Calorimetric Dark Matter Detection with Galactic Center Gas Clouds

被引：50

作者：

Bhoonah, Amit ^{[1
,2
,3
]}

Bramante, Joseph ^{[1
,2
,4
]}

Elahi, Fatemeh ^{[5
]}

Schon, Sarah ^{[1
,2
,4
]}

机构：

[1] Queens Univ, McDonald Inst, Kingston, ON K7L 2S8, Canada

[2] Queens Univ, Dept Phys Engn Phys & Astron, Kingston, ON K7L 2S8, Canada

[3] Swiss Fed Inst Technol, Ramistr 101, CH-8092 Zurich, Switzerland

[4] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

[5] Inst Res Fundamental Sci IPM, Sch Particles & Accelerators, Tehran, Iran

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 13期

基金：

加拿大自然科学与工程研究理事会;

关键词：

MILLICHARGED PARTICLES; SEARCH; WINDOW; LIMITS;

D O I：

10.1103/PhysRevLett.121.131101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that dark matter heating of gas clouds, hundreds of parsecs from the Milky Way Galactic Center, provides a powerful new test of dark matter interactions. To illustrate, we set a new bound on nucleon scattering for 10-100 MeV mass dark matter. We also constrain millicharged dark matter models, including those proposed to match the recent EDGES 21 cm absorption anomaly. For Galactic Center gas clouds, the Galactic fields' magnetic deflection of electromagnetically charged dark matter is mitigated, because the magnetic fields around the Galactic Center are poloidal, as opposed to being aligned parallel to the Milky Way disk. We discuss prospects for detecting dark matter using a population of Galactic Center gas clouds warmed by dark matter.

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