Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Realistic Tri-Bi-Maximal neutrino mixing   We propose a generalized version of the Tri-Bi-Maximal (TBM) ansatz for
lepton mixing, leading to non-zero reactor angle $\theta_{13}$ and CP
violation. The latter is characterized by two CP phases. The Dirac phase
affecting neutrino oscillations is nearly maximal ($\delta_{CP} \sim \pm
\pi/2$), while the Majorana phase implies narrow allowed ranges for the
neutrinoless double beta decay amplitude. The solar angle $\theta_{12}$ lies
nearly at its TBM value, while the atmospheric angle $\theta_{23}$ has the TBM
value for maximal $\delta_{CP}$. Neutrino oscillation predictions can be tested
in present and upcoming experiments.

32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int