@article{d5707a6374704619a955bba9ce3d7114,
title = "Search for antihelium: Progress with BESS",
abstract = " In 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 1.4 TV 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 240 GV. 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 1-500 GV, and 0.6-20 GV, among 7 × 10 4 events taken with BESS-TeV, and 8 × 10 6 events taken with BESS-Polar, respectively.",
keywords = "Antihelium, Antimatter, BESS, BESS-Polar, BESS-TeV, Cosmic ray",
author = "M. Sasaki and S. Haino and K. Abe and H. Fuke and T. Hams and Kim, {K. C.} and Lee, {M. H.} and Y. Makida and S. Matsuda and Mitchell, {J. W.} and Moiseev, {A. A.} and J. Nishimura and M. Nozaki and S. Orito and Ormes, {J. F.} and T. Sanuki and Seo, {E. S.} and Y. Shikaze and Streitmatter, {R. E.} and J. Suzuki and K. Tanaka and T. Yamagami and A. Yamamoto and T. Yoshida and K. Yoshimura",
note = "Funding Information: The authors thank NASA and the Columbia Scientific Balloon Facility (CSBF) for their professional and skillful work in carrying out the BESS flights. They also thank ISAS and KEK for their continuous support and encouragement for the BESS experiment. They would especially like to thank Dr. T. Taniguchi for his kind advice and cooperation in development of the drift chambers. This experiment was supported by Grant-in-Aid for Scientific Research (12047206, 12047226 and 13001004) from the Ministry of Education, Culture, Sport, Science and Technology, in Japan, and was supported by a NASA Grant RTOP-188-05-10-01 in USA. This research was performed while some of the authors (M. Sasaki and T. Hams) held a National Research Council Research Associateship Award at NASA/GSFC.",
year = "2008",
month = aug,
day = "5",
doi = "10.1016/j.asr.2007.09.012",
language = "English",
volume = "42",
pages = "450--454",
journal = "Life sciences and space research",
issn = "0273-1177",
publisher = "Elsevier Limited",
number = "3",
}