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.
Search for antihelium: Progress with BESS
Advances in Space Research ; 42 , 3 ; 450-454
2007-09-04
5 pages
Article (Journal)
Electronic Resource
English
Cosmic ray , Antimatter , Antihelium , BESS , BESS-TeV , BESS-Polar
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