Moon shadow by cosmic rays under the influence of geomagnetic field and search for antiprotons at multi-TeV energies
文献类型：期刊论文
| 作者 | Amenomori, M.; Ayabe, S.; Bi, X. J.; Chen, D.; Cui, S. W.; Danzengluobu; Ding, L. K.; Ding, X. H.; Feng, C. F.; Feng, Zhaoyang |
| 刊名 | ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2007-09-01 |
| 卷号 | 28页码:137-142 |
| 关键词 | cosmic rays air shower anti-matter observation and data analysis simulations |
| ISSN号 | 0927-6505 |
| DOI | 10.1016/j.astropartphys.2007.05.002 |
| 英文摘要 | We have observed the shadowing of galactic cosmic ray flux in the direction of the moon, the so-called moon shadow, using the Tibet-III air shower array operating at Yangbajing (4300 in a.s.l.) in Tibet since 1999. Almost all cosmic rays are positively charged; for that reason, they are bent by the geomagnetic field, thereby shifting the moon shadow westward. The cosmic rays will also produce an additional shadow in the eastward direction of the moon if cosmic rays contain negatively charged particles, such as antiprotons, with some fraction. We selected 1.5 x 10(10) air shower events with energy beyond about 3 TeV from the dataset observed by the Tibet-III air shower array and detected the moon shadow at similar to 40 sigma level. The center of the moon was detected in the direction away from the apparent center of the moon by 0.23 degrees to the west. Based on these data and a full Monte Carlo simulation, we searched for the existence of the shadow produced by antiprotons at the multi-TeV energy region. No evidence of the existence of antiprotons was found in this energy region. We obtained the 90% confidence level upper limit of the flux ratio of antiprotons to protons as 7% at multi-TeV energies. (C) 2007 Elsevier B.V. All rights reserved. |
| WOS关键词 | AIR-SHOWER ARRAY ; CLOSED GALAXY ; GAMMA-RAYS ; FLUX ; ELEMENTS ; NUCLEI ; MODEL |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000250355200012 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://119.78.100.186/handle/113462/27169]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Hibino, K. |
| 作者单位 | 1.Kanagawa Univ, Fac Engn, Yokohama, Kanagawa 2218686, Japan 2.Hirosaki Univ, Dept Phys, Hirosaki, Aomori 0368561, Japan 3.Saitama Univ, Dept Phys, Saitama 3388570, Japan 4.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 5.Yokohama Natl Univ, Fac Engn, Yokohama, Kanagawa 2408501, Japan 6.Hebei Normal Univ, Dept Phys, Shijiazhuang 050016, Peoples R China 7.Tibet Univ, Dept Math & Phys, Lhasa 850000, Peoples R China 8.Shandong Univ, Dept Phys, Jinan 250100, Peoples R China 9.SW Jiaotong Univ, Inst Modern Phys, Chengdu 610031, Peoples R China 10.Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China |
| 推荐引用方式 GB/T 7714 | Amenomori, M.,Ayabe, S.,Bi, X. J.,et al. Moon shadow by cosmic rays under the influence of geomagnetic field and search for antiprotons at multi-TeV energies[J]. ASTROPARTICLE PHYSICS,2007,28:137-142. |
| APA | Amenomori, M..,Ayabe, S..,Bi, X. J..,Chen, D..,Cui, S. W..,...&Zhou, X. X..(2007).Moon shadow by cosmic rays under the influence of geomagnetic field and search for antiprotons at multi-TeV energies.ASTROPARTICLE PHYSICS,28,137-142. |
| MLA | Amenomori, M.,et al."Moon shadow by cosmic rays under the influence of geomagnetic field and search for antiprotons at multi-TeV energies".ASTROPARTICLE PHYSICS 28(2007):137-142. |
入库方式： OAI收割
来源：近代物理研究所
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