Measurements of atmospheric antiprotons
/ Authors
K. Yamato, K. Abe, H. Fuke, S. Haino, Y. Makida, S. Matsuda, Hiroshi Matsumoto, J. Mitchell, A. Moiseev, J. Nishimura
and 14 more authors
M. Nozaki, S. Orito, J. Ormes, T. Sanuki, M. Sasaki, E. Seo, Y. Shikaze, R. Streitmatter, Jun-ichi Suzuki, Kenichi Tanaka, T. Yamagami, A. Yamamoto, T. Yoshida, K. Yoshimura
/ Abstract
We measured atmospheric antiproton spectra in the energy range 0.2 to 3.4 GeV, at sea level and at balloon altitude in the atmospheric depth range 4.5 to 26 g/cm 2 . The observed energy spectra, including our previous measurements at mountain altitude, were compared with estimated spectra calculated on various assumptions regarding the energy distribution of antiprotons that interacted with air nuclei.
Journal: Physics Letters B