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arXiv 0905.0956hep-ph
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暗物质的有效理论和暗物质界的新力量

Effective Theory for Dark Matter and a New Force in the Dark Matter Sector

Xavier Calmet, Swarup Kumar Majee

摘要:

最近有人提出了一个关于暗物质的有效理论。关键的假设是,作为狄拉克费米子的暗物质粒子受到整体U(1)对称性的保护而不会衰变。我们指出,量子引力效应会破坏这种对称性,因此候选的暗物质衰变得非常快。为了解决这个问题,我们建议考虑一个局部规范对称性,这意味着一个新的力量在暗物质部门。这种新的局部U(1)对称性很可能需要自发破缺,导致模型参数范围内的湮灭截面的索末菲增强,这有助于解释Pamela和ATIC使用质量在TeV范围内的弱相互作用大质量粒子的结果。

英文摘要:

An effective theory for dark matter has recently been proposed. The key assumption is that the dark matter particle which is a Dirac fermion is protected from decaying by a global U(1) symmetry. We point out that quantum gravity effects will violate this symmetry and that the dark matter candidate thus decays very fast. In order to solve that problem, we propose to consider a local gauge symmetry which implies a new force in the dark matter sector. It is likely that this new local U(1) symmetry will need to be spontaneously broken leading for a range of the parameters of the model to a Sommerfeld enhancement of the annihilation cross-sections which is useful to explain the Pamela and ATIC results using a weakly interacting massive particle with a mass in the TeV range.

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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