Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrinos as a diagnostic of cosmic ray Galactic/extra-galactic
  transition   Motivated by a recent change in viewing the onset of the extra-galactic
component in the cosmic ray spectrum, we have fitted the observed data down to
$10^{8.6}$ GeV and have obtained the corresponding power emissivity. This
transition energy is well below the threshold for resonant $p\gamma$ absorption
on the cosmic microwave background, and thus source evolution is an essential
ingredient in the fitting procedure. Two-parameter fits in the spectral and
redshift evolution indices show that a standard Fermi $E_i^{-2}$ source
spectrum is excluded at larger than 95% confidence level (CL). Armed with the
primordial emissivity, we follow Waxman and Bahcall to derive the associated
neutrino flux on the basis of optically thin sources. For $pp$ interactions as
the generating mechanism, the neutrino flux exceeds the AMANDA-B10 90%CL upper
limits. In the case of $p\gamma$ dominance, the flux is marginally consistent
with AMANDA-B10 data. In the new scenario the source neutrino flux dominates
over the cosmogenic flux at all energies. Thus, should data from AMANDA-II
prove consistent with the model, we show that IceCube can measure the
characteristic power law of the neutrino spectrum, and thus provide a window on
the source dynamics.

36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math