Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vector meson form factors and their quark-mass dependence   The electromagnetic form factors of vector mesons are calculated in an
explicitly Poincar\'e covariant formulation, based on the Dyson--Schwinger
equations of QCD, that respects electromagnetic current conservation, and
unambiguously incorporates effects from vector meson poles in the quark-photon
vertex. This method incorporates a 2-parameter effective interaction, where the
parameters are constrained by the experimental values of chiral condensate and
$f_{\pi}$. This approach has successfully described a large amount of
light-quark meson experimental data, e.g. ground state pseudoscalar masses and
their electromagnetic form factors; ground state vector meson masses and strong
and electroweak decays. Here we apply it to predict the electromagnetic
properties of vector mesons. The results for the static properties of the
$\rho$-meson are: charge radius $<r_\rho^2 > = 0.54 {\rm fm}^2$, magnetic
moment $\mu = 2.01$, and quadrupole moment ${\cal Q} = -0.41$. We investigate
the quark mass dependence of these static properties and find that our results
at the charm quark mass are in agreement with recent lattice simulations. The
charge radius decreases with increasing quark mass, but the magnetic moment is
almost independent of the quark mass.

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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: math
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The categories of this paper are: hep-lat
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The categories of this paper are: physics
4
The categories of this paper are: cond-mat