کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1771159 | 1020732 | 2010 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A statistical procedure for the identification of positrons in the PAMELA experiment A statistical procedure for the identification of positrons in the PAMELA experiment](/preview/png/1771159.png)
The PAMELA satellite experiment has measured the cosmic-ray positron fraction between 1.5 GeV and 100 GeV. The need to reliably discriminate between the positron signal and proton background has required the development of an ad hoc analysis procedure. In this paper, a method for positron identification is described and its stability and capability to yield a correct background estimate is shown. The analysis includes new experimental data, the application of three different fitting techniques for the background sample and an estimate of systematic uncertainties due to possible inaccuracies in the background selection. The new experimental results confirm both solar modulation effects on cosmic-rays with low rigidities and an anomalous positron abundance above 10 GeV.
Journal: Astroparticle Physics - Volume 34, Issue 1, August 2010, Pages 1–11