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	Nonthermal cosmic rays during big bang nucleosynthesis to solve the lithium problem
	Kang,Ming-Ming1,2; Hu,Yang3; Hu,Hong-Bo4,5; Zhu,Shou-Hua6,7,8
刊名	The astrophysical journal
	2019-03-05
卷号	873期号:1
关键词	Dark matter Early universe Primordial nucleosynthesis
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab0178
英文摘要	Abstract the discrepancy between the theoretical prediction of primordial lithium abundances and astronomical observations is called the lithium problem. we assume that during big bang nucleosynthesis (bbn), nucleons can gain energy and deviate from thermal equilibrium, namely bbn cosmic rays (bbncrs). bbncr primary spectra are uncertain and the coulomb energy-loss processes are neglected; however, we suppose a steady state of bbncr spectra referring to the galactic cosmic ray spectra observed today, to see constraints on bbncrs, for example, the amount and energy range, not sticking to the explicit shape of the spectra. such extra contributions from bbncrs can explain the discrepancy, for both li-7 and li-6, and will change the deuterium abundance by only a little. the allowed parameter space of such an amount of nonthermal particles and the energy range are shown. the hypothesis is stable regardless of the cross-section uncertainty of relevant reactions and the explicit shape of the energy spectrum.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-873-1-AB0178
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2175727
专题	高能物理研究所
作者单位	1.College of Physical Science and Technology, Sichuan University, Chengdu, Sichuan 610065, People’s Republic of China 2.Key Laboratory of Radiation Physics and Technology of Ministry of Education, Sichuan University, Chengdu, Sichuan 610065, People’s Republic of China 3.College of Arts and Sciences, Shanghai Maritime University, Shanghai 201306, People’s Republic of China; yanghu@shmtu.edu.cn 4.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 5.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 6.Institute of Theoretical Physics & State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People’s Republic of China 7.Collaborative Innovation Center of Quantum Matter, Beijing 100871, People’s Republic of China 8.Center for High Energy Physics, Peking University, Beijing 100871, People’s Republic of China
推荐引用方式 GB/T 7714	Kang,Ming-Ming,Hu,Yang,Hu,Hong-Bo,et al. Nonthermal cosmic rays during big bang nucleosynthesis to solve the lithium problem[J]. The astrophysical journal,2019,873(1).
APA	Kang,Ming-Ming,Hu,Yang,Hu,Hong-Bo,&Zhu,Shou-Hua.(2019).Nonthermal cosmic rays during big bang nucleosynthesis to solve the lithium problem.The astrophysical journal,873(1).
MLA	Kang,Ming-Ming,et al."Nonthermal cosmic rays during big bang nucleosynthesis to solve the lithium problem".The astrophysical journal 873.1(2019).

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