Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrino Phenomenology -- the case of two right handed neutrinos   We make a general analysis of neutrino phenomenology for the case neutrino
masses are generated by the see-saw mechanism with just two right handed
neutrinos. We find general constraints on leptogenesis and lepton flavour
violating processes. We also analyse the predictions following from a
nontrivial texture zero structure.

37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg