Determining the Sign of \Delta_{31} by Future Long Baseline and Reactor Experiments

TL;DR

This paper proposes a method to determine the neutrino mass hierarchy sign using data from upcoming long baseline and reactor neutrino experiments within the next decade.

Contribution

It introduces a procedure to identify the sign of 1 using simulated data from T2K, NOA, and Double-CHOOZ experiments, advancing neutrino mass hierarchy determination.

Findings

Method successfully distinguishes the mass hierarchy sign in simulations.

Combines data from long baseline and reactor experiments for improved accuracy.

Provides a framework for analyzing future experimental data.

Abstract

We study the determination of neutrino mass hierarchy, through neutrino experiments within the next ten years. The T2K neutrino oscillation experiment will start in 2009. In the experiment the high intensity \nu_{\mu} beam from JHF is directed to Super-Kamiokande (SK) detector 295 km away. The NO\nu A (off axies neutrino oscillation) experiment is being planned, with the \nu_{\mu} beam from Fermi-Lab directed to a site 610km away, which is 0,7,14 milliradian off-axies. Both the above experiments will measure \nu_{\mu}\to\nu_{e} oscillation probability. The double-CHOOZ experiment under construction detects \bar{\nu_{e}}s emitted by nuclear reactors both through a near detector (150m) and a far detector (1.05 Km) and measure \bar{\nu_{e}}\to\bar{\nu_{e}} survival probability. In this paper, we outline a procedure to determine the sign of \Delta_{31} from the simulated data of the above experiments.