CMB constraints on dark matter models with large annihilation cross section
CMB constraints on dark matter models with large annihilation cross section
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DOI：
10.1103/physrevd.80.023505
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发表时间：
2009-04
影响因子：
5
通讯作者：
S. Galli;F. Iocco;G. Bertone;A. Melchiorri
中科院分区：
文献类型：
--
作者：
S. Galli;F. Iocco;G. Bertone;A. Melchiorri
在红移{约}1000附近暗物质湮灭产生的二次粒子的注入将不可避免地影响复合过程，在宇宙微波背景（CMB）的各向异性和极化上留下印记。我们表明，WMAP卫星任务提供的最新CMB测量结果对DM自湮灭率提出了有趣的限制，特别是对于那些表现出湮灭截面的大索默菲尔德增强的模型，正如最近提出的那样，以拟合PAMELA和ATIC的结果。此外，我们认为，即将到来的宇宙微波背景实验，如普朗克，将至少提高一个数量级的限制，从而提供对DM粒子性质的敏感探测。
The injection of secondary particles produced by dark matter (DM) annihilation around redshift {approx}1000 would inevitably affect the process of recombination, leaving an imprint on cosmic microwave background (CMB) anisotropies and polarization. We show that the most recent CMB measurements provided by the WMAP satellite mission place interesting constraints on DM self-annihilation rates, especially for models that exhibit a large Sommerfeld enhancement of the annihilation cross section, as recently proposed to fit the PAMELA and ATIC results. Furthermore, we argue that upcoming CMB experiments such as Planck, will improve the constraints by at least 1 order of magnitude, thus providing a sensitive probe of the properties of DM particles.