Probing neutrino parameters with a Two-Baseline Beta-beam set-up

Details Probing neutrino parameters with a Two-Baseline Beta-beam set-up Probing neutrino parameters with a Two-Baseline Beta-beam set-up

2008-11-12

arxiv.org/abs/0811.1828v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 2 figures, and 1 table. To appear in the proceedings of the 10th International Workshop on Neutrino Factories, Super

Scientific paper

We discuss the prospects of exploring the neutrino mass parameters with a CERN based Beta-beam experiment using two different detectors at two different baselines. The proposed set-up consists of a 50 kton iron calorimeter (ICAL) at a baseline of around 7150 km which is roughly the magic baseline, e.g., ICAL@INO, and a 50 kton Totally Active Scintillator Detector at a distance of 730 km, e.g., at Gran Sasso. We take 8B and 8Li source ions with a boost factor $\gamma$ of 650 for the magic baseline while for the closer detector we consider 18Ne and 6He ions with a range of Lorentz boosts. We find that the locations of the two detectors complement each other leading to an exceptional high sensitivity. With $\gamma=650$ for 8B/8Li and $\gamma=575$ for 18Ne/6He and total luminosity corresponding to $5\times (1.1\times 10^{19})$ and $5\times (2.9\times 10^{19})$ useful ion decays in neutrino and antineutrino modes respectively, we find that the two-detector set-up can probe maximal CP violation and establish the neutrino mass ordering if $\sin^22\theta_{13}$ is $1.8 \times 10^{-5}$ and $4.6 \times 10^{-5}$, respectively, or more. The sensitivity reach for $\sin^22\theta_{13}$ itself is $5.3 \times 10^{-5}$. CP violation can be discovered for 64% of the possible $\delta_{CP}$ values for $\sin^22\theta_{13} \geq 8\times 10^{-5}$.

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