Search for cosmic-ray antideuterons.
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.
Fuke
H
H
Institute of Space and Astronautical Science (ISAS/JAXA), Sagamihara, Kanagawa 229-8510, Japan. fuke@balloon.isas.jaxa.jp
Maeno
T
T
Abe
K
K
Haino
S
S
Makida
Y
Y
Matsuda
S
S
Matsumoto
H
H
Mitchell
J W
JW
Moiseev
A A
AA
Nishimura
J
J
Nozaki
M
M
Orito
S
S
Ormes
J F
JF
Sasaki
M
M
Seo
E S
ES
Shikaze
Y
Y
Streitmatter
R E
RE
Suzuki
J
J
Tanaka
K
K
Tanizaki
K
K
Yamagami
T
T
Yamamoto
A
A
Yamamoto
Y
Y
Yamato
K
K
Yoshida
T
T
Yoshimura
K
K