CERN to Gran Sasso; An ideal distance for superbeam?

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 \delta and the sign of \Delta m^2_{13}. 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 \theta_{13} and the above two quantities is given in terms of CP trajectory diagram.

Comments: A minor correction in Fig. 1. 3 pages with 3 postscript figures. Talk presented at 7th International Workshop on Topics in Astroparticle and Underground Physics (TAUP2001), Laboratori Nazionali del Gran Sasso, Italy, September 8-12, 2001