New results from RENO and future RENO-50 project

Kim, S. B. (2016) New results from RENO and future RENO-50 project. Il nuovo cimento C, 39 (4). pp. 1-8. ISSN 1826-9885

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RENO (Reactor Experiment for Neutrino Oscillation) has obtained a more precise value of the smallest mixing angle θ13 and the first result on neutrino squared-mass difference |Δm2 ee| from an energy- and baseline-dependent disappear-ance of reactor electron antineutrinos ( νe) using 500 days of data. Based on the ratio of inverse-beta-decay (IBD) prompt spectra measured between two identical far and near detectors, we obtain sin2 2θ13 =0 .082±0.009(stat.)±0.006(syst.) and |Δm2 ee| = [2 .62+0.21 −0.23(stat.)+0.12 −0.13(syst.)]×10−3 eV2. An excess of reactor antineutrinos near 5MeV is observed in the measured prompt spectrum with respect to the most commonly used models. The excess is found to be consistent with coming from reactors. A future reactor experiment of RENO-50 is proposed to determine the neutrino mass hierarchy and to make highly precise measurements of θ12,Δm221, and |Δm2 ee|.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 16 Nov 2020 20:22
Last Modified: 16 Nov 2020 20:22

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