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arXiv 1107.3020hep-phhep-ex
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超对称大统一理论中的B_s --> mu+mu-

B_s --> mu+mu- in Supersymmetric Grand Unified Theories

Bhaskar Dutta, Yukihiro Mimura, Yudi Santoso

摘要:

我们研究了最近对Br(B_s --> mu+mu-)的CDF测量,它显示了超过标准模型的结果.我们考虑最小超引力激发模型(mSUGRA)/CMSSM和大统一模型SU(5)和SO(10)。在大统一模型中,中微子混合通过夸克-轻子统一提供了一个额外的夸克味破坏源。在最小SU(5)模型的背景下,我们发现新的CDF测量对大CP相的τ--> μ γ的分支比施加了一个下界.回想一下,在B_s混合中,从B_s --> J/psi phi(Tevatron和LHCb)和双μ子不对称性(D 0)来看,有迹象表明存在大CP相。我们还预测了Br(tau--> mu eta)的值的可能范围。

英文摘要:

We investigate the recent CDF measurement of the Br(B_s --> mu+mu-) which shows excess over the Standard Model. We consider minimal supergravity motivated models (mSUGRA)/CMSSM and grand unified models, SU(5) and SO(10). In the grand unified models, the neutrino mixings provide an additional source of squark flavor violation through the quark-lepton unification. In the context of minimal SU(5) model, we find that the new CDF measurement has imposed a lower bound on the branching ratio of tau --> mu gamma for a large CP phase in the B_s-bar B_s mixing. Recall that there have been indication for a large CP phase in B_s mixing from B_s --> J/psi phi (Tevatron and LHCb) and dimuon asymmetry (D0). We also predict Br(tau --> mu eta) for the possible range of values of Br(tau --> mu gamma).

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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