Search for cosmic-ray antideuterons.
/ Authors
H. Fuke, T. Maeno, K. Abe, S. Haino, Y. Makida, S. Matsuda, Hiroshi Matsumoto, J. Mitchell, A. Moiseev, J. Nishimura
and 16 more authors
M. Nozaki, S. Orito, J. Ormes, M. Sasaki, E. Seo, Y. Shikaze, R. Streitmatter, Jun-ichi Suzuki, Kazushi Tanaka, K. Tanizaki, T. Yamagami, A. Yamamoto, Y. Yamamoto, K. Yamato, T. Yoshida, K. Yoshimura
/ Abstract
We performed a search for cosmic-ray antideuterons using data collected during four BESS balloon flights from 1997 to 2000. No candidate was found. We derived, for the first time, an upper limit of 1.9 x 10(-4) (m2s sr GeV/nucleon)(-1) for the differential flux of cosmic-ray antideuterons, at the 95% confidence level, between 0.17 and 1.15 GeV/nucleon at the top of the atmosphere.
Journal: Physical review letters