Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holographic glueball structure   We derive and systematically analyze scalar glueball correlation functions in
both the hard-wall and dilaton soft-wall approximations to holographic QCD. The
dynamical content of the holographic correlators is uncovered by examining
their spectral density and by relating them to the operator product expansion,
a dilatational low-energy theorem and a recently suggested two-dimensional
power correction associated with the short-distance behavior of the heavy-quark
potential. This approach provides holographic estimates for the three
lowest-dimensional gluon condensates or alternatively their Wilson
coefficients, the two leading moments of the instanton size distribution in the
QCD vacuum and an effective UV gluon mass. A remarkable complementarity between
the nonperturbative physics of the hard- and soft-wall correlators emerges, and
their ability to describe detailed QCD results can be assessed quantitatively.
We further provide the first holographic estimates for the decay constants of
the 0++ glueball and its excitations. The hard-wall background turns out to
encode more of the relevant QCD physics, and its prediction f ~ 0.8-0.9 GeV for
the phenomenologically important ground state decay constant agrees inside
errors with recent QCD sum rule and lattice results.

23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex