Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Predictions of exclusive $\Upsilon$ photoproduction at the LHC and
  future colliders   The cross section for exclusive $\Upsilon$ ultraperipheral photoproduction at
present and future colliders is determined using the low $x$ gluon PDF
extracted from an analysis of exclusive $J/\psi$ measurements performed at HERA
and the LHC. Predictions are given at next-to-leading order in collinear
factorisation over a wide $\gamma p$ centre-of-mass energy range, calculated
assuming the non-relativistic approximation for the $\Upsilon$ wave function,
and with skewing corrections incorporated.

25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess