关于ATIC与Fermi数据的差异
On discrepancy between ATIC and Fermi data
摘要：
无论是ATIC还是Fermi-LAT数据都可以通过三个分量与PAMELA数据拟合在一起：初级背景~ E^{-3.3}、次级背景~ E^{-3.6}和附加电子源~ E^{-g_a} Exp（-E/ E_{cut}）。我们发现ATIC + PAMELA和Fermi + PAMELA的最佳拟合近似相同，g_a ~ 2和E_{cut} ~ 500 GeV.然而，ATIC数据在300 GeV和600 GeV之间有一个狭窄的凸起，这与平滑的费米谱相矛盾。本文讨论了用暗物质模型和暗粒子对ATIC凸点和无特征费米谱的解释。
英文摘要：
Either ATIC or Fermi-LAT data can be fitted together with the PAMELA data by three components: primary background ~ E^{-3.3}, secondary background ~ E^{-3.6}, and an additional source of electrons ~ E^{-g_a} Exp(-E/E_{cut}). We find that the best fits for ATIC + PAMELA and for Fermi + PAMELA are approximately the same, g_a ~ 2 and E_{cut} ~ 500 GeV. However, the ATIC data have a narrow bump between 300 GeV and 600 GeV which contradicts the smooth Fermi spectrum. An interpretation of the ATIC bump as well as the featureless Fermi spectrum in terms of dark matter models and pulsars is discussed.
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