Progress in search for antihelium with BESS

M. Sasaki; H. Matsumoto; M. Nozaki; T. Saeki; K. Abe; K. Anraku; Y. Asaoka; M. Fujikawa; H. Fuke; M. Imori; S. Haino; K. Izumi; T. Maeno; Y. Makida; S. Matsuda; N. Matsui; T. Matsukawa; H. Matsunaga; J. W. Mitchell; T. Mitsui; A. Moiseev; M. Motoki; J. Nishimura; S. Orito; J. F. Ormes; T. Sanuki; Y. Shikaze; E. S. Seo; Y. Sonoda; R. Streitmatter; J. Suzuki; K. Tanaka; K. Tanizaki; I. Ueda; J. Z. Wang; Y. Yajima; Y. Yamagami; A. Yamamoto; Y. Yamamoto; K. Yamato; T. Yoshida; K. Yoshimura

doi:10.1016/S0920-5632(02)01842-X

Progress in search for antihelium with BESS

M. Sasaki^*, H. Matsumoto, M. Nozaki, T. Saeki, K. Abe, K. Anraku, Y. Asaoka, M. Fujikawa, H. Fuke, M. Imori, S. Haino, K. Izumi, T. Maeno, Y. Makida, S. Matsuda, N. Matsui, T. Matsukawa, H. Matsunaga, J. W. Mitchell, T. MitsuiA. Moiseev, M. Motoki, J. Nishimura, S. Orito, J. F. Ormes, T. Sanuki, Y. Shikaze, E. S. Seo, Y. Sonoda, R. Streitmatter, J. Suzuki, K. Tanaka, K. Tanizaki, I. Ueda, J. Z. Wang, Y. Yajima, Y. Yamagami, A. Yamamoto, Y. Yamamoto, K. Yamato, T. Yoshida, K. Yoshimura

^*Corresponding author for this work

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

24 Citations (Scopus)

Abstract

We have searched for antihelium nuclei in cosmic rays using the data obtained from balloon flights of the BESS magnetic spectrometer. The search was mainly based on track-quality selection, followed by rigidity analysis, and on the time-of-flight and dE/dx measurements by the scintillation counter hodoscope. We analysed all the data collected during 1993-2000 with a common analysis procedure. No antihelium nuclei events were found in the energy range from 1 to 14 GV. In order to determine a new upper limit, we have simulated the loss in the air and in the instrument of He (He) using the GEANT/GHEISHA code. Combined with the data collected in 1993 through 2000, a new 95 % confidence upper limit for the ratio of He/He at the top of the atmosphere of 6.8 × 10^-7 has been obtained to be after correcting for the interactions in the air and in the instruments.

Original language	English
Pages (from-to)	202-207
Number of pages	6
Journal	Nuclear Physics B - Proceedings Supplements
Volume	113
Issue number	1-3
DOIs	https://doi.org/10.1016/S0920-5632(02)01842-X
Publication status	Published - 2002 Dec
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics

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10.1016/S0920-5632(02)01842-X

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Sasaki, M., Matsumoto, H., Nozaki, M., Saeki, T., Abe, K., Anraku, K., Asaoka, Y., Fujikawa, M., Fuke, H., Imori, M., Haino, S., Izumi, K., Maeno, T., Makida, Y., Matsuda, S., Matsui, N., Matsukawa, T., Matsunaga, H., Mitchell, J. W., ... Yoshimura, K. (2002). Progress in search for antihelium with BESS. Nuclear Physics B - Proceedings Supplements, 113(1-3), 202-207. https://doi.org/10.1016/S0920-5632(02)01842-X

Sasaki, M, Matsumoto, H, Nozaki, M, Saeki, T, Abe, K, Anraku, K, Asaoka, Y, Fujikawa, M, Fuke, H, Imori, M, Haino, S, Izumi, K, Maeno, T, Makida, Y, Matsuda, S, Matsui, N, Matsukawa, T, Matsunaga, H, Mitchell, JW, Mitsui, T, Moiseev, A, Motoki, M, Nishimura, J, Orito, S, Ormes, JF, Sanuki, T, Shikaze, Y, Seo, ES, Sonoda, Y, Streitmatter, R, Suzuki, J, Tanaka, K, Tanizaki, K, Ueda, I, Wang, JZ, Yajima, Y, Yamagami, Y, Yamamoto, A, Yamamoto, Y, Yamato, K, Yoshida, T & Yoshimura, K 2002, 'Progress in search for antihelium with BESS', Nuclear Physics B - Proceedings Supplements, vol. 113, no. 1-3, pp. 202-207. https://doi.org/10.1016/S0920-5632(02)01842-X

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title = "Progress in search for antihelium with BESS",

abstract = "We have searched for antihelium nuclei in cosmic rays using the data obtained from balloon flights of the BESS magnetic spectrometer. The search was mainly based on track-quality selection, followed by rigidity analysis, and on the time-of-flight and dE/dx measurements by the scintillation counter hodoscope. We analysed all the data collected during 1993-2000 with a common analysis procedure. No antihelium nuclei events were found in the energy range from 1 to 14 GV. In order to determine a new upper limit, we have simulated the loss in the air and in the instrument of He (He) using the GEANT/GHEISHA code. Combined with the data collected in 1993 through 2000, a new 95 % confidence upper limit for the ratio of He/He at the top of the atmosphere of 6.8 × 10-7 has been obtained to be after correcting for the interactions in the air and in the instruments.",

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

year = "2002",

month = dec,

doi = "10.1016/S0920-5632(02)01842-X",

language = "English",

volume = "113",

pages = "202--207",

journal = "Nuclear Physics B - Proceedings Supplements",

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T1 - Progress in search for antihelium with BESS

AU - Sasaki, M.

AU - Matsumoto, H.

AU - Nozaki, M.

AU - Saeki, T.

AU - Abe, K.

AU - Anraku, K.

AU - Asaoka, Y.

AU - Fujikawa, M.

AU - Fuke, H.

AU - Imori, M.

AU - Haino, S.

AU - Izumi, K.

AU - Maeno, T.

AU - Makida, Y.

AU - Matsuda, S.

AU - Matsui, N.

AU - Matsukawa, T.

AU - Matsunaga, H.

AU - Mitchell, J. W.

AU - Mitsui, T.

AU - Moiseev, A.

AU - Motoki, M.

AU - Nishimura, J.

AU - Orito, S.

AU - Ormes, J. F.

AU - Sanuki, T.

AU - Shikaze, Y.

AU - Seo, E. S.

AU - Sonoda, Y.

AU - Streitmatter, R.

AU - Suzuki, J.

AU - Tanaka, K.

AU - Tanizaki, K.

AU - Ueda, I.

AU - Wang, J. Z.

AU - Yajima, Y.

AU - Yamagami, Y.

AU - Yamamoto, A.

AU - Yamamoto, Y.

AU - Yamato, K.

AU - Yoshida, T.

AU - Yoshimura, K.

PY - 2002/12

Y1 - 2002/12

N2 - We have searched for antihelium nuclei in cosmic rays using the data obtained from balloon flights of the BESS magnetic spectrometer. The search was mainly based on track-quality selection, followed by rigidity analysis, and on the time-of-flight and dE/dx measurements by the scintillation counter hodoscope. We analysed all the data collected during 1993-2000 with a common analysis procedure. No antihelium nuclei events were found in the energy range from 1 to 14 GV. In order to determine a new upper limit, we have simulated the loss in the air and in the instrument of He (He) using the GEANT/GHEISHA code. Combined with the data collected in 1993 through 2000, a new 95 % confidence upper limit for the ratio of He/He at the top of the atmosphere of 6.8 × 10-7 has been obtained to be after correcting for the interactions in the air and in the instruments.

AB - We have searched for antihelium nuclei in cosmic rays using the data obtained from balloon flights of the BESS magnetic spectrometer. The search was mainly based on track-quality selection, followed by rigidity analysis, and on the time-of-flight and dE/dx measurements by the scintillation counter hodoscope. We analysed all the data collected during 1993-2000 with a common analysis procedure. No antihelium nuclei events were found in the energy range from 1 to 14 GV. In order to determine a new upper limit, we have simulated the loss in the air and in the instrument of He (He) using the GEANT/GHEISHA code. Combined with the data collected in 1993 through 2000, a new 95 % confidence upper limit for the ratio of He/He at the top of the atmosphere of 6.8 × 10-7 has been obtained to be after correcting for the interactions in the air and in the instruments.

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EP - 207

JO - Nuclear Physics B - Proceedings Supplements

JF - Nuclear Physics B - Proceedings Supplements

IS - 1-3

ER -

Progress in search for antihelium with BESS

Abstract

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