Method for Determination of $|U_{e3}|$ in Neutrino Oscillation Appearance Experiments

Details Method for Determination of $|U_{e3}|$ in Neutrino Oscillation Appearance Experiments Method for Determination of $|U_{e3}|$ in Neutrino Oscillation Appearance Experiments

2001-12-28

arxiv.org/abs/hep-ph/0112345v2

Phys.Lett. B528 (2002) 245-252

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 3 figures, minor corrections, final version to appear in PLB

Scientific paper

10.1016/S0370-2693(02)01231-5

We point out that determination of the MNS matrix element |U_{e3}| = s_{13} in long-baseline \nu_{\mu} \to \nu_e neutrino oscillation experiments suffers from large intrinsic uncertainty due to the unknown CP violating phase \delta and sign of \Delta m^2_{13}. We propose a new strategy for accurate determination of $\theta_{13}$; tune the beam energy at the oscillation maximum and do the measurement both in neutrino and antineutrino channels. We show that it automatically resolves the problem of parameter ambiguities which involves \delta, \theta_{13}, and the sign of \Delta m^2_{13}.

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