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题名: Late-decaying Q-ball with BBN lifetime
作者: Wang, F ;  Yang, JM
刊名: NUCLEAR PHYSICS B
出版日期: 2005
卷号: 709, 期号:40910, 页码:409-418
关键词: FLAT DIRECTIONS ;  DARK-MATTER ;  BARYOGENESIS ;  LIGHT ;  WMAP
学科分类: Physics
通讯作者: Yang, JM , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
部门归属: CCAST, World Lab, Beijing 100080, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: In the Affleck-Dine mechanism of baryogenesis, nontopological solitons called Q-balls can be formed. In this work we propose that such Q-balls decay during the BBN era and study the cosmological consequence of such late decays. We find that the late-decaying baryonic Q-balls with lifetime of about 10(3) s can provide a new developing mechanism for the BBN through a rolling baryon-to-photon ratio eta, which can naturally explain the discrepancy of the BBN prediction with the WMAP data on Li-7 abundance. For the late-decaying leptonic Q-balls with lifetime of about 10(6) s, we find that their decay product, gravitinos, can serve as a dark matter candidate and give an explanation for the approximate equality of dark and baryon matter densities. (C) 2004 Elsevier B.V. All rights reserved.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000227312200017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13860
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:
Wang, F,Yang, JM. Late-decaying Q-ball with BBN lifetime[J]. NUCLEAR PHYSICS B,2005,709(40910):409-418.
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