arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0905.0003astro-ph.COgr-qchep-ph
收藏

大湮灭截面暗物质模型的CMB约束

CMB constraints on Dark Matter models with large annihilation cross-section

S. Galli, F. Iocco, G. Bertone, A. Melchiorri

摘要:

在红移1000附近,暗物质湮灭产生的次级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)各向异性和极化上留下印记。我们发现,最近的CMB测量提供的WMAP卫星任务放置有趣的约束DM的自湮灭率,特别是对于模型,表现出一个大的索末菲增强的湮灭截面,最近提出了适合PAMELA和ATIC的结果。此外,我们认为,即将到来的CMB实验,如普朗克,将改善约束至少一个数量级,从而提供了一个敏感的探针DM粒子的属性。

英文摘要:

The injection of secondary particles produced by Dark Matter (DM) annihilation around redshift 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 one order of magnitude, thus providing a sensitive probe of the properties of DM particles.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑