Sterile Neutrino Search at the NEOS Experiment Highly Cited Paper

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Title
Sterile Neutrino Search at the NEOS Experiment
Author(s)
Ko, YJ; Kim, BR; Kim, JY; Han, BY; Jang, CH; Eun Ju Jeon; Joo, KK; Kim, HJ; Kim, HS; Yeongduk Kim; Jaison Lee; Lee, JY; Moo Hyun Lee; YooMin Oh; Hyang Kyu Park; Park, HS; Kang Soon Park; Seo, KM; Siyeon, K; Sun, GM
Publication Date
2017-03
Journal
PHYSICAL REVIEW LETTERS, v.118, no.12, pp.12180 -
Publisher
AMER PHYSICAL SOC
Abstract
An experiment to search for light sterile neutrinos is conducted at a reactor with a thermal power of 2.8 GW located at the Hanbit nuclear power complex. The search is done with a detector consisting of a ton of Gd-loaded liquid scintillator in a tendon gallery approximately 24 m from the reactor core. The measured antineutrino event rate is 1976 per day with a signal to background ratio of about 22. The shape of the antineutrino energy spectrum obtained from the eight-month data-taking period is compared with a hypothesis of oscillations due to active-sterile antineutrino mixing. No strong evidence of 3 + 1 neutrino oscillation is found. An excess around the 5 MeV prompt energy range is observed as seen in existing longer-baseline experiments. The mixing parameter sin(2)2 theta(14) is limited up to less than 0.1 for Delta m(41)(2) ranging from 0.2 to 2.3 eV(2) with a 90% confidence level. © 2017 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/4185
ISSN
0031-9007
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > Journal Papers (저널논문)
Files in This Item:
PhysRevLett.118.121802.pdfDownload

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