Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of $\chi_{b}$ meson production in pp collisions at $\sqrt{s}=7$
  and 8TeV and observation of the decay $\chi_{b}\rightarrow \Upsilon(3S)
  \gamma$   A study of $\chi_{b}$ meson production at LHCb is performed on proton-proton
collision data, corresponding to 3.0fb$^{-1}$ of integrated luminosity
collected at centre-of-mass energies $\sqrt{s}=7$ and 8TeV. The fraction of
$\Upsilon(nS)$ mesons originating from $\chi_{b}$ decays is measured as a
function of the $\Upsilon$ transverse momentum in the rapidity range $2.0 <
y^{\Upsilon} < 4.5$. The radiative transition of the $\chi_{b}(3P)$ meson to
$\Upsilon(3S)$ is observed for the first time. The $\chi_{b1}(3P)$ mass is
determined to be $$m(\chi_{b1}(3P)) = 10\,511.3 \pm 1.7 \pm 2.5 MeV/c^2,$$
where the first uncertainty is statistical and the second is systematic.

15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci