Measurement of cosmic-ray low-energy antiproton spectrum with the first BESS-Polar Antarctic flight

The BESS-Polar spectrometer had its first successful balloon flight over Antarctica in December 2004. During the 8.5-day long-duration flight, almost 0.9 billion events were recorded and 1,520 antiprotons were detected in the energy range 0.1– 4.2 GeV. In this paper, we report the antiproton spectru...

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Bibliographic Details
Main Authors: K. Abe A, H. Fuke B, S. Haino C, T. Hams D, A. Itazaki A, K. C. Kim E, T. Kumazawa C, M. H. Lee E, Y. Makida C, S. Matsuda C, K. Matsumoto C, J. W. Mitchell D, A. A. Moiseev D, Z. Myers E, J. Nishimura F, M. Nozaki C, R. Orito A, J. F. Ormes G, M. Sasaki D, E. S. Seo E, Y. Shikaze A, R. E. Streitmatter D, J. Suzuki C, Y. Takasugi A, K. Takeuchi A, K. Tanaka C, T. Yamagami B, A. Yamamoto C, T. Yoshida B, K. Yoshimura C
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published:
Subjects:
Key words
cosmic-ray antiproton
solar modulation
superconducting
Antarctic
Antarc*
Antarctica
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.312.8427
http://arxiv.org/pdf/0805.1754v1.pdf
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Summary:The BESS-Polar spectrometer had its first successful balloon flight over Antarctica in December 2004. During the 8.5-day long-duration flight, almost 0.9 billion events were recorded and 1,520 antiprotons were detected in the energy range 0.1– 4.2 GeV. In this paper, we report the antiproton spectrum obtained, discuss the origin of cosmic-ray antiprotons, and use antiprotons to probe the effect of charge sign dependent drift in the solar modulation.

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