The Reactor Antineutrino Anomaly

被引：4

作者：

Lasserre, Th ^{[1
]}

机构：

[1] CEA, Irfu, SPP, Ctr Saclay, F-91191 Gif Sur Yvette, France

来源：

12TH INTERNATIONAL CONFERENCE ON TOPICS IN ASTROPARTICLE AND UNDERGROUND PHYSICS (TAUP 2011), PTS 1-6 | 2012年 / 375卷

关键词：

NEUTRON FISSION-PRODUCTS; SPECTRA; OSCILLATIONS; SEARCH; PU-239;

D O I：

10.1088/1742-6596/375/1/042042

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Early 2011 new reactor antineutrino spectra have been provided for U-235, Pu-239, Pu-241, and U-238, increasing the mean flux by about 3 percent. The authors reevaluated the ratio of observed event rate to predicted rate of 19 published experiments at reactor-detector distances below 100 m, found to be 0.943 +/- 0.023. The deviation from unity, significant at 98.6% C.L., is now being refered as 'the reactor antineutrino anomaly'. The compatibility of our results with the existence of a fourth non-standard neutrino state driving neutrino oscillations at short distances is discussed. The combined analysis of reactor data, gallium solar neutrino calibration experiments data disfavors the no-oscillation hypothesis at 99.8% C. L. The oscillation parameters are such that vertical bar Delta m(new)(2)vertical bar > 1.5 eV(2) (95%) and sin(2)(2 theta(new)) = 0.14 +/- 0.08 (95%).

引用

页数：4

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