Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exclusive two $\rho ^0$-mesons production in $\gamma\gamma^*$ collision   We give a theoretical description of the L3 Collaboration data on the
cross-section of the exclusive two $\rho$-mesons production in $\gamma\gamma
^*$ collision with large photon virtuality. These data prove the scaling
behaviour of the leading twist generalized distribution amplitude of vector
mesons. They thus prove the relevance of a partonic description of the
exclusive process $\gamma\gamma ^*\to\rho ^0\rho ^0$ at $Q^2\geq 1.2 {\rm
GeV^2}$ and $W\leq 3.0 {\rm GeV}.$

1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas