Optimal β-beam at the CERN-SPS
In this talk, based on the work [J. Burguet-Castell et al., Nucl. Phys. B 725 (2005) 306], we present an analysis of the sensitivity to the mixing angle θ 13 and the CP-violating phase δ that could be achieved by a β-beam experiment based at the SPS accelerator at CERN. We estimate the optimal γ boost of the 6He and 18Ne ions for the proposed baseline CERN-Frejus (130 km), and also perform a simultaneous optimization of the ion boost and the baseline. A possible improvement of the current SPS accelerator is considered as well. After comparing the sensitivities of all relevant setups, we conclude that a β-beam running at the maximum acceleration achievable by the SPS, γ = 150 / 250 , and wit…
Physics at a future Neutrino Factory and super-beam facility
The conclusions of the Physics Working Group of the international scoping study of a future Neutrino Factory and super-beam facility (the ISS) are presented. The ISS was carried by the international community between NuFact05, (the 7th International Workshop on Neutrino Factories and Superbeams, Laboratori Nazionali di Frascati, Rome, June 21-26, 2005) and NuFact06 (Ivine, California, 24{30 August 2006). The physics case for an extensive experimental programme to understand the properties of the neutrino is presented and the role of high-precision measurements of neutrino oscillations within this programme is discussed in detail. The performance of second generation super-beam experiments, …
Optimal β-beam at the CERN-SPS
A β-beam with maximum (for 6He ions) or (for 18Ne) could be achieved at the CERN-SPS. We study the sensitivity to and δ of such a beam as function of γ, optimizing with the baseline constrained to CERN–Frejus (130 km), and also with simultaneous variation of the baseline, for a fixed ion flux. These results are compared to the standard scenario previously considered, with lower , and also with a higher option that requires a more powerful accelerator. We conclude that the sensitivity to CP violation and increases significantly with γ if the baseline is increased proportionally, while for the CERN–Frejus scenario the dependence on γ is mild provided γ is above 100.