Addendum: Neutrino Mass Hierarchy Determination Using Reactor Antineutrinos

TL;DR

This paper updates previous neutrino mass hierarchy studies by incorporating recent large b13b2 measurements, showing that detector requirements can be relaxed for hierarchy determination.

Contribution

It provides revised analysis of reactor neutrino experiments considering new b13b2 data, highlighting reduced detector constraints for hierarchy sensitivity.

Findings

Relaxed energy resolution requirements for hierarchy detection.

Reduced exposure needed due to larger b13b2 value.

Updated sensitivity estimates with recent experimental data.

Abstract

We update our study of neutrino mass hierarchy determination using a high statistics reactor electron anti-neutrino experiment in the light of the recent evidences of a relatively large non-zero value of \theta_{13} from the Daya Bay and RENO experiments. We find that there are noticeable modifications in the results, which allow a relaxation in the detector's characteristics, such as the energy resolution and exposure, required to obtain a significant sensitivity to, or to determine, the neutrino mass hierarchy in such a reactor experiment.