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arXiv 1204.4183hep-phhep-ex
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在LHC分辨动力学暗物质

Distinguishing Dynamical Dark Matter at the LHC

Keith R. Dienes, Shufang Su, Brooks Thomas

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17 pages, LaTeX, 10 figures
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摘要：

动态暗物质（DDM）是暗物质物理学的一个新框架，其中暗扇区由单个分量场的集合组成，这些分量场集体合谋以超越通常与暗物质相关的方式起作用。由于其非平凡的结构，这种DDM系综--不像大多数传统的暗物质候选者-不能用单一的质量，衰变宽度或散射截面集来表征，而是必须用描述其成分的集体行为的参数来描述。同样地，这样一个系综的组成部分也不需要是稳定的，只要整个系综的寿命与宇宙学丰度相平衡即可。在本文中，我们调查的前景，确定DDM合奏在大型强子对撞机和区分这样的暗物质候选人的候选人的特征，传统的暗物质模型。特别是，我们专注于DDM的情况下，在碰撞机产生的合奏的分量字段旁边的一些标准模型粒子通过额外的重场衰变。这些标准模型粒子的不变质量分布具有几个独特的特征，这些特征在大多数传统的暗物质模型中无法复制。我们证明，在许多情况下，它是可能的DDM合奏和传统的暗物质候选人的基础上，这样的分布区分。此外，我们的许多结果也适用于更普遍的各种其他扩展的标准模型，涉及多个稳定或亚稳中性粒子。

英文摘要：

Dynamical dark matter (DDM) is a new framework for dark-matter physics in which the dark sector comprises an ensemble of individual component fields which collectively conspire to act in ways that transcend those normally associated with dark matter. Because of its non-trivial structure, this DDM ensemble --- unlike most traditional dark-matter candidates --- cannot be characterized in terms of a single mass, decay width, or set of scattering cross-sections, but must instead be described by parameters which describe the collective behavior of its constituents. Likewise, the components of such an ensemble need not be stable so long as lifetimes are balanced against cosmological abundances across the ensemble as a whole. In this paper, we investigate the prospects for identifying a DDM ensemble at the LHC and for distinguishing such a dark-matter candidate from the candidates characteristic of traditional dark-matter models. In particular, we focus on DDM scenarios in which the component fields of the ensemble are produced at colliders alongside some number of Standard-Model particles via the decays of additional heavy fields. The invariant-mass distributions of these Standard-Model particles turn out to possess several unique features that cannot be replicated in most traditional dark-matter models. We demonstrate that in many situations it is possible to differentiate between a DDM ensemble and a traditional dark-matter candidate on the basis of such distributions. Moreover, many of our results also apply more generally to a variety of other extensions of the Standard Model which involve multiple stable or metastable neutral particles.

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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