Precision measurement of cosmic-ray antiproton spectrum

S. Orito, T. Maeno, H. Matsunaga, K. Abe, K. Anraku, Y. Asaoka, M. Fujikawa, M. Imori, M. Ishino, Y. Makida, N. Matsui, H. Matsumoto, J. Mitchell, T. Mitsui, A. Moiseev, M. Motoki, J. Nishimura, M. Nozaki, J. Ormes, T. SaekiT. Sanuki, M. Sasaki, E. S. Seo, Y. Shikaze, T. Sonoda, R. Streitmatter, J. Suzuki, K. Tanaka, I. Ueda, N. Yajima, T. Yamagami, A. Yamamoto, T. Yoshida, K. Yoshimura

研究成果: Article査読

262 被引用数 (Scopus)

抄録

The energy spectrum of cosmic-ray antiprotons (p¯′s) has been measured in the range 0.18−3.56 GeV, based on 458 (p¯′s) collected by BESS in a recent solar-minimum period. We have detected for the first time a characteristic peak at 2 GeV of (p¯′s) originating from cosmic-ray interactions with the interstellar gas. The peak spectrum is reproduced by theoretical calculations, implying that the propagation models are basically correct and that different cosmic-ray species undergo a universal propagation. Future BESS data with still higher statistics will allow us to study the solar modulation and the propagation in detail and to search for primary p¯ components.

本文言語English
ページ(範囲)1078-1081
ページ数4
ジャーナルPhysical Review Letters
84
6
DOI
出版ステータスPublished - 2000
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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