This DocDB will be archived as of EOB Friday, Aug. 28, 2015,
which no changes
additions can be made to it. The documents will remain available for download and reference. The destination for all new
documents and updates to existing documents for DUNE and LBNF is docs.dunescience.org.
The Long-Baseline Neutrino Experiment (LBNE) is being developed to
provide a unique and world-leading program for the exploration of key
questions at the forefront of particle physics and astrophysics. This
document describes the principal scientific opportunities LBNE is
designed to pursue and the exceptional combination of technical
capabilities and geographical layout that will allow it to make
In a single experiment, LBNE will enable a broad exploration of the
three-flavor neutrino paradigm including observation of the
charge-parity (CP) matter/antimatter symmetry violation in neutrino
flavor mixing, resolution of the neutrino mass hierarchy and
determination of maximal or near-maximal mixing in neutrinos.
LBNE will also pursue searches for proton decay as predicted by Grand
Unified Theories, and explore the dynamics of core-collapse
supernovae, likely dominated in critical phases by unimaginable
densities of neutrinos, through observation of their neutrino bursts,
should any occur in our galaxy during LBNE's operating lifetime.
To achieve its goals, LBNE is conceived around three central
components: (1) a new, intense wide-band neutrino source at Fermi
National Accelerator Laboratory, (2) a fine-grained near neutrino
detector installed just downstream of the source, and (3) a massive
liquid argon time-projection chamber deployed as a far detector deep
underground at the Sanford Underground Research Facility, located
$\sim$1,300~km from the neutrino source, a distance (baseline) that
presents the optimal sensitivity to neutrino charge-parity symmetry
violation and mass hierarchy effects.
Excellent resolution on the direction of atmospheric neutrinos will
allow a determination of the mass hierarchy independent of the beam
measurements. In addition, the high interaction rate available in the
near detector will enable the study of neutrino interactions with
The LBNE concept has matured over more than a decade into a
well-developed design made even more relevant by recent mixing
parameter measurements. Its realization through international
partnerships will produce exciting discoveries about the most abundant
known matter particle and fundamental forces that shaped our Universe
from its first moments of creation.