复合希格斯玻色子模型中的复合暗物质
Composite dark matter from a model with composite Higgs boson
摘要：
在以前的文件\cite{Khlopov:2007ic}，我们展示了如何最小步行人工色模型（WTC）可以提供一个复合暗物质的候选人，通过形成一个-2带电techniparticle和$^4He^{++}$之间的束缚态。我们研究了这些\emph{techni-O-helium} $tOHe$“原子”的性质，它们的行为与较暖的暗物质相比，并不冷。在本文中，我们扩展我们的工作在几个不同的方面。我们研究了一种混合的情况下，$tOHe$和束缚态之间的+2和-2带电technicparticles共存的暗物质密度的可能性。我们认为，这些新提出的束缚态完全由技术粒子，虽然他们表现为弱相互作用大质量粒子（WIMPs），由于其大的弹性截面与核，只能占一小部分的暗物质密度。因此，我们得出结论，在最小的WTC，复合暗物质应主要由$tOHe$。此外，如果技术粒子构成了暗物质密度，则在它们的质量中加入了宇宙学界限。最后，我们建议在此设置，DAMA/NaI和DAMA/LIBRA的结果和CDMS和其他直接的暗物质搜索，意味着核反冲测量，这应该伴随电离的负面结果之间的差异的可能解释。
英文摘要：
In a previous paper \cite{Khlopov:2007ic}, we showed how the minimal walking technicolor model (WTC) can provide a composite dark matter candidate, by forming bound states between a -2 electrically charged techniparticle and a $^4He^{++}$. We studied the properties of these \emph{techni-O-helium} $tOHe$ "atoms", which behave as warmer dark matter rather than cold. In this paper we extend our work on several different aspects. We study the possibility of a mixed scenario where both $tOHe$ and bound states between +2 and -2 electrically charged techniparticles coexist in the dark matter density. We argue that these newly proposed bound states solely made of techniparticles, although they behave as Weakly Interacting Massive Particles (WIMPs), due to their large elastic cross section with nuclei, can only account for a small percentage of the dark matter density. Therefore we conclude that within the minimal WTC, composite dark matter should be mostly composed of $tOHe$. Moreover in this paper, we put cosmological bounds in the masses of the techniparticles, if they compose the dark matter density. Finally we propose within this setup, a possible explanation of the discrepancy between the DAMA/NaI and DAMA/LIBRA findings and the negative results of CDMS and other direct dark matter searches that imply nuclear recoil measurement, which should accompany ionization.
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