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Cosmic rays during BBN as origin of Lithium problem
Kang MM(康铭明); Kang, MM; 胡红波;Hu, Y; Hu, HB; Zhu, SH
2012
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
期号5页码:11
摘要There may be non-thermal cosmic rays during big-bang nucleosynthesis (BBN) epoch (dubbed as BBNCRs). This paper investigated whether such BBNCRs can be the origin of Lithium problem or not. It can be expected that BBNCRs flux will be small in order to keep the success of standard BBN (SBBN). With favorable assumptions on the BBNCR spectrum between 0.09-4 MeV, our numerical calculation showed that extra contributions from BBNCRs can account for the Li-7 abundance successfully. However Li-6 abundance is only lifted an order of magnitude, which is still much lower than the observed value. As the deuteron abundance is very sensitive to the spectrum choice of BBNCRs, the allowed parameter space for the spectrum is strictly constrained. We should emphasize that the acceleration mechanism for BBNCRs in the early universe is still an open question. For example, strong turbulent magnetic field is probably the solution to the problem. Whether such a mechanism can provide the required spectrum deserves further studies.
关键词big bang nucleosynthesis physics of the early universe particle acceleration
学科领域Astronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2012/05/011
收录类别SCI
WOS记录号WOS:000305415200012
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224380
专题粒子天体物理中心
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Kang MM,Kang, MM,胡红波;Hu, Y,et al. Cosmic rays during BBN as origin of Lithium problem[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(5):11.
APA 康铭明,Kang, MM,胡红波;Hu, Y,Hu, HB,&Zhu, SH.(2012).Cosmic rays during BBN as origin of Lithium problem.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(5),11.
MLA 康铭明,et al."Cosmic rays during BBN as origin of Lithium problem".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .5(2012):11.
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