzo Calibbi, Paride Paradisi, Robert Ziegler

摘要:

我们研究了Flavon-Gauge Mediation(FGM)背景下轻子味破坏(LFV)的解剖和现象学。在FGM中,信使部门直接耦合到MSSM物质场,耦合由解释SM Yukawas中的层次结构的相同动力学控制。尽管味道违反的模式取决于特定的底层味道模型,但FGM提供了类似于波函数重整或超对称部分复合的内置味道抑制。此外,与这些模型相比,第三代Yukawas对左右(LR)风味转换有额外的抑制作用,特别是对风味盲期提供了额外的保护。我们利用轻子味现象学的这种设置的后果,假设新的耦合是由简单的U(1)味模型,已提出,以适应大中微子混合角控制。值得注意的是,事实证明,在FGM的背景下,这些模型可以通过令人印象深刻的限制LFV过程和轻子EDM即使是轻超伙伴,因此提供了解决长期存在的μ子g-2异常的可能性。

英文摘要:

We study the anatomy and phenomenology of Lepton Flavor Violation (LFV) in the context of Flavored Gauge Mediation (FGM). Within FGM, the messenger sector couples directly to the MSSM matter fields with couplings controlled by the same dynamics that explains the hierarchies in the SM Yukawas. Although the pattern of flavor violation depends on the particular underlying flavor model, FGM provides a built-in flavor suppression similar to wave function renormalization or SUSY Partial Compositeness. Moreover, in contrast to these models, there is an additional suppression of left-right (LR) flavor transitions by third-generation Yukawas that in particular provides an extra protection against flavor-blind phases. We exploit the consequences of this setup for lepton flavor phenomenology, assuming that the new couplings are controlled by simple U(1) flavor models that have been proposed to accommodate large neutrino mixing angles. Remarkably, it turns out that in the context of FGM these models can pass the impressive constraints from LFV processes and leptonic EDMs even for light superpartners, therefore offering the possibility of resolving the longstanding muon g-2 anomaly.

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