203 citations · 451 across the 9 of their papers we have counts for
9 papers
Measurements of cosmic-ray proton and helium spectra from the BESS-Polar long-duration balloon flights over Antarctica
K. Abe, H. Fuke, S. Haino +34
The BESS-Polar Collaboration measured the energy spectra of cosmic-ray protons and helium during two long-duration balloon flights over Antarctica in December 2004 and December 200…
New Precision Measurement of Hyperfine Splitting of Positronium
A. Ishida, T. Namba, S. Asai +5
The ground state hyperfine splitting of positronium is sensitive to high order corrections of quantum electrodynamics (QED) in bound state. The theoretical predi…
Precise measurement of positronium hyperfine splitting using the Zeeman effect
A. Ishida, Y. Sasaki, G. Akimoto +8
Positronium is an ideal system for the research of the quantum electrodynamics (QED) in bound state. The hyperfine splitting (HFS) of positronium, , gives a good…
New method of precise measurement of positronium hyperfine splitting
A. Ishida, G. Akimoto, Y. Sasaki +8
The ground state hyperfine splitting of positronium, , is sensitive to high order corrections of QED. A new calculation up to has revealed…
Precise measurement of HFS of positronium
A. Ishida, G. Akimoto, K. Kato +11
The ground state hyperfine splitting in positronium, , is sensitive to high order corrections of QED. A new calculation up to has revealed a disc…
Measurements of 0.2 to 20 GeV/n cosmic-ray proton and helium spectra from 1997 through 2002 with the BESS spectrometer
Y. Shikaze, S. Haino, K. Abe +21
We measured low energy cosmic-ray proton and helium spectra in the kinetic energy range 0.215 - 21.5 GeV/n at different solar activities during a period from 1997 to 2002. The obse…
Measurement of Cosmic-Ray Proton and Antiproton Spectra at Mountain Altitude
T. Sanuki, M. Fujikawa, H. Matsunaga +22
Cosmic-ray proton and antiproton spectra were measured at mountain altitude, 2770 m above sea level. We observed more than 2 x 10^5 protons and 10^2 antiprotons in a kinetic energy…
Measurement of low-energy antiproton detection efficiency in BESS below 1 GeV
Y. Asaoka, K. Yoshimura, T. Yoshida +22
An accelerator experiment was performed using a low-energy antiproton beam to measure antiproton detection efficiency of BESS, a balloon-borne spectrometer with a superconducting s…
A New Limit on the Flux of Cosmic Antihelium
T. Saeki, K. Anraku, S. Orito +21
A very sensitive search for cosmic-ray antihelium was performed using data obtained from three scientific flights of BESS magnetic rigidity spectrometer. We have not observed any a…