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arXiv 0909.4919hep-phastro-ph.COhep-ex
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$Υ$衰变为轻标量暗物质

$Υ$ Decays into Light Scalar Dark Matter

Gagik K. Yeghiyan

摘要:

假设暗物质是由于重自由度的交换而产生的,我们研究了自旋为1的底鎓衰变为一对轻标量暗物质(DM)粒子。我们进行了独立于模型的分析,并推导出这些衰变的分支比的公式。我们将计算结果与实验数据进行了比较。我们表明,所考虑的分支比是在目前的BaBaR实验灵敏度的范围内。因此,暗物质的生产在Upperdum衰变导致约束的各种模型的参数包含一个轻自旋0 DM粒子。我们说明了这一点的模型与“WIMP无奇迹”,特别是规范介导的超对称性打破的情况下,与自旋0 DM粒子在隐藏的部门。考虑的另一个例子是具有标量DM粒子的II型2HDM。

英文摘要:

We examine decays of a spin-1 bottomonium into a pair of light scalar Dark Matter (DM) particles, assuming that Dark Matter is produced due to exchange of heavy degrees of freedom. We perform a model-independent analysis and derive formulae for the branching ratios of these decays. We confront our calculation results with the experimental data. We show that the considered branching ratios are within the reach of the present BaBaR experimental sensitivity. Thus, Dark Matter production in Upsilon decays leads to constraints on parameters of various models containing a light spin-0 DM particle. We illustrate this for the models with a "WIMPless miracle", in particular for a Gauge Mediated SUSY breaking scenario, with a spin-0 DM particle in the hidden sector. Another example considered is the type II 2HDM with a scalar DM particle.

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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