| Project/Area Number |
06402008
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
|
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| Research Institution | National Laboratory for High Energy Physics |
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Principal Investigator |
YAMAMOTO Akira National Laboratory for High Energy Physics・Cryogenics Center, Prof., 低温センター, 教授 (30113418)
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| Co-Investigator(Kenkyū-buntansha) |
MAKIDA Yasuhiro National Laboratory for High Energy Physics・Phys. Dept., Res.Associate, 物理研究部, 助手 (30199658)
NOZAKI Mitsuaki Kobe University・Faculty of Science Dept., Prof., 理学部, 教授 (10156193)
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| Project Period (FY) |
1994 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥34,600,000 (Direct Cost: ¥34,600,000)
Fiscal Year 1996: ¥9,700,000 (Direct Cost: ¥9,700,000)
Fiscal Year 1995: ¥12,300,000 (Direct Cost: ¥12,300,000)
Fiscal Year 1994: ¥12,600,000 (Direct Cost: ¥12,600,000)
|
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| Keywords | The Universe / Cosmic Ray / Origin of the Universe / Anti Matter / Anti Particle / Elementary Particles / C-P Violation |
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| Research Abstract |
The Balloon-borne Experiment with a Superconducting magnet Spectrometer (BESS) has been carried out in a collaboration amongst National Laboratory for High Energy Physics, University of Tokyo, Kobe University, Institute for Space and Astronautical Science. The ballooning has been supported by NASA.
Search for cosmic-ray antiprotons has been perfomed, and more than 40 cosmic-ray antiprotons have been first detected in an energy range of 0.5-1 GeV with the identification by a direct mass measurement.
Search for antihelium has been also made and no candidates have been detected in a rigidity range below 16 GV.
Those results have been published or to be published in Physical Review Letter or The Astrophysical Journal.
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