Direct detection of electroweak-interacting dark matter

被引：116

作者：

Hisano, Junji ^{[1
,2
]}

Ishiwata, Koji ^{[3
]}

Nagata, Natsumi ^{[1
,4
]}

Takesako, Tomohiro ^{[5
]}

机构：

[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

[2] Univ Tokyo, Inst Phys & Math Universe, Kashiwa, Chiba 2778568, Japan

[3] CALTECH, Pasadena, CA 91125 USA

[4] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[5] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2011年 / 07期

关键词：

Beyond Standard Model; Cosmology of Theories beyond the SM;

D O I：

10.1007/JHEP07(2011)005

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

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.

引用

页数：20

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