Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How astrophysical neutrino sources could be used for early measurements
  of neutrino mass hierarchy and leptonic CP phase   We discuss the possible impact of astrophysical neutrino flux measurements at
neutrino telescopes on the neutrino oscillation program of reactor experiments
and neutrino beams. We consider neutrino fluxes from neutron sources, muon
damped sources, and pion sources, where we parameterize the input from these
sources in terms of the flux ratio $R=\phi_\mu/(\phi_e+\phi_\tau)$ which can be
extracted from the muon track to shower ratio in a neutrino telescope. While it
is difficult to obtain any information from this ratio alone, we demonstrate
that the dependence on the oscillation parameters is very complementary to the
one of reactor experiments and neutrino beams. We find that for large values of
$\sin^2 2 \theta_{13}$, a measurement of R with a precision of about 20% or
better may not only improve the measurement of the leptonic CP phase, but also
help the determination of the mass hierarchy. In some cases, early information
on $\delta_{CP}$ may even be obtained from Double Chooz and an astrophysical
flux alone without the help of superbeams. For small values of $\sin^2 2
\theta_{13}$, we find that using the information from an astrophysical neutrino
flux could eliminate the octant degeneracy better than reactor experiments and
beams alone. Finally, we demonstrate that implementing an additional observable
based on the electromagnetic to hadronic shower ratio at a neutrino telescope
(such as at higher energies) could be especially beneficial for pion beam
sources.

16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int