Measurement of Reactor Antineutrino Oscillation Amplitude and Frequency at RENO

被引：122

作者：

Bak, G. ^{[1
]}

Choi, J. H. ^{[2
]}

Jang, H. I. ^{[8
]}

Jang, J. S. ^{[3
]}

Jeon, S. H. ^{[9
]}

Joo, K. K. ^{[1
]}

Ju, K. ^{[5
]}

Jung, D. E. ^{[9
]}

Kim, J. G. ^{[9
]}

Kim, J. H. ^{[9
]}

Kim, J. Y. ^{[1
]}

Kim, S. B. ^{[7
]}

Kim, S. Y. ^{[7
]}

Kim, W. ^{[6
]}

Kwon, E. ^{[7
]}

Lee, D. H. ^{[7
]}

Lee, H. G. ^{[7
]}

Lee, Y. C. ^{[7
]}

Lim, I. T. ^{[1
]}

Moon, D. H. ^{[1
]}

Pac, M. Y. ^{[2
]}

Park, Y. S. ^{[1
]}

Rott, C. ^{[9
]}

Seo, H. ^{[7
]}

Seo, J. W. ^{[9
]}

Seo, S. H. ^{[7
]}

Shin, C. D. ^{[1
]}

Yang, J. Y. ^{[7
]}

Yoo, J. ^{[4
,5
]}

Yu, I. ^{[9
]}

机构：

[1] Chonnam Natl Univ, Inst Universe & Elementary Particles, Gwangju 61186, South Korea

[2] Dongshin Univ, Inst High Energy Phys, Naju 58245, South Korea

[3] Gwangju Inst Sci & Technol, GIST Coll, Gwangju 61005, South Korea

[4] Inst for Basic Sci Korea, Daejeon 34047, South Korea

[5] Korea Adv Inst Sci & Technol, Dept Phys, Daejeon 34141, South Korea

[6] Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea

[7] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea

[8] Seoyeong Univ, Dept Fire Safety, Gwangju 61268, South Korea

[9] Sungkyunkwan Univ, Dept Phys, Suwon 16419, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 20期

基金：

新加坡国家研究基金会;

关键词：

NEUTRON FISSION-PRODUCTS; SPECTRA; PU-239;

D O I：

10.1103/PhysRevLett.121.201801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The RENO experiment reports more precisely measured values of theta(13) and vertical bar Delta m(ee)(2)vertical bar using similar to 2200 live days of data. The amplitude and frequency of reactor electron antineutrino ((nu) over bar (e)) oscillation are measured by comparing the prompt signal spectra obtained from two identical near and far detectors. In the period between August 2011 and February 2018, the far (near) detector observed 103 212 (850 666) (nu) over bar (e) candidate events with a background fraction of 4.8% (2.0%). A clear energy and baseline dependent disappearance of reactor (nu) over bar (e) is observed in the deficit of the measured number of (nu) over bar (e). Based on the measured far-to-near ratio of prompt spectra, we obtain sin(2)2 theta(13) = 0.0896 +/- 0.0048(stat) +/- 0.0047(syst) and vertical bar Delta m(ee)(2)vertical bar = [2.68 +/- 0.12(stat) +/- 0.07(syst)] x 10(-3) eV(2).

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