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arXiv 1107.3535hep-phhep-ex
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在LHC的CDF $B^0_s \to μ^{+} μ^{-}$和SUSY中观察到过量

Excess Observed in CDF $B^0_s \to μ^{+} μ^{-}$ and SUSY at the LHC

Sujeet Akula, Daniel Feldman, Pran Nath, Gregory Peim

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发表信息：
Phys.Rev.D84:115011,2011
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摘要：

CDF最近在$B^0_s \to μ^{+} μ^{-}$中观察到的过量解释为可能的超对称起源。本文分析了在LHC-7和165 pb $^{-1}$积分亮度的联合约束下，在XENON-100对中性子-质子自旋无关截面的新限制下，以及在CDF $B^0_s \to μ^{+} μ^{-}$ 90% C. L约束下，mSUGRA和非普适SUGRA模型的参数空间。据报道，极限是由过多的双μ子事件引起的。结果表明，与所有约束条件一致的分支比预测值$B^0_s \to μ^{+} μ^{-}$包含以下NLSP：chargino、stau、stop或CP奇（偶）Higgs.给出了超微粒子的下界，包括LHC、XENON和CDF $B^0_s\to μ^+μ^-$约束的超微粒子的下界，以及由于CDF结果的额外约束而引起的超微粒子质量允许范围的变化.指出双面CDF 90% C.L. limit是超粒子质量的上限。对应于$B^0_s \to μ^{+} μ^{-}$中的信号区域，执行在LHC处用于早期发现的可能签名的分析。GUT尺度的非普适性的影响，在高吉诺和希格斯部门进行了讨论。如果CDF协作组所看到的过量得到LHCb或D 0的进一步数据的支持，那么这个新结果可能是发现超对称性的预兆。

英文摘要：

The recent excess observed by CDF in $B^0_s \to μ^{+} μ^{-}$ is interpreted in terms of a possible supersymmetric origin. An analysis is given of the parameter space of mSUGRA and non-universal SUGRA models under the combined constraints from LHC-7 with 165 pb$^{-1}$ of integrated luminosity, under the new XENON-100 limits on the neutralino-proton spin independent cross section and under the CDF $B^0_s \to μ^{+} μ^{-}$ 90% C.L. limit reported to arise from an excess number of dimuon events. It is found that the predicted value of the branching ratio $B^0_s \to μ^{+} μ^{-}$ consistent with all the constraints contains the following set of NLSPs: chargino, stau, stop or CP odd (even) Higgs. The lower bounds of sparticles, including those from the LHC, XENON and CDF $B^0_s\to μ^+μ^-$ constraint, are exhibited and the shift in the allowed range of sparticle masses arising solely due to the extra constraint from the CDF result is given. It is pointed out that the two sided CDF 90% C.L. limit puts upper bounds on sparticle masses. An analysis of possible signatures for early discovery at the LHC is carried out corresponding to the signal region in $B^0_s \to μ^{+} μ^{-}$. Implications of GUT-scale non-universalities in the gaugino and Higgs sectors are discussed. If the excess seen by the CDF Collaboration is supported by further data from LHCb or D0, this new result could be a harbinger for the discovery of supersymmetry.

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