New results from RENO and future RENO-50 project

by Seon-Hee Seo (Seoul National University)

Monday 14 Dec 2015, 11:00 → 12:00 Europe/Zurich

503/1-001 - Council Chamber (CERN)

RENO was the first reactor neutrino experiment taking data using two identical detectors in 2011.
After our first measurement of the smallest neutrino mixing angle theta₁₃ with 4.9 sigma (220 days) in 2012,we have obtained new results using 500 days data with a rate+shape analysis method and we find that sin²(2 theta₁₃) = 0.082 +/- 0.009(stat.) +/- 0.007(sys.) and |dm²_ee| = [2.61 +/- 0.21(stat.) +/- 0.23(sys.)] x 10^-3 eV².  
The increased event statistics, reduced not only our statistical uncertainties but also greatly reduce our systematic uncertainties since they are estimated from data not MC.  The relatively large value of theta₁₃ allows searching for neutrino mass ordering and leptonic CP violation phase  angle measurement.  We plan to build a multi-purpose RENO-50 detector (18 kton liquid scintillator).  
One of the main goals of RENO-50 is to determine mass ordering, which is very challenging.

CERNEPSeminar14.12.2015.pdf

Seo_RENO_CERN2015-1.pdf