期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP01(2016)163
关键词
Oscillation; Electroweak interaction; Neutrino Detectors and Telescopes; Flavor physics
资金
- CEA
- CNRS/IN2P3
- computer centre CCIN2P3
- LabEx UnivEarthS in France [ANR-11-IDEX-0005-02]
- Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT)
- Japan Society for the Promotion of Science (JSPS)
- Department of Energy
- National Science Foundation of the United States
- U.S. Department of Energy through the Nuclear Science and Security Consortium [DE-NA0000979]
- Ministerio de Economia y Competitividad (MINECO) of Spain
- Max Planck Gesellschaft
- Deutsche Forschungsgemeinschaft DFG
- Transregional Collaborative Research Center [TR27]
- excellence cluster Origin and Structure of the Universe
- Maier-Leibnitz-Laboratorium Garching in Germany
- Russian Academy of Science
- Kurchatov Institute
- RFBR (the Russian Foundation for Basic Research)
- Brazilian Ministry of Science, Technology and Innovation (MCTI)
- Financiadora de Estudos e Projetos (FINEP)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Sao Paulo Research Foundation (FAPESP)
- Brazilian Network for High Energy Physics (RENAFAE) in Brazil
- Grants-in-Aid for Scientific Research [15J11799, 25105001, 25105003, 13F03320] Funding Source: KAKEN
- Direct For Mathematical & Physical Scien
- Division Of Physics [1505858] Funding Source: National Science Foundation
The Double Chooz collaboration presents a measurement of the neutrino mixing angle theta(13) using reactor (nu) over bar (e) observed via the inverse beta decay reaction in which the neutron is captured on hydrogen. This measurement is based on 462.72 live days data, approximately twice as much data as in the previous such analysis, collected with a detector positioned at an average distance of 1050m from two reactor cores. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties. Accidental coincidences, the dominant background in this analysis, are suppressed by more than an order of magnitude with respect to our previous publication by a multi-variate analysis. These improvements demonstrate the capability of precise measurement of reactor (nu) over bar (e) without gadolinium loading. Spectral distortions from the (nu) over bar (e) reactor flux predictions previously reported with the neutron capture on gadolinium events are confirmed in the independent data sample presented here. A value of sin(2) 2 theta(13) = 0.095(0.039)(+0.039)(stat+syst) is obtained from a fit to the observed event rate as a function of the reactor power, a method insensitive to the energy spectrum shape. A simultaneous fit of the hydrogen capture events and of the gadolinium capture events yields a measurement of sin(2) 2 theta(13) = 0.088 +/- 0.033(stat+syst).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据