The role of Near Detector and the recent results from Daya Bay

被引：0

作者：

Wu, Q. ^{[1
]}

机构：

[1] Shandong Univ, Jinan 250100, Shandong, Peoples R China

来源：

WORKSHOP ON NEUTRINO INTERACTIONS, SYSTEMATIC UNCERTAINTIES AND NEAR DETECTOR PHYSICS (CETUP* 2014) | 2015年 / 1680卷

关键词：

neutrino oscillation; reactor neutrino; Daya Bay; theta(13); NEUTRINO OSCILLATIONS; SEARCH;

D O I：

10.1063/1.4931881

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The Daya Bay reactor neutrino experiment was designed to measure theta(13) with an unpresesent sensitivity of sin(2)2 theta(13) down to 0.01 at 90% C.L. This is achieved with careful site selection and proper detector design. Placement of detector systems close to each of the two reactor clusters not only reduces nu(e) flux systematic uncertainties, but also cancels the common detection uncertainty when functional identical detectors are used in the near and far sites. With 621 days of data, the relative measurement of the (nu) over bar (e) rate and spectrum between near and far detectors gives sin(2)theta(13) = 0.084+0.005 and vertical bar Delta m(ee)(2)vertical bar = 2.44(-0.11)(+0.10) x 10(-3)eV(2). The (nu) over bar (e) data sample tagged by neutron capture on hydrogen provides an independent measurement of sin2 theta(13) by the rate dificit of the far site. With 2 near sites and a far site, Daya Bay experiment collects (nu) over bar (e) interactions with multiple baselines, which allows a search for light sterile neutrinos based on the relative spectral difference between three experimental sites. A measurement of the absolute reactor antineutrino flux was also performed thanks to the large (nu) over bar (e) sample collected.

引用

页数：10

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