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Measurement of Cosmic-Ray Antiproton Spectrum at Solar Minimum with a Long-Duration Balloon Flight in AntarcticaThe energy spectrum of cosmic-ray antiprotons (p(raised bar)'s) collected by the BESS-Polar II instrument during a long-duration flight over Antarctica in the solar minimum period of December 2007 through January 2008. The p(raised bar) spectrum measured by BESS-Polar II shows good consistency with secondary p(raised bar) calculations. Cosmologically primary p(raised bar)'s have been searched for by comparing the observed and calculated p(raised bar) spectra. The BESSPolar II result shows no evidence of primary p(raised bar)'s originating from the evaporation of PBH.
Document ID
20110015540
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Abe, K. (Kobe Univ. Japan)
Fuke, H. (Institute of Space and Astronautical Science Sagamihara, Japan)
Haino, S. (High Energy Accelerator Research Organization Ibaraki, Japan)
Hams, T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hasegawa, M. (High Energy Accelerator Research Organization Ibaraki, Japan)
Horikoshi, A. (High Energy Accelerator Research Organization Ibaraki, Japan)
Kim, K. C. (Maryland Univ. College Park, MD, United States)
Kusumoto, A. (Kobe Univ. Japan)
Lee, M. H. (Maryland Univ. College Park, MD, United States)
Makida, Y. (High Energy Accelerator Research Organization Ibaraki, Japan)
Matsuda, S. (High Energy Accelerator Research Organization Ibaraki, Japan)
Matsukawa, Y. (Kobe Univ. Japan)
Mitchell, J. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Nishimura, J. (Tokyo Univ. Bunkyo, Japan)
Nozaki, M. (High Energy Accelerator Research Organization Ibaraki, Japan)
Orito, R. (Kobe Univ. Japan)
Ormes, J. F. (Denver Univ. Denver, CO, United States)
Sakai, K. (Tokyo Univ. Bunkyo, Japan)
Sasaki, M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Seo, E. S. (Maryland Univ. College Park, MD, United States)
Shinoda, R. (Tokyo Univ. Bunkyo, Japan)
Streitmatter, R. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Suzuki, J. (High Energy Accelerator Research Organization Ibaraki, Japan)
Tanaka, K. (High Energy Accelerator Research Organization Ibaraki, Japan)
Thakur, N. (Denver Univ. Denver, CO, United States)
Date Acquired
August 25, 2013
Publication Date
July 27, 2011
Subject Category
Astronomy
Report/Patent Number
GSFC.JA.5041.2011
Distribution Limits
Public
Copyright
Public Use Permitted.

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