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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 KC Kim A Kusumoto MH Lee Y Makida S Matsuda Y Matsukawa JW Mitchell A Moiseev J Nishimura M Nozaki R Orito S Orito JF Ormes K Sakai T Sanuki M Sasaki ES Seo Y Shikaze R Shinoda RE Streitmatter J Suzuki K Tanaka N Thakur T Yamagami T Yoshida K Yoshimura |
| Institution: | 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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