Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modelling the Off-Shell Dependence of $\pi^{o}- \eta$ Mixing with Quark
  Loops   It is shown that including form factors for the quark-pseudoscalar meson
couplings of the Georgi-Manohar chiral quark model allows one to obtain the
leading off-shell dependence of $\pi^{o}- \eta$ mixing (as predicted by chiral
perturbation theory) from the effect of quark loops on the meson propagators.
Implications for $\rho^{o} - \omega$ mixing and for the effects on meson mixing
contributions to few body charge symmetry breaking observables are also
discussed.

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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
1
The categories of this paper are: cs
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The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci