Non‐perturbative Effect on Thermal Relic Abundance of Dark Matter
Non‐perturbative Effect on Thermal Relic Abundance of Dark Matter
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DOI：
10.1016/j.physletb.2007.01.012
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发表时间：
2006-10
期刊：
影响因子：
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通讯作者：
J. Hisano;S. Matsumoto;M. Nagai;Osamu Saito;Masato Senami
中科院分区：
文献类型：
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作者：
J. Hisano;S. Matsumoto;M. Nagai;Osamu Saito;Masato Senami
我们指出，当暗物质的组成粒子在SU（2）L规范相互作用下是非单线态的，并且比弱规范玻色子重得多时，被称为索末菲增强的非微扰效应强烈地改变了暗物质的热遗迹丰度。这种暗物质粒子的典型候选者是重的类似维诺和希金森的中性伴子。以类维诺中性伴子为例，研究了非微扰效应对暗物质遗迹丰度的影响。我们发现，它的热丰度减少了50%相比，微扰的结果。与观测到的暗物质丰度一致的类维诺中性伴子质量为2.7 TeV·m·3.0 TeV。
We point out that thermal relic abundance of the dark matter is strongly altered by a non-perturbative effect called the Sommerfeld enhancement, when constituent particles of the dark matter are non-singlet under the SU(2)Lgauge interaction and much heavier than the weak gauge bosons. Typical candidates for such dark matter particles are the heavy wino- and higgsino-like neutralinos. We investigate the non-perturbative effect on the relic abundance of dark matter for the wino-like neutralino as an example. We show that its thermal abundance is reduced by 50% compared to the perturbative result. The wino-like neutralino mass consistent with the observed dark matter abundance turns out to be 2.7 TeV≲m≲3.0 TeV.