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题名: New interpretation of matter-antimatter asymmetry based on branes and possible observational consequences
作者: 蔡荣根 ;  Li, Tong ;  Li, Xue-Qian ;  Wang, Xun
刊名: PHYSICAL REVIEW D
出版日期: 2007
卷号: 76, 期号:10, 页码:-
关键词: ALPHA-MAGNETIC-SPECTROMETER ;  EXTRA DIMENSIONS ;  VIOLATION ;  COSMOLOGY ;  UNIVERSE ;  FIELDS ;  RADION ;  BULK ;  LAW
学科分类: Physics
通讯作者: Cai, RG , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China
英文摘要: Motivated by the alpha-magnetic-spectrometer (AMS) project, we assume that after the big bang or inflation epoch, antimatter was repelled onto one brane which is separated from our brane where all the observational matter resides. It is suggested that CP may be spontaneously broken, the two branes would correspond to ground states for matter and antimatter, respectively. Generally a complex scalar field which is responsible for the spontaneous CP violation, exists in the space between the branes. The matter and antimatter on the two branes attract each other via gravitational force, meanwhile the scalar field causes a Casimir effect to result in a repulsive force against the gravitation. We find that the Casimir force is much stronger than the gravitational force, as long as the separation of the two branes is small. Thus at early epoch after the big bang, the two branes were closer and then have been separated by the Casimir repulsive force from each other. The trend will continue until the separation is sufficiently large and then the gravitational force observed in our four-space would obviously deviate from the Newton's universal gravitational law. We suppose that there is a potential barrier at the brane boundary, which is similar to the surface tension for a water membrane. The barrier prevents the matter (antimatter) particles from entering the space between two branes and jump from one brane to another. However, by the quantum tunneling, a sizable antimatter flux may come to our brane and be observed by the AMS. In this work by considering two possible models, i.e. the naive flat space-time and Randall-Sundrum models, and using the observational data on the visible matter in our universe as inputs, we derive the antimatter flux which comes to our detector in the nonrelativistic approximation and make a rough numerical estimate of possible numbers of antihelium at AMS.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000251327400025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5639
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Cai, Rong-Gen,Li, Tong,Li, Xue-Qian,et al. New interpretation of matter-antimatter asymmetry based on branes and possible observational consequences[J]. PHYSICAL REVIEW D,2007,76(10):-.
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