Model-independent (nu)over-bar(e) short-baseline oscillations from reactor spectral ratios

doi:10.1016/j.physletb.2018.04.057

	Model-independent (nu)over-bar(e) short-baseline oscillations from reactor spectral ratios
	Giunti, C; Li YF(李玉峰); Gariazzo, S; Laveder, M; Li, YF
刊名	PHYSICS LETTERS B
	2018
卷号	782 页码:13-21
ISSN号	0370-2693
DOI	10.1016/j.physletb.2018.04.057
文献子类	Article
英文摘要	We consider the ratio of the spectra measured in the DANSS neutrino experiment at 12.7 and 10.7 m from a nuclear reactor. These data give a new model-independent indication in favor of short-baseline (nu) over bar (e) oscillations which reinforce the model-independent indication found in the late 2016 in the NEOS experiment. The combined analysis of the NEOS and DANSS spectral ratios in the framework of 3+1 active-sterile neutrino mixing favor short-baseline (nu) over bar (e) oscillations with a statistical significance of 3.7 sigma. The two mixing parameters sin(2)2 nu ee and Delta m(41)(2) are constrained at 2 sigma a narrow-Delta m(41)(2) island at Delta m(41)(2) similar or equal to 1.3 eV(2), with sin(2)2 nu(ee)= 0.049 +/- 0.023(2 sigma). We discuss the implications of the model-independent NEOS+DANSS analysis for the reactor and Gallium anomalies. The NEOS+DANSS model-independent determination of short-baseline (nu) over bar (e) oscillations allows us to analyze the reactor rates without assumptions on the values of the main reactor antineutrino fluxes and the data of the Gallium source experiments with free detector efficiencies. The corrections to the reactor neutrino fluxes and the Gallium detector efficiencies are obtained from the fit of the data. In particular, we confirm the indication in favor of the need for a recalculation of the (235)Ureactor antineutrino flux found in previous studies assuming the absence of neutrino oscillations. (C) 2018 The Author(s). Published by Elsevier B.V.
电子版国际标准刊号	1873-2445
WOS关键词	NEUTRON FISSION-PRODUCTS ; NUCLEAR-POWER-REACTOR ; ANTINEUTRINO SPECTRA ; SEARCH ; GALLEX ; REANALYSIS ; PLANT ; BUGEY
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000438486900003
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286125]
专题	高能物理研究所_实验物理中心
通讯作者	Li YF(李玉峰)
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Giunti, C,Li YF,Gariazzo, S,et al. Model-independent (nu)over-bar(e) short-baseline oscillations from reactor spectral ratios[J]. PHYSICS LETTERS B,2018,782:13-21.
APA	Giunti, C,李玉峰,Gariazzo, S,Laveder, M,&Li, YF.(2018).Model-independent (nu)over-bar(e) short-baseline oscillations from reactor spectral ratios.PHYSICS LETTERS B,782,13-21.
MLA	Giunti, C,et al."Model-independent (nu)over-bar(e) short-baseline oscillations from reactor spectral ratios".PHYSICS LETTERS B 782(2018):13-21.