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arXiv 0811.1029hep-phastro-ph.HE
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TeV尺度单线态暗物质

TeV Scale Singlet Dark Matter

Eduardo Ponton, Lisa Randall

摘要:

众所周知,稳定的弱尺度粒子是可行的暗物质候选者,因为湮灭截面自然地大约是正确的大小,以留下正确的热残余丰度。许多暗物质的研究都集中在相对较轻的暗物质上,这与标准模型的弱耦合一致。然而,在强耦合理论中,或者即使耦合只是标准模型耦合的几倍,暗物质也可以具有TeV尺度的质量和正确的热遗迹丰度。在这里,我们考虑中性TeV质量标量暗物质,其必要的相互作用,和潜在的信号。我们认为信号与和没有高维运营商产生的强耦合在TeV规模,可能会发生,例如在RS的情况下。我们发现一些潜在的高能量光子的检测取决于暗物质分布。在较低能量的正电子中检测,例如那些PAMELA探测器,将是困难的,尽管较高能量的正电子信号原则上可以在背景上检测到。然而,具有与TeV截止值一致的高维相互作用的轻暗物质粒子原则上可以匹配PAMELA数据。

英文摘要:

It is well known that stable weak scale particles are viable dark matter candidates since the annihilation cross section is naturally about the right magnitude to leave the correct thermal residual abundance. Many dark matter searches have focused on relatively light dark matter consistent with weak couplings to the Standard Model. However, in a strongly coupled theory, or even if the coupling is just a few times bigger than the Standard Model couplings, dark matter can have TeV-scale mass with the correct thermal relic abundance. Here we consider neutral TeV-mass scalar dark matter, its necessary interactions, and potential signals. We consider signals both with and without higher-dimension operators generated by strong coupling at the TeV scale, as might happen for example in an RS scenario. We find some potential for detection in high energy photons that depends on the dark matter distribution. Detection in positrons at lower energies, such as those PAMELA probes, would be difficult though a higher energy positron signal could in principle be detectable over background. However, a light dark matter particle with higher-dimensional interactions consistent with a TeV cutoff can in principle match PAMELA data.

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