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arXiv 0810.0714hep-ph
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暗物质的SuperUnified理论的LHC信号

LHC Signals for a SuperUnified Theory of Dark Matter

Nima Arkani-Hamed, Neal Weiner

摘要:

一个新的WIMP暗物质理论已经被提出,其直接动机是来自PAMELA和ATIC合作的惊人数据。WIMP被认为是在一个隐藏的规范对称性G_Dark下带电的,在GeV尺度附近破裂;这也为INTEGRAL和DAMA信号的“兴奋”和“非弹性”暗物质解释提供了必要的成分。在这篇简短的笔记中,我们指出了在低能超对称性中最直接嵌入这个简单图像的后果,其中G_Dark在GeV尺度上的破缺通过辐射校正或普朗克抑制算子自然产生。该理论预测,在大型强子对撞机的超对称信号的主要补充。一个完全通用的预测是,G_Dark粒子可以在MSSM超伴子的级联衰变中产生,因为这些级联衰变以MSSM LSP对结束,这些LSP对又衰变成真正的LSP和暗扇区中的其他粒子。反过来,最轻的GeV尺度的暗希格斯玻色子和规范玻色子最终衰变回轻SM态,并主要衰变为轻子。因此,所有超对称事件的很大一部分将包含至少两个“轻子喷流”:n ≥ 2轻子的集合,具有小的角间距和GeV尺度不变的质量。此外,如果暗物质部分在标准模型下直接带电,规范耦合统一的成功意味着新的长寿命有色粒子的存在,这些粒子可以在LHC中大量产生。

英文摘要:

A new theory of WIMP Dark Matter has been proposed, motivated directly by striking Data from the PAMELA and ATIC collaborations. The WIMP is taken to be charged under a hidden gauge symmetry G_Dark, broken near the GeV scale; this also provides the necessary ingredients for the "exciting" and "inelastic" Dark Matter interpretations of the INTEGRAL and DAMA signals. In this short note we point out the consequences of the most straightforward embedding of this simple picture within low-energy SUSY, in which G_Dark breaking at the GeV scale arises naturally through radiative corrections, or Planck-suppressed operators. The theory predicts major additions to SUSY signals at the LHC. A completely generic prediction is that G_Dark particles can be produced in cascade decays of MSSM superpartners, since these end with pairs of MSSM LSP's that in turn decay into the true LSP and other particles in the dark sector. In turn, the lightest GeV-scale dark Higgses and gauge bosons eventually decay back into light SM states, and dominantly into leptons. Therefore, a large fraction of all SUSY events will contain at least two ``lepton jets'': collections of n>= 2 leptons, with small angular separations and GeV scale invariant masses. Furthermore, if the Dark Matter sector is directly charged under the Standard Model, the success of gauge coupling unification implies the presence of new long-lived colored particles that can be copiously produced at the LHC.

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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