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European Physical Journal C 45 (2006) 643-657
The $\theta _{13}$ and $\delta _{CP}$ sensitivities of the SPL-Fréjus project revisited
Jean-Eric Campagne1, Antoine Cazes1

An optimization of the CERN SPL beam line has been performed guided by the sensitivities to the \theta_{13} mixing angle and to the \delta_{CP} Dirac CP violating phase. A UNO-like 440 ktons water Cerenkov detector located at 130 km from the target in a new foreseen Frejus laboratory has been used as a generic detector. Concerning the \delta_{CP} independent \theta_{13} sensitivity, a gain of about 20% may be reached using a 3.5 GeV proton beam with a 40 m long, 2 m radius decay tunnel compared to the up to now considered 2.2 GeV beam energy and 20 m long, 1 m radius decay tunnel. This may motivate new machine developments to upgrade the nominal SPL proton beam energy.
1 :  LAL - Laboratoire de l'Accélérateur Linéaire
Physique/Physique des Hautes Energies - Expérience
neutrino oscillations – neutrino beams – CERN SPL – CP violation – PMNS matrix
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