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Late-decaying Q-ball with BBN lifetime
Wang, F; Yang, JM; Yang, JM , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
2005
发表期刊NUCLEAR PHYSICS B
ISSN0550-3213
卷号709期号:40910页码:409-418
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.
部门归属CCAST, World Lab, Beijing 100080, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Flat Directions Dark-matter Baryogenesis Light Wmap
学科领域Physics
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收录类别SCI
WOS记录号WOS:000227312200017
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13860
专题理论物理所1978-2010年知识产出
通讯作者Yang, JM , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
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GB/T 7714
Wang, F,Yang, JM,Yang, JM , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.. Late-decaying Q-ball with BBN lifetime[J]. NUCLEAR PHYSICS B,2005,709(40910):409-418.
APA Wang, F,Yang, JM,&Yang, JM , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China..(2005).Late-decaying Q-ball with BBN lifetime.NUCLEAR PHYSICS B,709(40910),409-418.
MLA Wang, F,et al."Late-decaying Q-ball with BBN lifetime".NUCLEAR PHYSICS B 709.40910(2005):409-418.
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