Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Double parton correlations in mesons within AdS/QCD soft-wall models: a
  first comparison with lattice data   Double parton distribution functions (dPDFs), entering the double parton
scattering (DPS) cross section, are unknown fundamental quantities encoding new
interesting properties of hadrons. Here, the pion dPDFs are investigated within
different holographic QCD quark models in order to access their basic features.
Results of the calculation,s obtained within the AdS/QCD soft-wall approach,
have been compared with predictions of lattice QCD evaluations of the pion
two-current correlation functions. The present analysis confirms that double
parton correlations, affecting dPDFs, are very important and not direct
accessible from generalised parton distribution functions and electromagnetic
form factors. The comparison between lattice data and quark model calculations
unveils the relevance of the contributions of high partonic Fock states in the
pion. Nevertheless, by using a complete general procedure, results of lattice
QCD have been used, for the first time, to estimate the mean value of the so
called $\sigma_{eff}$, a relevant experimental observable for DPS processes. In
addition, the results of the first calculations of the $\rho$ meson dPDFs are
discussed in order to make predictions.

23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga