  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 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 theta23, 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 NOvA. Stand-alone LBNO setup with a 10 kt detector has a mass hierarchy
discovery reach of more than 7 sigma, for the lowest allowed value of
sin^2theta23(true) = 0.34. This result is valid for any choice of true deltaCP
and hierarchy. LBNE10, in combination with T2K and NOvA, can achieve 3 sigma
hierarchy discrimination for any choice of deltaCP, sin^2theta23, and
hierarchy. The same combination can provide a 3 sigma octant resolution for
sin^2theta23(true) leq 0.44 or for sin^2theta23(true) geq 0.58 for all values
of deltaCP(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 deltaCP at 2 sigma
confidence level. In case of LBNE10, CP coverage at 3 sigma can be enhanced
from 3% to 43% by combining T2K and NOvA data, assuming sin^2theta23(true) =
0.5. For LBNO setup, CP violation discovery at 3 sigma is possible for 46%
values of true deltaCP if we add the data from T2K and NOvA.

High Energy Physics - Phenomenology;High Energy Physics - Experiment