Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heavy Quark Masses, Mixing Angles, and Spin-Flavour Symmetry   In a series of three lectures, I review the theory and phenomenology of heavy
quark masses and mixing angles and the status of their determination. In
addition, I give an introduction to heavy quark symmetry, with the main
emphasis on the development of heavy quark effective field theory and its
application to obtain a model-independent determination of $|V_{cb}|$.

17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph