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Journal of High Energy Physics

, 2019:143 | Cite as

Uncertainty in the reactor neutrino spectrum and mass hierarchy determination

  • E. CiuffoliEmail author
  • J. Evslin
  • H. Mohammed
Open Access
Regular Article - Experimental Physics

Abstract

One of the challenges that must be overcome in order to determine the neutrino mass hierarchy using reactor neutrinos is the theoretical uncertainty in the unoscillated reactor neutrino spectrum: this is one of the reasons why, recently, it was proposed to add a near detector to the JUNO experiment. A model-independent treatment of the spectrum uncertainty will be discussed, as well as the effect that it will have on the final result. Moreover, since the neutrino spectrum depends on the chemical composition of the fuel, the spectra at the near and far detectors will be different, because they will receive neutrinos from different cores. Taking into account the time evolution of the chemical composition of the fuel in the reactor core, it is possible to reconstruct the far detector spectrum from the near detector data. We will show that the method used to reconstruct the spectrum can affect sensitivity to the mass hierarchy, however if the near detector is large enough the difference will be negligible.

Keywords

Neutrino Detectors and Telescopes (experiments) Oscillation 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited

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Copyright information

© The Author(s) 2019

Authors and Affiliations

  1. 1.Institute of Modern PhysicsLanzhouChina
  2. 2.University of the Chinese Academy of SciencesBeijingChina

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