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High Energy Physics - Phenomenology

arXiv:hep-ph/0504061 (hep-ph)
[Submitted on 8 Apr 2005 (v1), last revised 31 Dec 2005 (this version, v2)]

Title:Solving the neutrino parameter degeneracy by measuring the T2K off-axis beam in Korea

Authors:Kaoru Hagiwara (KEK and SOKENDAI), Naotoshi Okamura (KIAS), Ken-ichi Senda (KEK and SOKENDAI)
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Abstract: The T2K neutrino oscillation experiment will start in 2009. In this experiment the center of the neutrino beam from J-PARC at Tokai village will go through underground beneath Super-Kamiokande, reach the sea level east of Korean shore, and an off-axis beam at $0.5^{\circ}$ to $1.0^{\circ}$ can be observed in Korea. We study physics impacts of putting a 100 kt-level Water \cerenkov detector in Korea during the T2K experimental period. For a combination of the $3^{\circ}$ off-axis beam at SK with baseline length L = 295 km and the $0.5^{\circ}$ off-axis beam in the east coast of Korea at L = 1000 km, we find that the neutrino mass hierarchy (the sign of $m^2_{3} - m^2_1$) can be resolved and the CP phase of the MNS unitary matrix can be constrained uniquely at 3-$\sigma$ level when \sin^2 2\theta_{\rm rct} $ \ge 0.06 $.
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Experiment (hep-ex)
Report number: KEK-TH-1011, KIAS-P05024
Cite as: arXiv:hep-ph/0504061
  (or arXiv:hep-ph/0504061v2 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/0504061
Journal reference: Phys.Lett.B637:266-273,2006; Erratum-ibid.B641:491,2006
Related DOI: https://doi.org/10.1016/j.physletb.2006.04.041 https://doi.org/10.1016/j.physletb.2006.09.003

Submission history

From: Kenichi Senda [view email]
[v1] Fri, 8 Apr 2005 18:21:02 UTC (992 KB)
[v2] Sat, 31 Dec 2005 15:57:32 UTC (996 KB)
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