Dark Matter, Muon g-2 and Other SUSY Constraints
Dark Matter, Muon g-2 and Other SUSY Constraints
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暗物质、Muon g-2 和其他 SUSY 约束
DOI：
10.1007/978-3-642-18534-2_2
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
B. Hu
中科院分区：
文献类型：
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作者：
R. Arnowitt;B. Dutta;B. Hu
在Sugra GUT模型的框架内，回顾了约束SUSY参数空间的最新进展。WMAP的数据被认为将冷暗物质密度的误差减少了大约四倍，这意味着当m0，m1/2和lt；1TeV时，最轻的STAU只比最轻的中性微子重5-10GeV。Cmd-2对他们的数据进行了重新分析，将标准模型预测和布鲁克海文测量的介子磁矩之间的不一致缩小到了1.9σ，而使用tau衰变数据加上CVC，不一致为0.7σ。(然而，两组数据在2.9σ的水平上仍然不一致。)讨论了BELLE和BABA最近对b→φkcp破坏参数和分支比的测量。在BBNS改进的因式分解方法下对它们进行了理论分析。在2.7σ的水平上，CP参数与标准模型不一致，在大部分参数空间内，分支比低2倍或更多。结果表明，这两种反常现象都可以通过在混合第二代和第三代的MG处增加一个非通用的立方软破缺项来解释。
Recent developments constraining the SUSY parameter space are reviewed within the framework of SUGRA GUT models. The WMAP data is seen to reduce the error in the density of cold dark matter by about a factor of four, implying that the lightest stau is only 5–10 GeV heavier than the lightest neutralino whenm0,m1/2< 1 TeV. The CMD-2 re-analysis of their data has reduced the disagreement between the Standard Model prediction and the Brookhaven measurement of the muon magnetic moment to 1.9 σ, while using the tau decay data plus CVC, the disagreement is 0.7 σ.(However, the two sets of data remain inconsistent at the 2.9 σ level.) The recent Belle and BABAR measurements of theB→ φKCP violating parameters and branching ratios are discussed. They are analyzed theoretically within the BBNS improved factorization method. The CP parameters are in disagreement with the Standard Model at the 2.7 σ level, and the branching ratios are low by a factor of two or more over most of the parameter space. It is shown that both anomalies can naturally be accounted for by adding a non-universal cubic soft breaking term atMGmixing the second and third generations.