The Θ13 and δ CP sensitivities of the SPL-Fréjus project revisited
Université Paris-Sud, Laboratoire de l'Accélérateur Linéaire, Bât. 200, 91898, Orsay Cedex, BP 34, France
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Revised: 25 October 2005
Published online: 22 December 2005
An optimization of the CERN SPL beam line has been performed guided by the sensitivities to the Θ13 mixing angle and to the δ CP Dirac CP violating phase. A UNO-like 440 ktons water Čerenkov detector located at 130 km from the target in a new foreseen Fréjus laboratory has been used as a generic detector. Concerning the δ CP independent Θ13 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.
© Springer-Verlag, 2006