Sanjib Kumar Agarwalla, Suprabh Prakash, S. Uma Sankar
Recent measurement of a moderately large value of theta13 signifies an important breakthrough in establishing the standard three flavor oscillation picture of neutrinos. It has opened up exciting possibilities for current and future neutrino oscillation experiments. Current experiments are now poised to probe the impact of full three flavor effects to discover neutrino mass hierarchy, CP violation and octant of theta23. However, they can do so only for favorable ranges of parameters at limited C.L. Hence, future facilities are mandatory to cover the entire parameter space at unprecedented C.L. In their first phase, these experiments will have a very limited reach for CP violation discovery. Therefore, for them, the first step would be to focus on hierarchy and octant measurements. In this letter, we explore the capabilities of LBNE and LBNO, whose large matter effects will enable them to settle these two issues. LBNO has a \gtrsim 10 sigma hierarchy discovery even for the most unfavorable combination of neutrino parameters. The hierarchy reach of LBNE is more limited. In particular, if theta23 happens to be in the lower octant, then even a 3 sigma discrimination would not be possible for LBNE in its first stage, for the most unfavorable values of deltaCP. If the current experiments find a hint that the parameter combination is unfavorable, then LBNE should increase their exposure. Regarding the octant, the first stage of LBNO has a 4 sigma discovery potential and that of LBNE has 3 sigma.
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http://arxiv.org/abs/1304.3251
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