Neutrino mass hierarchy and ${\theta }_{13}$ with a magic baseline beta-beam experiment

Abstract

We underscore the physics advantage of an experiment where neutrinos produced in a beta-beam facility at CERN are observed in a large magnetized iron calorimeter (ICAL) at the India-based Neutrino Observatory (INO). The CERN-INO distance is close to the so-called "magic" baseline which helps evade some of the parameter degeneracies and allows for a better measurement of the neutrino mass hierarchy and ${\theta }_{13}$. We expound the possibility of using radioactive ${}^{8}B$ and ${}^{8}Li$ as the source isotopes for the $\nue$ and $\anue$ beta-beam, respectively, and show that very good sensitivity to both the mass hierarchy and ${\theta }_{13}$ is possible with a boost $\gamma$ in the 250-500 ballpark.

arXiv comment32 pages, 21 eps figures, 5 tables, references added, version to appear in Nucl.Phys.B

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