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arXiv 1102.4658hep-phastro-ph.CO
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湮灭截面依赖于速度的暗物质模型的宇宙学约束

Cosmological constraints on dark matter models with velocity-dependent annihilation cross section

Junji Hisano, Masahiro Kawasaki, Kazunori Kohri, Takeo Moroi, Kazunori Nakayama, Toyokazu Sekiguchi

摘要:

通过Sommerfeld或Breit-Wigner增强机制的暗物质湮灭模型,推导了具有速度依赖结构的暗物质湮灭截面的宇宙学约束.在湮灭截面随暗物质速度减小而增大的模型中,大爆炸核合成和宇宙微波背景给出了严格的限制。

英文摘要:

We derive cosmological constraints on the annihilation cross section of dark matter with velocity-dependent structure, motivated by annihilating dark matter models through Sommerfeld or Breit-Wigner enhancement mechanisms. In models with annihilation cross section increasing with decreasing dark matter velocity, big-bang nucleosynthesis and cosmic microwave background give stringent constraints.

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。

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