Recent Results from RENO

TL;DR

RENO's recent results from 1500 days of data provide updated measurements of neutrino oscillation parameters, confirming the 5 MeV excess correlates with reactor power, advancing understanding of reactor neutrino behavior.

Contribution

This paper reports the latest measurements of neutrino oscillation parameters from RENO with an expanded data set, including spectral analysis and the observed 5 MeV excess dependency.

Findings

Measured $ heta_{13}$ and $igtriangleup m^2_{ee}$ with improved precision.

Confirmed the 5 MeV excess correlates with reactor power.

Provided spectral measurements over 1500 live days.

Abstract

RENO (Reactor Experiment for Neutrino Oscillation) is the reactor neutrino experiment which has been taking data from August 2011 with two identical near and far detectors at Hanbit Nuclear Power Plant, Yonggwang, Korea. Using 1,500 live days of data, $\sin^2 2\theta_{13}$ and $|\Delta m^2_{ee}|$ are updated using spectral measurements: $\sin^2 2\theta_{13} = 0.086 \pm 0.006 ({\rm stat.}) \pm 0.005 ({\rm syst.})$ and $|\Delta m^2_{ee}| = 2.61+0.15-0.16 ({\rm stat.}) \pm 0.09 ({\rm syst.}) (\times 10^{-3} {\rm eV^2})$. The 5 MeV excess dependency on the reactor thermal power rate is again clearly observed with the increased data set.