Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetries and fermion masses   We discuss whether quark, charged lepton and neutrino masses and mixing
angles may be related by an extended flavour and family symmetry group. We show
that current measurements of all fermion masses and mixing angles are
consistent with a combination of an underlying SU(3) family symmetry together
with a GUT symmetry such as SO(10). In this the near bi-maximal mixing observed
in the neutrino sector is directly related to the small mixing observed in the
quark sector, the difference between quark and lepton mixing angles being due
to the see-saw mechanism. Using this connection we make a detailed prediction
for the lepton mixing angles determining neutrino oscillation phenomena.

19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex