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arXiv 2107.13845hep-ph
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产生和约束自相互作用的隐藏扇区暗物质

Producing and constraining self-interacting hidden sector dark matter

Laurent Vanderheyden

摘要:

在这篇论文中,我们首先回顾了所有的限制适用于自相互作用DM与光介质考虑著名的希格斯门和动力学混合门模型作为具体的例子。然后,我们详细介绍了索末菲效应,并研究了它对具有光介体的自相互作用DM模型的许多影响。接下来,我们研究如何占DM遗迹丰度在这样的门户网站模型,提出了一个通用的结构与三个人口(标准模型,DM和介质粒子)相互连接,通过三个相互作用产生的两个耦合强度。这似乎可以通过五种不同的动力学方式来实现,这些方式产生了九种制度,其中四种是新的。这些新的生产制度是相关的情况下,隐藏的扇区粒子没有热连接到可见的矢量粒子。我们进一步研究了一个热断开的隐藏扇区的可能性,并建立了一般允许的参数空间DM热候选人在隐藏-可见的温度比与DM质量平面。我们表明,在这个框架中,简单的门户模型,如我们认为可以缓解紧张局势,在小规模,同时提供合适的DM候选人。其他最小的自我互动DM与光介体框架,始终满足所有的限制,也提出和探讨。

英文摘要:

In this thesis, we start by reviewing all constraints applying on self-interacting DM with a light mediator considering well-known Higgs portal and Kinetic Mixing portal models as concrete examples. Then, we elaborate on the Sommerfeld effect, and we study its many implications on self-interacting DM models with light mediator. Next, we investigate how to account for the DM relic abundance in such portal models which present a generic structure with three populations (Standard Model, DM and mediator particles) connected to each other through three interactions resulting from two coupling strengths. It appears that this can be done through five different dynamical ways which give rise to nine regimes among which four are new. Those new production regimes are relevant for a situation where the hidden sector particles are not thermally connected to the visible vector particles. We further study the possibility of a thermally disconnected Hidden Sector and establish the general allowed parameter space for DM thermal candidates in the hidden-to-visible temperature ratio versus DM mass plane. We show that, in this framework, simple portal models such as the two we consider can alleviate tensions at small scale while offering suitable DM candidates. Other minimal self-interacting DM with light mediator frameworks which consistently fulfil all constraints are also proposed and explored.

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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