AMS-02数据面临附近源的cosmic ray秒加速
AMS-02 data confronts acceleration of cosmic ray secondaries in nearby sources
摘要：
根据阿尔法磁谱仪（AMS-02）实验的新数据，我们重新审视了早先提出的模型，以解释观测到的宇宙射线中正电子分数随能量增加而增加的现象。该模型解释了附近超新星遗迹中次级电子和正电子的产生和加速，这导致了一个额外的，更硬的成分，在高能量下成为主导。通过将其与AMS-02数据拟合，我们可以计算出硼碳比以及反质子分数的预期伴随上升。如果这些预测被即将到来的AMS-02数据证实，它将最终排除所有其他提出的解释，特别是暗物质湮灭或衰变。
英文摘要：
We revisit the model proposed earlier to account for the observed increase in the positron fraction in cosmic rays with increasing energy, in the light of new data from the Alpha Magnetic Spectrometer (AMS-02) experiment. The model accounts for the production and acceleration of secondary electrons and positrons in nearby supernova remnants which results in an additional, harder component that becomes dominant at high energies. By fitting this to AMS-02 data we can calculate the expected concomitant rise of the boron-to-carbon ratio, as well as of the fraction of antiprotons. If these predictions are confirmed by the forthcoming AMS-02 data it would conclusively rule out all other proposed explanations, in particular dark matter annihilations or decays.
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