Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non Thermal Features in the Cosmic Neutrino Background   I review some of the basic information on the Cosmic Neutrino Background
momentum distribution. In particular, I discuss how present data from several
cosmological observables such as Big Bang Nucleosynthesis, Cosmic Microwave
Background and Large Scale Structure power spectrum constrain possible
deviations from a standard Fermi-Dirac thermal distribution.

18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph