Contact interactions probe effective dark-matter models at the LHC
Contact interactions probe effective dark-matter models at the LHC
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DOI：
10.1209/0295-5075/102/51001
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
H. Dreiner;D. Schmeier;J. Tattersall
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文献类型：
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作者：
H. Dreiner;D. Schmeier;J. Tattersall
有效场论为探索可能的暗物质(DM)模型提供了一个简单的框架，方法是将完整的相互作用重新参数化为参数空间中具有较小维度的较少数量的算符。在许多情况下，这些模型有四个粒子顶点，例如，导致在强子对撞机上从初始态夸克Q产生暗物质粒子χ的对。在这种分析中，我们证明了对于许多具有S通道DM耦合到对的基本DM模型，这些有效顶点也必然产生形式的夸克接触相互作用(CI)。各自的有效耦合由共同的基本理论联系在一起，该理论允许将上限从一种耦合转换为另一种耦合。我们发现，在大型强子对撞机上，夸克接触相互作用的实验极限给出了比暗物质对产生的实验研究更强的DM耦合的平移极限。
Effective field theories provide a simple framework for probing possible dark-matter (DM) models by re-parametrising full interactions into a reduced number of operators with smaller dimensionality in parameter space. In many cases these models have four particle vertices, e.g., , leading to the pair production of dark-matter particles, χ, at a hadron collider from initial state quarks, q. In this analysis we show that for many fundamental DM models with s-channel DM couplings to pairs, these effective vertices must also produce quark contact interactions (CI) of the form . The respective effective couplings are related by the common underlying theory which allows one to translate the upper limits from one coupling to the other. We show that at the LHC, the experimental limits on quark contact interactions give stronger translated limits on the DM coupling than the experimental searches for dark-matter pair production.