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Exploring the three flavor effects with future superbeams using liquid argon detectors

  • Sanjib Kumar AgarwallaEmail author
  • Suprabh Prakash
  • S. Uma Sankar
Open Access
Article

Abstract

Recent measurement of a moderately large value of θ 13 signifies an important breakthrough in establishing the standard three flavor oscillation picture of neutrinos. It has provided an opportunity to explore the sub-dominant three flavor effects in present and future long-baseline experiments. In this paper, we perform a comparative study of the physics reach of two future superbeam facilities, LBNE and LBNO in their first phases of run, to resolve the issues of neutrino mass hierarchy, octant of θ 23, and leptonic CP violation. We also find that the sensitivity of these future facilities can be improved significantly by adding the projected data from T2K and NOνA. Stand-alone LBNO setup with a 10 kt detector has a mass hierarchy discovery reach of more than 7σ, for the lowest allowed value of sin2 θ 23(true) = 0.34. This result is valid for any choice of true δ CP and hierarchy. LBNE10, in combination with T2K and NOνA, can achieve 3σ hierarchy discrimination for any choice of δ CP, sin2 θ 23, and hierarchy. The same combination can provide a 3σ octant resolution for sin2 θ 23(true) ≤ 0.44 or for sin2 θ 23(true) ≥ 0.58 for all values of δ CP(true). LBNO can give similar results with 10 kt detector mass. In their first phases, both LBNE10 and LBNO with 20 kt detector can establish leptonic CP violation for around 50% values of true δ CP at 2σ confidence level. In case of LBNE10, CP coverage at 3σ can be enhanced from 3% to 43% by combining T2K and NOνA data, assuming sin2 θ 23(true) = 0.5. For LBNO setup, CP violation discovery at 3σ is possible for 46% values of true δ CP if we add the data from T2K and NOνA.

Keywords

Neutrino Physics CP violation 

Notes

Open Access

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Copyright information

© The Author(s) 2014

Authors and Affiliations

  • Sanjib Kumar Agarwalla
    • 1
    Email author
  • Suprabh Prakash
    • 2
  • S. Uma Sankar
    • 2
  1. 1.Institute of Physics, Sachivalaya Marg, Sainik School PostBhubaneswarIndia
  2. 2.Department of PhysicsIndian Institute of Technology BombayMumbaiIndia

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