Latest Results of the STEREO Experiment: a Search for a Sterile Neutrino at Very Short Baseline

被引：0

作者：

Blanchet, Adrien ^{[1
]}

机构：

[1] CEA Paris Saclay, Irfu, DPhN, F-91191 Gif Sur Yvette, France

来源：

16TH INTERNATIONAL CONFERENCE ON TOPICS IN ASTROPARTICLE AND UNDERGROUND PHYSICS (TAUP 2019) | 2020年 / 1468卷

关键词：

D O I：

10.1088/1742-6596/1468/1/012204

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The increasingly precise study of antineutrinos spectra from reactors has revealed a deviation between the prediction and the measurements, which could indicate the existence of a new neutrino. This new neutrino state would not couple with the weak interaction (a sterile neutrino) and its mass would be around 1 eV/c(2). The STEREO experiment aims at testing this hypothesis using a gadolinium-loaded liquid scintillator in a segmented neutrino target at 10 meters distance from the compact core of the ILL research reactor, in Grenoble (France). The hypothesis of an oscillation towards a light sterile neutrino is tested by performing a relative comparison of measured (nu) over bar (e) spectra between cells. The data recorded during 119 (211) days of reactor turned on (off) are compatible with the null oscillation hypothesis and reject the original best-fit of the RAA at 99.8 % C.L. The analysis efforts are now pointing towards measurements involving absolute predictions in flux and shape of the antineutrino spectrum.

引用

页数：4

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