AbstractIn this paper, we report searches for antihelium in cosmic rays using two recently flown magnetic rigidity spectrometers. BESS-TeV had extended rigidity with an MDR of 1.4TV and had a flight duration of one day. BESS-Polar was optimized for collecting power. It was flown for 8.5 days and had an MDR of 240GV. The former flight allows us to explore a previously unexplored rigidity band and the latter flight yields a factor of three improvement in the overall BESS limit. No antihelium candidate was found in the rigidity ranges of 1–500GV, and 0.6–20GV, among 7×104 events taken with BESS-TeV, and 8×106 events taken with BESS-Polar, respectively.


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    Title :

    Search for antihelium: Progress with BESS


    Contributors:
    Sasaki, M. (author) / Haino, S. (author) / Abe, K. (author) / Fuke, H. (author) / Hams, T. (author) / Kim, K.C. (author) / Lee, M.H. (author) / Makida, Y. (author) / Matsuda, S. (author) / Mitchell, J.W. (author)

    Published in:

    Advances in Space Research ; 42 , 3 ; 450-454


    Publication date :

    2007-09-04


    Size :

    5 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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