New measurement of the cosmic-ray positron fraction from 5 to 15 GeV.
New measurement of the cosmic-ray positron fraction from 5 to 15 GeV.
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DOI：
10.1103/physrevlett.93.241102
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发表时间：
2004-12
影响因子：
8.6
通讯作者：
J. Beatty;A. Bhattacharyya;C. Bower;S. Coutu;M. DuVernois;S. McKee;S. Minnick;D. Müller;
中科院分区：
文献类型：
--
作者：
J. Beatty;A. Bhattacharyya;C. Bower;S. Coutu;M. DuVernois;S. McKee;S. Minnick;D. Müller;
我们提出了一个新的测量宇宙射线正电子分数在5和15 GeV之间的能量与球载HEAT-pbar仪器在2000年春天。这里提供的数据与我们以前用不同仪器获得的测量结果一致。从三个HEAT飞行的组合数据表明一个小的正电子通量的非标准起源高于5 GeV。我们比较新的测量与早期的数据与HEAT-e（+/-）仪器，在太阳周期的相反时期，并得出结论，我们的测量不支持预测的电荷符号依赖太阳调制的正电子丰度在5 GeV。
We present a new measurement of the cosmic-ray positron fraction at energies between 5 and 15 GeV with the balloon-borne HEAT-pbar instrument in the spring of 2000. The data presented here are compatible with our previous measurements, obtained with a different instrument. The combined data from the three HEAT flights indicate a small positron flux of nonstandard origin above 5 GeV. We compare the new measurement with earlier data obtained with the HEAT-e(+/-) instrument, during the opposite epoch of the solar cycle, and conclude that our measurements do not support predictions of charge sign dependent solar modulation of the positron abundance at 5 GeV.