Target Neutrino Mass Precision for Determining the Neutrino Hierarchy
Cosmology and Nongalactic Astrophysics
2020-04-15 v3 Instrumentation and Methods for Astrophysics
High Energy Physics - Phenomenology
Abstract
Recent works combining neutrino oscillation and cosmological data to determine the neutrino hierarchy found a range of odds in favour of the normal hierarchy. These results arise from differing approaches to incorporating prior knowledge about neutrinos. We develop a hierarchy-agnostic prior and show that the hierarchy cannot be conclusively determined with current data. The determination of the hierarchy is limited by the neutrino mass scale measurement. We obtain a target precision of eV, necessary for conclusively establishing the normal hierarchy with future data.
Cite
@article{arxiv.1907.04331,
title = {Target Neutrino Mass Precision for Determining the Neutrino Hierarchy},
author = {Constance Mahony and Boris Leistedt and Hiranya V. Peiris and Jonathan Braden and Benjamin Joachimi and Andreas Korn and Linda Cremonesi and Ryan Nichol},
journal= {arXiv preprint arXiv:1907.04331},
year = {2020}
}
Comments
v3: Version accepted in Phys Rev D. Minor clarifications and added robustness tests, conclusions unchanged