Measurement of low-energy cosmic-ray antiprotons at solar minimum

H. Matsunaga; S. Orito; H. Matsumoto; K. Yoshimura; A. Moiseev; K. Anraku; R. Golden; M. Imori; Y. Makida; J. Mitchell; M. Motoki; J. Nishimura; M. Nozaki; J. Ormes; T. Saeki; T. Sanuki; R. Streitmatter; J. Suzuki; K. Tanaka; I. Ueda; N. Yajima; T. Yamagami; A. Yamamoto; T. Yoshida

doi:10.1103/PhysRevLett.81.4052

Measurement of low-energy cosmic-ray antiprotons at solar minimum

H. Matsunaga, S. Orito, H. Matsumoto, K. Yoshimura, A. Moiseev, K. Anraku, R. Golden, M. Imori, Y. Makida, J. Mitchell, M. Motoki, J. Nishimura, M. Nozaki, J. Ormes, T. Saeki, T. Sanuki, R. Streitmatter, J. Suzuki, K. Tanaka, I. UedaN. Yajima, T. Yamagami, A. Yamamoto, T. Yoshida

Research output: Contribution to journal › Article › peer-review

67 Citations (Scopus)

Abstract

The absolute fluxes of the cosmic-ray antiprotons at solar minimum are measured in the energy range 0.18 to 1.4 GeV, based on 43 events unambiguously detected in BESS 1995 data.The resultant energy spectrum appears to be flat below 1 GeV, compatible with a possible admixture of primary antiproton component with a soft energy spectrum, while the possibility of secondary antiprotons alone explaining the data cannot be excluded with the present accuracy.Further improvement of statistical accuracy and extension of the energy range are planned in future BESS flights.

Original language	English
Pages (from-to)	4052-4055
Number of pages	4
Journal	Physical Review Letters
Volume	81
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.81.4052
Publication status	Published - Sept 7 1998
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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Matsunaga, H., Orito, S., Matsumoto, H., Yoshimura, K., Moiseev, A., Anraku, K., Golden, R., Imori, M., Makida, Y., Mitchell, J., Motoki, M., Nishimura, J., Nozaki, M., Ormes, J., Saeki, T., Sanuki, T., Streitmatter, R., Suzuki, J., Tanaka, K., ... Yoshida, T. (1998). Measurement of low-energy cosmic-ray antiprotons at solar minimum. Physical Review Letters, 81(19), 4052-4055. https://doi.org/10.1103/PhysRevLett.81.4052

Matsunaga, H, Orito, S, Matsumoto, H, Yoshimura, K, Moiseev, A, Anraku, K, Golden, R, Imori, M, Makida, Y, Mitchell, J, Motoki, M, Nishimura, J, Nozaki, M, Ormes, J, Saeki, T, Sanuki, T, Streitmatter, R, Suzuki, J, Tanaka, K, Ueda, I, Yajima, N, Yamagami, T, Yamamoto, A & Yoshida, T 1998, 'Measurement of low-energy cosmic-ray antiprotons at solar minimum', Physical Review Letters, vol. 81, no. 19, pp. 4052-4055. https://doi.org/10.1103/PhysRevLett.81.4052

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abstract = "The absolute fluxes of the cosmic-ray antiprotons at solar minimum are measured in the energy range 0.18 to 1.4 GeV, based on 43 events unambiguously detected in BESS 1995 data.The resultant energy spectrum appears to be flat below 1 GeV, compatible with a possible admixture of primary antiproton component with a soft energy spectrum, while the possibility of secondary antiprotons alone explaining the data cannot be excluded with the present accuracy.Further improvement of statistical accuracy and extension of the energy range are planned in future BESS flights.",

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T1 - Measurement of low-energy cosmic-ray antiprotons at solar minimum

AU - Matsunaga, H.

AU - Orito, S.

AU - Matsumoto, H.

AU - Yoshimura, K.

AU - Moiseev, A.

AU - Anraku, K.

AU - Golden, R.

AU - Imori, M.

AU - Makida, Y.

AU - Mitchell, J.

AU - Motoki, M.

AU - Nishimura, J.

AU - Nozaki, M.

AU - Ormes, J.

AU - Saeki, T.

AU - Sanuki, 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.

PY - 1998/9/7

Y1 - 1998/9/7

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AB - The absolute fluxes of the cosmic-ray antiprotons at solar minimum are measured in the energy range 0.18 to 1.4 GeV, based on 43 events unambiguously detected in BESS 1995 data.The resultant energy spectrum appears to be flat below 1 GeV, compatible with a possible admixture of primary antiproton component with a soft energy spectrum, while the possibility of secondary antiprotons alone explaining the data cannot be excluded with the present accuracy.Further improvement of statistical accuracy and extension of the energy range are planned in future BESS flights.

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Measurement of low-energy cosmic-ray antiprotons at solar minimum

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