6 papers
Measurements of Cosmic-ray Low-energy Antiproton and Proton Spectra in a Transient Period of the Solar Field Reversal
Y. Asaoka, Y. Shikaze, K. Abe +39
The energy spectra of cosmic-ray low-energy antiprotons and protons have been measured by BESS in 1999 and 2000, during a period covering the solar magnetic field reversal. Based o…
Successive Measurements of Cosmic-Ray Antiproton Spectrum in a Positive Phase of the Solar Cycle
T. Maeno, S. Orito, H. Matsunaga +1
The energy spectrum of cosmic-ray antiprotons has been measured by BESS successively in 1993, 1995, 1997 and 1998. In total, 848 antiprotons were clearly identified in energy range…
Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer
T. Sanuki, M. Motoki, H. Matsumoto +31
We report cosmic-ray proton and helium spectra in energy ranges of 1 to 120 GeV and 1 to 54 GeV/nucleon, respectively, measured by a balloon flight of the BESS spectrometer in 1998…
Precision Measurement of Cosmic-Ray Antiproton Spectrum
S. Orito, T. Maeno, H. Matsunaga +31
The energy spectrum of cosmic-ray antiprotons has been measured in the range 0.18 to 3.56 GeV, based on 458 antiprotons collected by BESS in recent solar-minimum period. We have de…
Expected Enhancement of the Primary Antiproton Flux at the Solar Minimum
T. Mitsui, K. Maki, S. Orito
We calculate the solar-modulated energy spectra of cosmic-ray antiprotons ('s) from two candidate primary sources, i.e., evaporating primordial black holes and the annihil…
Local Flux of Low-Energy Antiprotons from Evaporating Primordial Black Holes
K. Maki, T. Mitsui, S. Orito
We investigate low-energy cosmic-ray antiprotons ('s) arising from the fragmentation of quarks and gluons emitted from evaporating primordial black holes (PBHs). To calcul…