Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modeling dihadron fragmentation functions   We present a model for dihadron fragmentation functions, describing the
fragmentation of a quark into two unpolarized hadrons. We tune the parameters
of our model to the output of the PYTHIA event generator for two-hadron
semi-inclusive production in deep inelastic scattering at HERMES. Once the
parameters of the model are fixed, we make predictions for other unknown
fragmentation functions and for a single-spin asymmetry in the azimuthal
distribution of pi+ pi- pairs in semi-inclusive deep inelastic scattering on a
transversely polarized target at HERMES and COMPASS. Such asymmetry could be
used to measure the quark transversity distribution function.

9
The categories of this paper are: nlin
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph