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Journal of High Energy Physics

, 2016:111 | Cite as

Discovery potential of T2K and NOvA in the presence of a light sterile neutrino

  • Sanjib Kumar Agarwalla
  • Sabya Sachi Chatterjee
  • Arnab Dasgupta
  • Antonio Palazzo
Open Access
Regular Article - Theoretical Physics

Abstract

We study the impact of one light sterile neutrino on the prospective data expected to come from the two presently running long-baseline experiments T2K and NOvA when they will accumulate their full planned exposure. Introducing for the first time, the bi-probability representation in the 4-flavor framework, commonly used in the 3-flavor scenario, we present a detailed discussion of the behavior of the v μ v e and \( {\overline{v}}_{\mu}\to {\overline{v}}_e \) transition probabilities in the 3+1 scheme. We also perform a detailed sensitivity study of these two experiments (both in the stand-alone and combined modes) to assess their discovery reach in the presence of a light sterile neutrino. For realistic benchmark values of the mass-mixing parameters (as inferred from the existing global short-baseline fits), we find that the performance of both these experiments in claiming the discovery of the CP-violation induced by the standard CP-phase \( \delta \) 13 = \( \delta \) and the neutrino mass hierarchy get substantially deteriorated. The exact loss of sensitivity depends on the value of the unknown CP-phase \( \delta \) 14. Finally, we estimate the discovery potential of total CP-violation (i.e., induced simultaneously by the two CP-phases \( \delta \) 13 and \( \delta \) 14), and the capability of the two experiments of reconstructing the true values of such CP-phases. The typical (1\( \sigma \) level) uncertainties on the reconstructed phases are approximately 400 for \( \delta \) 13 and 500 for \( \delta \) 14.

Keywords

Neutrino Physics Beyond Standard Model 

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) 2016

Authors and Affiliations

  • Sanjib Kumar Agarwalla
    • 1
  • Sabya Sachi Chatterjee
    • 1
  • Arnab Dasgupta
    • 1
  • Antonio Palazzo
    • 2
    • 3
  1. 1.Institute of Physics, Sachivalaya MargBhubaneswarIndia
  2. 2.Dipartimento Interateneo di Fisica “Michelangelo Merlin”BariItaly
  3. 3.Istituto Nazionale di Fisica, Nucleare (INFN), Sezione di BariBariItaly

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