arXiv 1801.091152018-01hep-ph

双组分FIMP暗物质的极小模型：基本搜索

A Minimal Model For Two-Component FIMP Dark Matter: A Basic Search

S. Peyman Zakeri, S. Mohammad Moosavi Nejad, Mohammadreza Zakeri, S. Yaser Ayazi

备注：: 30 pages, 4 igures
发表信息：: Chinese Physics C,Vol. 42, No. 7 (2018) 073101
DOI：: 10.1088/1674-1137/42/7/073101

摘要：

在暗物质现象学的多分量配置中，我们提出了一个最小的两分量配置，它是标准模型的扩展，只有三个新的领域;一个标量和一个费米子通过希格斯门与热汤相互作用，由另一个标量介导的方式，暗物质候选者的稳定性同时由一个明确的$Z_2$对称性。针对最常见的冻结框架，我们寻找暗物质粒子签名冻结的情况下，通过评估的遗迹密度和检测信号。该模型的一个简单的显着特点是缺乏暗物质转换，所以暗物质成分单独作用，模型可以完全适应单重标量和单重费米子模型，分别。我们发现暗物质自相互作用是探测这种微弱模型的最有前途的方法。虽然标量分量满足这一约束，但费米子分量甚至在共振区也拒绝这一约束。

英文摘要：

In the multi-component configurations of dark matter phenomenology, we propose a minimal two-component configuration which is an extension of the Standard Model with only three new fields; one scalar and one fermion interact with the thermal soup through Higgs portal, mediated by the other scalar in such a way that the stabilities of dark matter candidates are made simultaneously by an explicit $Z_2$ symmetry. Against the most common freeze-out framework, we look for dark matter particle signatures in the freeze-in scenario by evaluating the relic density and detection signals. A simple distinguishing feature of the model is the lack of dark matter conversion, so the dark matter components act individually and the model can be adapted entirely to both singlet scalar and singlet fermionic models, separately. We find dark matter self-interaction as the most promising approach to probe such feeble models. Although the scalar component satisfies this constraint, the fermionic one refuses it even in the resonant region.

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英文摘要：

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