Kobe University, Kobe, Hyogo 657-8501, Japan.
Phys Rev Lett. 2012 Feb 3;108(5):051102. doi: 10.1103/PhysRevLett.108.051102. Epub 2012 Jan 31.
The energy spectrum of cosmic-ray antiprotons (p's) from 0.17 to 3.5 GeV has been measured using 7886 p's detected by BESS-Polar II during a long-duration flight over Antarctica near solar minimum in December 2007 and January 2008. This shows good consistency with secondary p calculations. Cosmologically primary p's have been investigated by comparing measured and calculated p spectra. BESS-Polar II data show no evidence of primary p's from the evaporation of primordial black holes.
利用 BESS-Polar II 在 2007 年 12 月至 2008 年 1 月太阳活动极小期期间在南极洲进行的一次长时间飞行中探测到的 7886 个反质子，测量了 0.17 至 3.5 GeV 的宇宙射线反质子（p's）能谱。这与二次 p 计算结果很好地一致。通过比较测量和计算的 p 能谱，研究了宇宙学中的原始 p's。BESS-Polar II 数据没有表明原初黑洞蒸发产生原始 p's 的证据。
