Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The modern description of semileptonic meson form factors   I describe recent advances in our understanding of the hadronic form factors
governing semileptonic meson transitions. The resulting framework provides a
systematic approach to the experimental data, as a means of extracting
precision observables, testing nonperturbative field-theory methods, and
probing a poorly understood limit of QCD.

22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph