Precision measurement of antiproton spectrum with bess

S. Orito, T. Maeno, H. Matsunaga, K. Abe, K. Anraku, Yoichi 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 & 14 others 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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The absolute fluxes of the cosmic-ray antiproton are measured at solar minimum in the energy range 0.2 to 3.2 GeV, based on 460 antiprotons unambiguously detected by BESS spectrometer during its '95 and '97 balloon flights from Lynn Lake, Canada. In the resultant antiproton spectrum we have detected a clear peak around 2 GeV and measured its flux to 10 % accuracy. The position and the absolute flux of the peak agree with the prediction of the Standard Leaky Box model for the "secondary" antiprotons. At low energies below 1 GeV, we observe an excess antiproton flux over the simple Standard Leaky Box prediction. This might indicate that the propagation mechanism needs to be modified, or might suggest a contribution of low-energy antiproton component from novel sources such as evaporating primordial black holes or the annihilating neutralino dark matter. Data from '98 and future flights are expected to help us to clarify the situation.

Original languageEnglish
Pages (from-to)1847-1850
Number of pages4
JournalAdvances in Space Research
Volume26
Issue number11
DOIs
Publication statusPublished - 2000 Dec
Externally publishedYes

Fingerprint

antiprotons
Fluxes
flight
energy
prediction
cosmic ray
boxes
Cosmic rays
Balloons
spectrometer
BESS (satellite)
balloon flight
Lakes
Spectrometers
lake
predictions
Canada
lakes
cosmic rays
dark matter

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Orito, S., Maeno, T., Matsunaga, H., Abe, K., Anraku, K., Asaoka, Y., ... Yoshimura, K. (2000). Precision measurement of antiproton spectrum with bess. Advances in Space Research, 26(11), 1847-1850. https://doi.org/10.1016/S0273-1177(99)01235-1

Precision measurement of antiproton spectrum with bess. / Orito, S.; Maeno, T.; Matsunaga, H.; Abe, K.; Anraku, K.; Asaoka, Yoichi; 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, E. S.; Shikaze, Y.; Sonoda, T.; Streitmatter, R.; Suzuki, J.; Tanaka, K.; Ueda, I.; Yajima, N.; Yamagami, T.; Yamamoto, A.; Yoshida, T.; Yoshimura, K.

In: Advances in Space Research, Vol. 26, No. 11, 12.2000, p. 1847-1850.

Research output: Contribution to journalArticle

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 antiproton spectrum with bess', Advances in Space Research, vol. 26, no. 11, pp. 1847-1850. https://doi.org/10.1016/S0273-1177(99)01235-1
Orito, S. ; Maeno, T. ; Matsunaga, H. ; Abe, K. ; Anraku, K. ; Asaoka, Yoichi ; 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, E. S. ; Shikaze, Y. ; Sonoda, T. ; Streitmatter, R. ; Suzuki, J. ; Tanaka, K. ; Ueda, I. ; Yajima, N. ; Yamagami, T. ; Yamamoto, A. ; Yoshida, T. ; Yoshimura, K. / Precision measurement of antiproton spectrum with bess. In: Advances in Space Research. 2000 ; Vol. 26, No. 11. pp. 1847-1850.
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AU - Maeno, T.

AU - Matsunaga, H.

AU - Abe, K.

AU - Anraku, K.

AU - Asaoka, Yoichi

AU - Fujikawa, M.

AU - Imori, M.

AU - Ishino, M.

AU - Makida, Y.

AU - Matsui, N.

AU - Matsumoto, H.

AU - Mitchell, J.

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AU - Moiseev, A.

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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.

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