CERN-INO magical Beta-beam experiment: A high precision probe for neutrino parameters

TL;DR

This paper explores the potential of a CERN-INO beta-beam experiment with a large magnetized detector to precisely determine neutrino mass hierarchy and mixing angle θ13, independent of CP phase effects.

Contribution

It proposes a novel experimental setup using beta-beam technology and a magnetized iron calorimeter to measure neutrino parameters with high precision and minimal CP phase interference.

Findings

Mass hierarchy can be determined at 3σ if sin^2 2θ13 > 5.6×10^{-4}.

Unambiguous θ13 measurement possible if sin^2 2θ13 > 5.1×10^{-4}.

Results are independent of the true value of δ_{CP}.

Abstract

This talk is an attempt to underscore in detail the physics reach of an experimental set-up where neutrinos produced in a beta-beam facility at CERN would be observed in the proposed large magnetized iron calorimeter detector (ICAL) at the India-based Neutrino Observatory (INO). The "magical" CERN-INO beta-beam set-up offers an excellent avenue to use the "Golden" channel ($\nu_e \to \nu_{\mu}$) oscillation probability for a simultaneous determination of the neutrino mass ordering and $\theta_{13}$ avoiding the impact of the CP phase $\delta_{CP}$ on these measurements. With Lorentz boost $\gamma=650$ and irrespective of the true value of $\delta_{CP}$, the neutrino mass hierarchy could be determined at $3\sigma$ C.L. if $\sin^22\theta_{13}{\rm {(true)}} > 5.6 \times 10^{-4}$ and we can expect an unambiguous signal for $\theta_{13}$ at $3\sigma$ C.L. if $\sin^22\theta_{13}{\rm {(true)}} > 5.1 \times 10^{-4}$ independent of the true neutrino mass hierarchy.