Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermion masses and symmetry breaking of a U(2) flavour symmetry   We show how a specific sequential breaking pattern of a U(2) flavour symmetry
occurs automatically in a broad framework. The relative orientation in U(2)
space of the spurion fields that breaks the U(2) symmetry is uniquely fixed,
thus determining the form of the fermion mass matrices in a predictive way.

21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg