We consider a $\beta$-Beam facility where $^8$Li and $^8$B ions are accelerated at $\gamma = 350$, accumulated in a 10 Km storage ring and let decay, so as to produce intense $\bar \nu_e$ and $\nu_e$ beams. These beams illuminate two iron detectors located at $L \simeq 2000$ Km and $L \simeq 7000$ Km, respectively. The physics potential of this setup is analysed in full detail as a function of the flux. We find that, for the highest flux ($10 \times 10^{ 18}$ ion decays per year per baseline), the sensitivity to $\theta_{ 13}$ reaches $\sin^2 2 \theta_{ 13} \geq 2 \times10^{ -4}$; the sign of the atmospheric mass difference can be identified, regardless of the true hierarchy, for $\sin^2 2 \theta_{ 13} \geq 4\times10^{ -4}$; and, CP-violation can be discovered in 70% of the $\delta$-parameter space for $\sin^2 2 \theta_{ 13} \geq 10^{ -3}$, having some sensitivity to CP-violation down to $\sin^2 2 \theta_{ 13} \geq 10^{ -4}$ for $|\delta| \sim 90^\circ$.
Categories: hep-ph hep-ex