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arXiv 1104.0228hep-ph
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电弱相互作用暗物质的直接探测

Direct Detection of Electroweak-Interacting Dark Matter

Junji Hisano, Koji Ishiwata, Natsumi Nagata, Tomohiro Takesako

摘要:

假设SU(2)L规范多重态中最轻的中性成分是宇宙中暗物质的主要成分,计算了暗物质与核子的弹性散射截面,这是直接探测实验的重要量。当暗物质是实标量或只有电弱规范相互作用的Majorana费米子时,与夸克和胶子的散射分别通过单圈和双圈量子过程诱导,并且它们对弹性散射截面的贡献相当.我们评估了所有的贡献在领先的顺序,发现有一个偶然的取消。结果发现自旋无关的截面为O(10^-(46-48))cm ^2,远低于目前的实验界限。

英文摘要:

Assuming that the lightest neutral component in an SU(2)L gauge multiplet is the main ingredient of dark matter in the universe, we calculate the elastic scattering cross section of the dark matter with nucleon, which is an important quantity for the direct detection experiments. When the dark matter is a real scalar or a Majorana fermion which has only electroweak gauge interactions, the scattering with quarks and gluon are induced through one- and two-loop quantum processes, respectively, and both of them give rise to comparable contributions to the elastic scattering cross section. We evaluate all of the contributions at the leading order and find that there is an accidental cancellation among them. As a result, the spin-independent cross section is found to be O(10^-(46-48)) cm^2, which is far below the current experimental bounds.

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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