Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pion radiative weak decays in nonlocal chiral quark models   We analyze the radiative pion decay pi+ -> e+ nu_e gamma within nonlocal
chiral quark models that include wave function renormalization. In this
framework we calculate the vector and axial-vector form factors FV and FA at
q^2=0 --where q^2 is the (e+ \nu_e) squared invariant mass-- and the slope a of
FV(q^2) at q^2 -> 0. The calculations are carried out considering different
nonlocal form factors, in particular those taken from lattice QCD evaluations,
showing a reasonable agreement with the corresponding experimental data. The
comparison of our results with those obtained in the (local) NJL model and the
relation of FV and a with the form factor in pi^0 -> gamma* gamma decays are
discussed.

23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
2
The categories of this paper are: math