# $θ {13}$, $δ$ and the neutrino mass hierarchy at a $γ=350$ double baseline Li-B $β$-Beam - High Energy Physics - Phenomenology

$θ {13}$, $δ$ and the neutrino mass hierarchy at a $γ=350$ double baseline Li-B $β$-Beam - High Energy Physics - Phenomenology - Download this document for free, or read online. Document in PDF available to download.

Abstract: We consider a $\beta$-Beam facility where $^8$Li and $^8$B ions areaccelerated at $\gamma = 350$, accumulated in a 10 Km storage ring and letdecay, so as to produce intense $\bar u e$ and $ u e$ beams. These beamsilluminate two iron detectors located at $L \simeq 2000$ Km and $L \simeq 7000$Km, respectively. The physics potential of this setup is analysed in fulldetail 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 ofthe atmospheric mass difference can be identified, regardless of the truehierarchy, for $\sin^2 2 \theta {13} \geq 4\times10^{-4}$; and, CP-violationcan 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 $|\delta| \sim 90^\circ$.

Author: ** Pilar Coloma, Andrea Donini, Enrique Fernandez-Martinez, Jacobo Lopez-Pavon**

Source: https://arxiv.org/