CMB constraints on dark matter models with large annihilation cross section

被引：278

作者：

Galli, Silvia ^{[1
,2
,3
]}

Iocco, Fabio ^{[4
,5
,6
]}

Bertone, Gianfranco ^{[6
]}

Melchiorri, Alessandro ^{[2
,3
]}

机构：

[1] Univ Paris Diderot, Lab Astroparticule & Cosmol APC, F-75205 Paris 13, France

[2] Univ Roma La Sapienza, Dept Phys, I-00185 Rome, Italy

[3] Univ Roma La Sapienza, Ist Nazl Fis Nucl, I-00185 Rome, Italy

[4] CNRS, URA 2306, Inst Phys Theor, F-91191 Gif Sur Yvette, France

[5] CEA Saclay, F-91191 Gif Sur Yvette, France

[6] Univ Paris 06, CNRS, UMR 7095, Inst Astrophys, F-75014 Paris, France

来源：

PHYSICAL REVIEW D | 2009年 / 80卷 / 02期

关键词：

RECOMBINATION; IONIZATION; ENERGIES; SPECTRUM;

D O I：

10.1103/PhysRevD.80.023505

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The injection of secondary particles produced by dark matter (DM) annihilation around redshift similar to 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.

引用

页数：6

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