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arXiv 0906.4306hep-ph
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用中微子暗物质解释WMAP霾

Explaining the WMAP Haze with Neutralino Dark Matter

Gabriel Caceres

摘要:

有人认为,WMAP观测到的银河系中心周围区域的异常辐射,被称为WMAP霾,可能是暗物质湮灭中产生的相对论电子和正电子的同步辐射。特别是,所观察到的发射的角分布,光谱和强度是一致的信号,预计将导致从一个弱电磁场规模的质量和湮灭截面附近的预测值为热遗迹。在这里,我们重新审视这个信号的背景下的超对称性和评估的约束最小超对称标准模型的参数空间。我们发现,在大部分的超对称参数空间的最轻的中性伴子被预测具有所需的属性产生的WMAP霾。特别是,焦点,A-漏斗,和散装地区通常预测的质量,湮灭截面,并占主导地位的湮灭模式,所需的范围内产生的WMAP雾的观察功能的中性伴子。相反,星共湮灭区不适合作为这种信号起源的解释。如果WMAP霾确实是由中性伴子湮灭产生的,那么未来的探测前景似乎很有希望。

英文摘要:

It has been argued that the anomalous emission from the region around the Galactic Center observed by WMAP, known as the WMAP Haze, may be the synchrotron emission from relativistic electrons and positrons produced in dark matter annihilations. In particular, the angular distribution, spectrum, and intensity of the observed emission are consistent with the signal expected to result from a WIMP with an electroweak-scale mass and an annihilation cross section near the value predicted for a thermal relic. Here we revisit this signal within the context of supersymmetry and evaluate the parameter space of the Constrained Minimal Supersymmetric Standard Model. We find that over much of the supersymmetric parameter space the lightest neutralino is predicted to possess the properties required to generate the WMAP Haze. In particular, the focus point, A-funnel, and bulk regions typically predict a neutralino with a mass, annihilation cross section, and dominant annihilation modes that are within the range required to produce the observed features of the WMAP Haze. The stau-coannihilation region, in contrast, is disfavored as an explanation for the origin of this signal. If the WMAP Haze is indeed produced by annihilating neutralinos, prospects for future detection seem promising.

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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