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CERN to Gran Sasso; An ideal distance for superbeam?

Hisakazu Minakata, Hiroshi Nunokawa

hep-pharXiv:hep-ph/0111131

Abstract

We use the CP trajectory diagram as a tool for pictorial representation of the genuine CP and the matter effects to explore the possibility of an in situ simultaneous measurement of δand the sign of Δm213. We end up with a low-energy conventional superbeam experiment with a megaton-class water Cherenkov detector and baseline length of about 700 km. A picturesque description of the combined ambiguity which may arise in simultaneous determination of θ13 and the above two quantities is given in terms of CP trajectory diagram.

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