Ab initio calculations of reactor antineutrino fluxes with exact lepton wave functions

doi:10.1016/j.physletb.2021.136067

	Ab initio calculations of reactor antineutrino fluxes with exact lepton wave functions
	Fang, Dong-Liang 2,3; Li, Yu-Feng 1,4; Zhang, Di 1,4
刊名	PHYSICS LETTERS B
	2021-02-10
卷号	813 页码:9
ISSN号	0370-2693
DOI	10.1016/j.physletb.2021.136067
通讯作者	Li, Yu-Feng(liyufeng@ihep.ac.cn) ; Zhang, Di(zhangdi@ihep.ac.cn)
英文摘要	New ab initio calculations of the isotopic reactor antineutrino fluxes are provided with exact numerical calculations of the lepton wave functions, assuming all the decay branches are allowed GT transitions. We illustrate that the analytical Fermi function and finite size effect each could have the largest spectral deviation of O(10%), whereas the effect of their combination could result in spectral deviations at the level of 5%-10%. Meanwhile, we also find that several forms of the extended charge distributions have negligible effects on the spectral variation. Using the state-of-the-art nuclear databases, compared to usual ab initio calculations using the analytical single beta decay spectrum, our new calculation shows sizable but opposite spectral deviations at the level of 2%-4% for the cumulative antineutrino and electron energy spectra which may partially contribute to the observed spectral excess in the high energy antineutrino range. Finally we observe that the bias of analytical beta decay spectrum approximation is rather universal for all the four fissionable isotopes. (C) 2021 The Author(s). Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[11835013] ; National Natural Science Foundation of China[11775231] ; National Natural Science Foundation of China[12075255] ; Beijing Natural Science Foundation[1192019] ; CAS Center for Excellence in Particle Physics (CCEPP) ; CAS Light of West China Program ; CAS key research program[XDPB09-2] ; National Key Research and Development Program from the Ministry of Science and Technology of China[MOST 2016YFA0400501]
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000614817100035
资助机构	National Natural Science Foundation of China ; Beijing Natural Science Foundation ; CAS Center for Excellence in Particle Physics (CCEPP) ; CAS Light of West China Program ; CAS key research program ; National Key Research and Development Program from the Ministry of Science and Technology of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137940]
专题	中国科学院近代物理研究所
通讯作者	Li, Yu-Feng; Zhang, Di
作者单位	1.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Fang, Dong-Liang,Li, Yu-Feng,Zhang, Di. Ab initio calculations of reactor antineutrino fluxes with exact lepton wave functions[J]. PHYSICS LETTERS B,2021,813:9.
APA	Fang, Dong-Liang,Li, Yu-Feng,&Zhang, Di.(2021).Ab initio calculations of reactor antineutrino fluxes with exact lepton wave functions.PHYSICS LETTERS B,813,9.
MLA	Fang, Dong-Liang,et al."Ab initio calculations of reactor antineutrino fluxes with exact lepton wave functions".PHYSICS LETTERS B 813(2021):9.