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Search for primordial antiparticles with BESS |
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| Authors: | A. Yamamoto K. Abe H. Fuke S. Haino T. Hams M. Hasegawa A. Horikoshi K.C. Kim A. Kusumoto M.H. Lee Y. Makida S. Matsuda Y. Matsukawa J.W. Mitchell A. Moiseev J. Nishimura M. Nozaki R. Orito S. Orito J.F. Ormes K. Sakai T. Sanuki M. Sasaki E.S. Seo Y. Shikaze R. Shinoda R.E. Streitmatter J. Suzuki K. Tanaka N. Thakur T. Yamagami T. Yoshida K. Yoshimura |
| Affiliation: | 1. High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801, Japan;2. Kobe University, Kobe, Hyogo 657-850, Japan;3. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 229-8510, Japan;4. NASA Goddard Space Flight Center (NASA/GSFC), Greenbelt, MD 20771, USA;5. University of Maryland, College Park, MD 20742, USA;6. The University of Tokyo, Bunkyo, Tokyo 113-0044, Japan;g University of Denver, Denver, CO 80208, USA |
| Abstract: | The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) has been carried out to search for primordial antiparticles in cosmic rays. In ten flights from 1993 to 2004, it measured the cosmic-ray antiproton spectrum in the energy range 0.1–4.2 GeV at various solar activity conditions. It also searched for antideuterons and antihelium nuclei, and it made precise measurement of cosmic-ray particle spectra. The BESS program has been extended to long duration balloon (LDB) flights in Antarctica (BESS-Polar) with the goal of achieving unprecedented sensitivity in the search for primordial antiparticles. This report describes recent results from BESS and progress of the BESS-Polar program. |
| Keywords: | Antiparticle Antiproton Cosmic-ray Primordial black hole Superconducting spectrometer Long duration balloon flight BESS |
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