Moon shadow by cosmic rays under the influence of geomagnetic field and search for antiprotons at multi-TeV energies

	Moon shadow by cosmic rays under the influence of geomagnetic field and search for antiprotons at multi-TeV energies
	Amenomori, M. ; Ayabe, S. ; Bi, X. J. ; Chen, D. ; Cui, S. W. ; Danzengluobu, ; Ding, L. K. ; Ding, X. H. ; Feng, C. F. ; Feng, Z ; Feng, Z. Y. ; Gao, X. Y. ; Geng, Q. ; Guo, H. W. ; He, H. H. ; He, M. ; Hibino, K. ; Hotta, N. ; Hu, H. B. ; Huang, J. ; Huang, Q. ; Jia, H. Y. ; Kajino, F. ; Kasahara, K. ; Katayose, Y. ; Kato, C. ; Kawata, K. ; Labaciren, ; Le, G. M. ; Li, A. F. ; Li, J. Y. ; Lou, Y. Q. ; Lu, H. ; Lu, S. L. ; Meng, X. R. ; Mizutani, K. ; Mu, J. ; Munakata, K. ; Nagai, A. ; Nanjo, H. ; Nishizawa, M. ; Ohnishi, M. ; Ohta, I. ; Onuma, H. ; Ouchi, T. ; Ozawa, S. ; Ren, J. R. ; Saito, T. ; Saito, T. Y. ; Sakata, M. ; Sako, T. K. ; Sasaki, T. ; Shibata, M. ; Shiomi, A. ; Shirai, T. ; Sugimoto, H. ; Takita, M. ; Tan, Y. H. ; Tateyama, N. ; Torii, S. ; Tsuchlya, H. ; Udo, S. ; Wang, B.S. ; Wang, H. ; Wang, X. ; Wang, Y. G. ; Wu, H. R. ; Xue, L. ; Yamamoto, Y. ; Yan, C. T. ; Yang, X. C. ; Yasue, S. ; Yu, G. C. ; Yuan, A. F. ; Yuda, T. ; Zhang, H. M. ; Zhang, J. L. ; Zhang, N. J. ; Zhang, X. Y. ; Zhang, Y. ; Zhaxisangzhu, ; Zhou, X. X.
刊名	Astroparticle Physics
	2007
卷号	28 期号:1 页码:137-142
关键词	cosmic rays air shower anti-matter observation and data analysis simulations air-shower array closed galaxy gamma-rays flux elements nuclei model
ISSN号	0927-6505
通讯作者	北京8701信箱
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.
收录类别	SCI
原文出处	http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TJ1-4NRK4G6-1-9&_cdi=5297&_user=1999492&_pii=S0927650507000734&_orig=search&_coverDate=09%2F30%2F2007&_sk=999719998&view=c&wchp=dGLzVzb-zSkzS&md5=cdc0be3c2d76e9eeb6fdd3bca74a88f7&ie=/sdarticle.pdf
语种	英语
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/1707]
专题	国家空间科学中心_其他部室
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(1):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(1),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 28.1(2007):137-142.