Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Physics potential of neutrino oscillation experiment with a far detector
  in Oki Island along the T2K baseline   Oki Island is located between Japan and Korea along the Tokai-To-Kamioka
(T2K) baseline. The distance from J-PARC to Oki Island is about 653km, which is
twice that of the T2K experiment (L=295km). When the off-axis angle of the
neutrino beam from J-PARC is 3.0^\circ (2.0^\circ) at Super-Kamiokande (SK),
the off-axis beam (OAB) with 1.4^\circ (0.6^\circ) reaches at Oki Island. We
examine physics case of placing a far detector in Oki Island during the T2K
experimental period. We estimate the matter density profile along the
Tokai-to-Oki baseline by using recent seismological measurements. For a
detector of 100kton fiducial volume and 2.5x10^21 POT (protons on target)
exposure for both \nu_\mu and \bar{\nu}_\mu beams, we find that the mass
hierarchy pattern can be distinguished at 3\sigma level if sin^22theta_rct
\equiv 4|U_{e3}|^2(1-|U_{e3}|^2) \gsim 0.09, by observing the electron-like
CCQE (Charged-Current Quasi Elastic) events. The CP phase in the
Maki-Nakagawa-Sakata lepton flavor mixing matrix, \delta_mns, can be
constrained with \pm 20^\circ. As a reference, we repeat the same analysis by
placing the same detector in Korea at L=1000km and OAB=0.5^\circ (T2KK) and
also by placing it at the SK site (T2K_122). The Tokai-to-Kamioka-OKI (T2KO)
sensitivity to the mass hierarchy is about 1/3 (in \Delta \chi^2_min) of T2KK,
while the sensitivity to the phase \delta_mns is similar between T2KO and T2KK.
The T2K_122 option has almost no sensitivity to the mass hierarchy, and cannot
measure the CP phase except when \delta_mns \sim -90^\circ (90^\circ) for the
normal (inverted) hierarchy.

12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg