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arXiv 1005.3797hep-phastro-ph.HEhep-ex
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处于暗物质直接探测前沿的Tevatron

The Tevatron at the Frontier of Dark Matter Direct Detection

Yang Bai, Patrick J. Fox, Roni Harnik

摘要:

直接探测暗物质(DM)需要暗物质粒子与核子的相互作用。同样的相互作用可以导致在强子对撞机上产生暗物质对,加上初始态辐射,这可能导致单喷流信号。因此,Tevatron的单射流搜索可能会限制DM的直接检测率。我们研究这些界限的情况下,有DM和标准模型之间的接触相互作用,并有一个调解人在Tevatron运动学访问。我们发现,在许多情况下,Tevatron提供了目前最好的限制,特别是对于轻暗物质,低于5 GeV,和自旋相关的相互作用。非标准的暗物质候选者也受到限制。光介体的引入显著地削弱了对撞机束缚。因此,与单喷流限制明显冲突的直接探测发现将指向将标准模型耦合到暗区的新的亮态。单喷流搜索具有更高的亮度,并包括在分析中的频谱形状可以改善DM-核子散射截面的约束。

英文摘要:

Direct detection of dark matter (DM) requires an interaction of dark matter particles with nucleons. The same interaction can lead to dark matter pair production at a hadron collider, and with the addition of initial state radiation this may lead to mono-jet signals. Mono-jet searches at the Tevatron can thus place limits on DM direct detection rates. We study these bounds both in the case where there is a contact interaction between DM and the standard model and where there is a mediator kinematically accessible at the Tevatron. We find that in many cases the Tevatron provides the current best limit, particularly for light dark matter, below 5 GeV, and for spin dependent interactions. Non-standard dark matter candidates are also constrained. The introduction of a light mediator significantly weakens the collider bound. A direct detection discovery that is in apparent conflict with mono-jet limits will thus point to a new light state coupling the standard model to the dark sector. Mono-jet searches with more luminosity and including the spectrum shape in the analysis can improve the constraints on DM-nucleon scattering cross section.

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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