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.
|出版ステータス||Published - 2011|
|イベント||32nd International Cosmic Ray Conference, ICRC 2011 - Beijing|
継続期間: 8月 11 2011 → 8月 18 2011
|Other||32nd International Cosmic Ray Conference, ICRC 2011|
|Period||8/11/11 → 8/18/11|
ASJC Scopus subject areas