Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A_4 model for the quark mass matrices   We propose a model for the quark masses and mixings based on an A_4 family
symmetry. Three scalar SU(2) doublets form a triplet of A_4. The three
left-handed-quark SU(2) doublets are also united in a triplet of A_4. The
right-handed quarks are singlets of A_4. The A_4-symmetric scalar potential
leads to a vacuum in which two of the three scalar SU(2) doublets have
expectation values with equal moduli. Our model makes an excellent fit of the
observed |V_ub/V_cb|. The symmetry CP is respected in the charged gauge
interactions of the quarks.

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The categories of this paper are: physics
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The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
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The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: cs
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The categories of this paper are: nucl-ex