Abstract
The energy spectrum of cosmic-ray antiprotons (p's) has been measured in the range 0.17 to 3.5 GeV, based on 7886 p's collected by the BESS-Polar II instrument during a long duration flight over Antarctica in a Solar minimum period of December 2007 through January 2008. The p spectrum measured by BESS-Polar II shows good consistency with the secondary p calculations. Given this background of secondary p's, cosmologically primary p's have been searched for using the observed p spectrum. BESS-Polar II result shows no evidence of primary p's that originated from the evaporation of PBH.
Original language | English |
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Pages | 111-114 |
Number of pages | 4 |
DOIs | |
Publication status | Published - 2011 |
Externally published | Yes |
Event | 32nd International Cosmic Ray Conference, ICRC 2011 - Beijing, China Duration: Aug 11 2011 → Aug 18 2011 |
Other
Other | 32nd International Cosmic Ray Conference, ICRC 2011 |
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Country/Territory | China |
City | Beijing |
Period | 8/11/11 → 8/18/11 |
Keywords
- Antiproton
- BESS-polar II
ASJC Scopus subject areas
- Nuclear and High Energy Physics