Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The stochastic model of neutrino oscillation   Neutrino oscillation is phenomenon of random transition from a flavor state
of neutrino to another, and should obey quantum statistics theory, and
constitutes Markoffian process. The process is depicted by method of CTRW
(continuous time random walk), and the time-evolution formula of flavor
distribution of neutrino beam has been established. The simulation with
Markoffian model for solar and cosmic ray neutrino indicates neutrino
oscillation will arrive at equilibrium flavor distribution of three-fold
maximum if propagation time is long enough, which is consistent to the data of
SK and SNO experiments.

9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph