Optimal β-beam at the CERN-SPS

• DOI: 10.1016/j.nuclphysb.2005.06.037
• Publication Date: 2005-08-12T07:38:26Z
• Authors: J. Burguet-Castell; D. Casper; E. Couce; J.J. Gómez-Cadenas; P. Hernández
• Keywords: High Energy Physics - Phenomenology; 0103 physical sciences; 01 natural sciences; 7. Clean energy

Comment: 22 pages<br/>A $\beta$-beam with maximum $\gamma=150$ (for $\helio$ ions) or $\gamma=250$ (for $\neon$) could be achieved at the CERN-SPS. We study the sensitivity to $\theta_{13}$ and $\delta$ of such a beam as function of $\gamma$, optimizing with the baseline constrained to CERN-Frejus (130 km), and also with simultaneous variation of the baseline. These results are compared to the {\it standard} scenario previously considered, with lower $\gamma=60/100$, and also with a higher $\gamma\sim 350$ option that requires a more powerful accelerator. Although higher $\gamma$ is better, loss of sensitivity to $\theta _{13}$ and $\delta$ is most pronounced for $\gamma$ below 100.<br/>