Can annihilating dark matter be lighter than a few GeVs?

被引：131

作者：

Boehm, C ^{[1
]}

Ensslin, TA

Silk, J

机构：

[1] Univ Oxford, Dept Astrophys, Denys Wilkinson Lab, Oxford OX1 3RH, England

[2] Max Planck Inst Astrophys, D-85741 Garching, Germany

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2004年 / 30卷 / 03期

关键词：

D O I：

10.1088/0954-3899/30/3/004

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We estimate the gamma-ray fluxes from the residual annihilations of dark matter (DM) particles having a mass m(dm) is an element of [MeV, O(10) GeV] (a possible solution to the DM issue provided they have a new kind of interactions and no significant coupling to the Z) and compare them to observations. We find that particles lighter than O(100 MeV) can be viable DM candidates provided their dominant annihilation cross section is S-wave suppressed so as to satisfy the gamma-ray constraints. A similar conclusion is obtained for particles lighter than O(10) GeV from the study of radio fluxes, assuming a NFW profile and that they mainly annihilate into electrons.

引用

页码：279 / 285

页数：7

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