Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How to Detect Big Bang Relic Neutrinos?   The existence of big bang relic neutrinos - exact analogues of the big bang
relic photons comprising the cosmic microwave background radiation - is a basic
prediction of standard cosmology. At present, the observational evidence for
their existence rests entirely on cosmological measurements, such as the light
elemental abundances, anisotropies in the cosmic microwave background, and the
large-scale matter power spectrum. In this review, we concentrate on the
prospects of more direct, weak interaction based relic neutrino detection
techniques which are sensitive to the cosmic neutrino background near the
present epoch and in our local neighborhood in the universe. In this
connection, we emphasize the necessity to take into account the gravitational
clustering of the relic neutrinos in the cold dark matter halos of our Milky
Way and nearby galaxy clusters.

10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex