Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non equilibrium spectra of degenerate relic neutrinos   We calculate the exact kinetic evolution of cosmic neutrinos until complete
decoupling, in the case when a large neutrino asymmetry exists. While not
excluded by present observations, this large asymmetry can have relevant
cosmological consequences and in particular may be helpful in reconciling
Primordial Nucleosynthesis with a high baryon density as suggested by the most
recent observations of the Cosmic Microwave Background Radiation. By solving
numerically the Boltzmann kinetic equations for the neutrino distribution
functions, we find the momentum-dependent corrections to the equilibrium
spectra and briefly discuss their phenomenological implications.

13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math