Search for novel origins of cosmic-ray antiprotons and antimatter with BESS-polar flight over antarctica

Koji Yoshimura, S. Haino, M. Hasegawa, A. Horikoshi, T. Kumazawa, Y. Makida, S. Matsuda, K. Matsumoto, M. Nozaki, J. Suzuki, K. Tanaka, A. Yamamoto, T. Hams, J. W. Mitchell, A. A. Moiseev, R. E. Streitmatter, M. Sasaki, K. Abe, Itazaki, Y. MatsukawaY. Shikaze, R. Orito, Y. Takasugi, K. Takeuchi, H. Fuke, T. Yamagami, T. Yoshida, K. C. Kim, M. H. Lee, Z. Myers, E. S. Seo, J. Nishimura, K. Sakai, R. Shinoda, J. F. Ormes, N. Thakur

Research output: Contribution to journalConference article

Abstract

The primary aims of the BESS-Polar program are precise measurements of the low-energy antiproton spectrum and search for cosmologically significant antimatter, which would provide new clues to understand the early Universe. The second flight (BESS-Polar II) over Antarctica was successfully carried out in Dec 2007 - Jan 2008. We performed 24.5days scientific observation just at the solar minimum. The payload worked well during the flight and 4.7 billion cosmic-ray events were collected. Based on the BESS-Polar II data, we present recent preliminary results of cosmic-ray antiproton measurements and sensitive search for antimatter.

Original languageEnglish
JournalProceedings of Science
Volume120
Publication statusPublished - Jan 1 2010
Event35th International Conference of High Energy Physics, ICHEP 2010 - Paris, France
Duration: Jul 22 2010Jul 28 2010

ASJC Scopus subject areas

  • General

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    Yoshimura, K., Haino, S., Hasegawa, M., Horikoshi, A., Kumazawa, T., Makida, Y., Matsuda, S., Matsumoto, K., Nozaki, M., Suzuki, J., Tanaka, K., Yamamoto, A., Hams, T., Mitchell, J. W., Moiseev, A. A., Streitmatter, R. E., Sasaki, M., Abe, K., Itazaki, ... Thakur, N. (2010). Search for novel origins of cosmic-ray antiprotons and antimatter with BESS-polar flight over antarctica. Proceedings of Science, 120.