Results from BESS-Polar I 2004 Antarctica Flight

Abstract: The Search for antimatter in the galactic cosmic radiation is one of the main scientific objectives of the Balloon-borne Experiment with a Superconducting Spectrometer (BESS). A flatter antiproton spectrum below the secondary production peak at 2 GeV might suggest possible novel antiproton...

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Bibliographic Details
Main Authors: T Hams, K Abe, H Fuke, S Haino, M Hasegawa, A Horikoshi, K C Kim, M H Lee, Y Makida, S Matsuda, J W Mitchell, A A Moiseev, J Nishimura, M Nozaki, R Orito, J F Ormes, K Sakai, M Sasaki, E S Seo, R E Streitmatter, J Suzuki, K Tanaka, N Thakur, T Yamagami, A Yamamoto, T Yoshida, K Yoshimura
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2007
Subjects:
McMurdo Station
Antarc*
Antarctica
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1073.8823
http://alpha.sinp.msu.ru/%7Epanov/Lib/Papers/CRMAGNET/BESS-Polar-2008-ICRC-I.pdf
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Summary:Abstract: The Search for antimatter in the galactic cosmic radiation is one of the main scientific objectives of the Balloon-borne Experiment with a Superconducting Spectrometer (BESS). A flatter antiproton spectrum below the secondary production peak at 2 GeV might suggest possible novel antiproton sources, such as evaporating black-holes or decaying super symmetric particles. The BESS-Polar experiment is designed as a highly transparent magnetic rigidity spectrometer that can precisely detect antiprotons down to energies of 0.1 GeV were a potential excess of primary antiprotons over the secondary production might be more apparent. The BESS-Polar instrument had its first successful balloon flight in December 2004, from McMurdo Station in Antarctica. During the 8.5-day long flight 900 million events were recorded. In this paper, we report antiproton and proton spectra as well as the search for antihelium.

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