Research Article
Study on the Neutrino Oscillation with a Next Generation
Medium-Baseline Reactor Experiment
Chang Dong Shin and Kyung Kwang Joo
Department of Physics, Chonnam National University, Gwangju 500-757, Republic of Korea
Correspondence should be addressed to Kyung Kwang Joo; kkjoo@chonnam.ac.kr
Received February ; Accepted April ; Published May
Academic Editor: eocharis Kosmas
Copyright © C. D. Shin and K. K. Joo. is is an open access article distributed under the Creative Commons Attribution
License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly
cited. e publication of this article was funded by SCOAP
.
For over y years, reactor experiments have played an important role in neutrino physics, in both discoveries and precision
measurements. One of the methods to verify the existence of neutrino is the observation of neutrino oscillation phenomena.
Electron antineutrinos emitted from a reactor provide the measurement of the small mixing angle
13
, providing rich programs of
neutrino properties, detector development, nuclear monitoring, and application. Using reactor neutrinos, future reactor neutrino
experiments, more precise measurements of
12
,
2
12
, and mass hierarchy will be explored. e precise measurement of
13
would
be crucial for measuring the CP violation parameters at accelerators. erefore, reactor neutrino physics will assist in the complete
understanding of the fundamental nature and implications of neutrino masses and mixing. In this paper, we investigated several
characteristics of RENO-, which is a future medium-baseline reactor neutrino oscillation experiment, by using the GloBES
simulation package.
1. Introduction
Over the last decade, great progress has been made in
understanding the neutrino sector of elementary particle
physics. e discovery of neutrino oscillations is a direct
indication of physics beyond the standard model. It provides
a unique new window to explore physics at the Grand
Unication Energy scale. While the absolute neutrino mass
has not yet been measured, neutrino oscillation implies that
neutrinos have a nonzero mass and are mixed together.
Neutrino oscillations are described by the three Pontecorvo-
Maki-Nakagawa-Sakata (PMNS) mixing angles (
12
,
23
,and
13
), one CP violating phase, and two independent mass
squared dierences (
2
31
,
2
21
)[, ]. e mixing angles,
(
12
,
23
,and
13
), have been measured using atmospheric,
solar, accelerator beam, and reactor neutrino experiments.
Among the mixing angles, (
12
,
23
), the values are relatively
well measured.
12
was measured using solar neutrinos and
the KamLAND experiment [, ], while
23
was measured
using atmospheric neutrinos and the long baseline accel-
erator KK experiment [, ]. However, for the
13
value,
until the year , the best upper limit was set by the
Chooz reactor antineutrino disappearance experiment [].
e reactor experiments (Double Chooz, Daya Bay, and
RENO) have measured
13
and provide accurate information
on sin
2
2
13
[–]. In addition, reactor neutrino experiments
make accurate measurements of reactor neutrino uxes and
spectra to search for sterile neutrinos [–]. Also, future
accelerator based neutrino experiments will provide a rich
program of measuring CP violation and matter eects.
However, in the long baseline experiments, degeneracies and
parameter correlations occur among
13
,theCPviolation
phase (
CP
), neutrino mass hierarchy, and
23
.epossibility
of measuring the CP violation eect can be fullled only if
the value of
13
is precisely measured. Combining the results
from the accelerator and reactor-based experiments could
oer the rst glimpse of
CP
without the necessity for long
running accelerators with antineutrino beams [].
Aer the RENO experiment, RENO collaboration plans
to construct an underground detector of RENO- consist-
ing of , tons of ultralow-radioactivity unloaded liquid
scintillator (LS) and high quantum eciency (QE) photo-
multiplier tubes (PMTs). At ∼ km from the reactor center,
the neutrino oscillation takes place maximally due to
12
.An
Hindawi Publishing Corporation
Advances in High Energy Physics
Volume 2014, Article ID 320287, 8 pages
http://dx.doi.org/10.1155/2014/320287