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Effects of cosmological constant on motion of UHECR particles
Chen, SX; Chang Z(常哲); Chang, Z
2005
发表期刊SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY
卷号48期号:1页码:#REF!
通讯作者Chen, SX (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
文章类型Article
摘要Recent astronomical observations manifest that about two-thirds of the whole energy in the Universe is contributed by a small positive cosmological constant Lambda (> 0). Then, an asymptotically de Sitter spacetime is premised naturally. However, physics in the de Sitter spacetime is very different from that in the Minkowski spacetime. As the first step, a covariant formalism of the kinematics in the de Sitter spacetime is presented here. By solving exactly the equations of motion for a field, we obtain the dispersion relation of a free particle. It is noticed that the dispersion relation is dependent on the degree of freedom of angular momentum of the particle. We show the threshold anomaly of the ultra high energy cosmic ray disappears naturally in the framework of the de Sitter kinematics.
关键词ultrahigh energy cosmic ray cosmological constant curved spacetime
学科领域Physics
DOI10.1360/04yw0131
收录类别SCI
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000228224000005
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225705
专题理论物理室
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Chen, SX,Chang Z,Chang, Z. Effects of cosmological constant on motion of UHECR particles[J]. SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,2005,48(1):#REF!.
APA Chen, SX,常哲,&Chang, Z.(2005).Effects of cosmological constant on motion of UHECR particles.SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY,48(1),#REF!.
MLA Chen, SX,et al."Effects of cosmological constant on motion of UHECR particles".SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY 48.1(2005):#REF!.
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