Direct detection of dark matter in universal bound states

被引：56

作者：

Laha, Ranjan ^{[1
,2
]}

Braaten, Eric ^{[2
]}

机构：

[1] Ohio State Univ, CCAPP, Columbus, OH 43210 USA

[2] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.89.103510

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the signatures for internal structure of dark matter in direct detection experiments in the context of asymmetric self-interacting dark matter. The self-interaction cross section of two dark matter particles at low energies is assumed to come close to saturating the S-wave unitarity bound, which requires the presence of a resonance near their scattering threshold. The universality of S-wave near-threshold resonances then implies that the low-energy scattering properties of a two-body bound state of dark matter particles are completely determined by its binding energy, irrespective of the underlying microphysics. The form factor for elastic scattering of the bound state from a nucleus and the possibility of break up of the bound state produce new signatures in the nuclear recoil energy spectrum. If these features are observed in experiments, it will give a smoking-gun signature for the internal structure of dark matter.

引用

页数：13

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