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arXiv 0904.0378hep-ph
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用K和B混合探讨Yukawa统一

Probing Yukawa Unification with K and B Mixing

Stephanie Trine, Susanne Westhoff, Soren Wiesenfeldt

摘要:

我们考虑超对称大统一理论中下夸克和带电轻子汤川耦合统一的修正,它将大的nu_tau-nu_mu混合角与b -> s跃迁联系起来。这些修正一般发生在具有小希格斯表象的简单大统一模型中,并通过相应的右手超伴子的混合来影响s -> d和b -> d跃迁。在一个特定的SUSY-SO(10)模型的基础上,分析了K-Kbar和B-Bbar混合对附加\tilde{d}_R - \tilde{s}_R旋转角θ的约束.我们发现,K_K已经设置了一个严格的界限,θ ^{max}=O(1度),表明一个非常具体的风味结构的校正算子。本文还简要讨论了大中微子混合对幺正三角分析的影响,以及它们解释最近在B_s -> psi phi衰变中观测到的CP破坏相的能力。

英文摘要:

We consider corrections to the unification of down-quark and charged-lepton Yukawa couplings in supersymmetric GUTs, which links the large nu_tau-nu_mu mixing angle to b -> s transitions. These corrections generically occur in simple grand-unified models with small Higgs representations and affect s -> d and b -> d transitions via the mixing of the corresponding right-handed superpartners. On the basis of a specific SUSY-SO(10) model, we analyze the constraints from K-Kbar and B-Bbar mixing on the additional \tilde{d}_R-\tilde{s}_R rotation angle theta. We find that epsilon_K already sets a stringent bound on theta, theta^{max}=O(1 degree), indicating a very specific flavor structure of the correction operators. The impact of the large neutrino mixings on the unitarity triangle analysis is also briefly discussed, as well as their ability to account for the sizeable CP-violating phase observed recently in B_s -> psi phi decays.

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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