Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two Component Theory of Neutrino Flavor Mixing   Neutrino flavor mixing is discussed in terms of two-component coupled
left-handed flavor fields. This is to take into account the fact that the weak
interaction couples only to left-handed fields. The flavor fields are written
through a rotation matrix, as a linear combination of left-handed free fields.
In order to obtain properly normalized wave functions directly from those free
fields, states of mixed helicity have to be considered. Neutrino flavor
oscillation amplitudes are also derived.

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The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
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The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
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The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex