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. Saeki; T. 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

doi:10.1103/PhysRevLett.84.1078

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

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266 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1078-1081
Number of pages	4
Journal	Physical Review Letters
Volume	84
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.84.1078
Publication status	Published - 2000
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.84.1078

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Orito, S., Maeno, T., Matsunaga, H., Abe, K., Anraku, K., Asaoka, Y., Fujikawa, M., Imori, M., Ishino, M., Makida, Y., Matsui, N., Matsumoto, H., Mitchell, J., Mitsui, T., Moiseev, A., Motoki, M., Nishimura, J., Nozaki, M., Ormes, J., ... Yoshimura, K. (2000). Precision measurement of cosmic-ray antiproton spectrum. Physical Review Letters, 84(6), 1078-1081. https://doi.org/10.1103/PhysRevLett.84.1078

Orito, S, Maeno, T, Matsunaga, H, Abe, K, Anraku, K, Asaoka, Y, Fujikawa, M, Imori, M, Ishino, M, Makida, Y, Matsui, N, Matsumoto, H, Mitchell, J, Mitsui, T, Moiseev, A, Motoki, M, Nishimura, J, Nozaki, M, Ormes, J, Saeki, T, Sanuki, T, Sasaki, M, Seo, ES, Shikaze, Y, Sonoda, T, Streitmatter, R, Suzuki, J, Tanaka, K, Ueda, I, Yajima, N, Yamagami, T, Yamamoto, A, Yoshida, T & Yoshimura, K 2000, 'Precision measurement of cosmic-ray antiproton spectrum', Physical Review Letters, vol. 84, no. 6, pp. 1078-1081. https://doi.org/10.1103/PhysRevLett.84.1078

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title = "Precision measurement of cosmic-ray antiproton spectrum",

abstract = "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.",

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

year = "2000",

doi = "10.1103/PhysRevLett.84.1078",

language = "English",

volume = "84",

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T1 - Precision measurement of cosmic-ray antiproton spectrum

AU - Orito, S.

AU - Maeno, T.

AU - Matsunaga, H.

AU - Abe, K.

AU - Anraku, K.

AU - Asaoka, Y.

AU - Fujikawa, M.

AU - Imori, M.

AU - Ishino, M.

AU - Makida, Y.

AU - Matsui, N.

AU - Matsumoto, H.

AU - Mitchell, J.

AU - Mitsui, T.

AU - Moiseev, A.

AU - Motoki, M.

AU - Nishimura, J.

AU - Nozaki, M.

AU - Ormes, J.

AU - Saeki, T.

AU - Sanuki, T.

AU - Sasaki, M.

AU - Seo, E. S.

AU - Shikaze, Y.

AU - Sonoda, T.

AU - Streitmatter, R.

AU - Suzuki, J.

AU - Tanaka, K.

AU - Ueda, I.

AU - Yajima, N.

AU - Yamagami, T.

AU - Yamamoto, A.

AU - Yoshida, T.

AU - Yoshimura, K.

PY - 2000

Y1 - 2000

N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevLett.84.1078

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JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

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Precision measurement of cosmic-ray antiproton spectrum

Abstract

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