Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The ${\Upsilon}(nS)$ ${\to}$ $B_{c}^{\ast}{\pi}$, $B_{c}^{\ast}K$ decays
  with perturbative QCD approach   Besides the traditional strong and electromagnetic decay modes,
${\Upsilon}(nS)$ meson can also decay through the weak interactions within the
standard model of elementary particle. With anticipation of copious
${\Upsilon}(nS)$ data samples at the running LHC and coming SuperKEKB
experiments, the two-body nonleptonic bottom-changing ${\Upsilon}(nS)$ ${\to}$
$B_{c}^{\ast}{\pi}$, $B_{c}^{\ast}K$ decays ($n$ $=$ 1, 2, 3) are investigated
with perturbative QCD approach firstly. The absolute branching ratios for
${\Upsilon}(nS)$ ${\to}$ $B_{c}^{\ast}{\pi}$ and $B_{c}^{\ast}K$ decays are
estimated to reach up to about $10^{-10}$ and $10^{-11}$, respectively, which
might possibly be measured by the future experiments.

20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg