Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-06-04
Nucl.Phys.B646:321-349,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
Latex2e, 36 pages, using epsfig
Scientific paper
10.1016/S0550-3213(02)00894-5
We notice that looking for $\nu_e \to \nu_\tau$ at the same time as $\nu_e \to \nu_\mu$ oscillations could significantly help to reduce the errors in the leptonic CP-violating phase $\delta$ measurement. We show how the $\nu_e \to \nu_\mu$ (``golden'') and $\nu_e \to \nu_\tau$ (``silver'') transitions observed at an OPERA-like 2 Kton lead-emulsion detector at L = 732 Km, in combination with the $\nu_e \to \nu_\mu$ transitions observed at a 40 Kton magnetized iron detector with a baseline of L = 3000 Km, strongly reduce the so-called $(\theta_{13}, \delta)$ ambiguity. We also show how a moderate increase in the OPERA-like detector mass (4 Kton instead of 2 Kton) completely eliminates the clone regions even for small values of $\theta_{13}$.
Donini Andrea
Meloni Daniela
Migliozzi Pasquale
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