Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studies of the decay $B^{0}_{s} \to D^{\mp}_sK^{\pm}$   The decay mode $B^{0}_{s} \to D^{\mp}_s K^{\pm}$ allows for one of the
theoretically cleanest time dependent measurements of the CKM angle $\gamma$.
This contribution reports the world best branching fraction of this decay
relative to the Cabibbo--favoured mode $B^{0}_{s} \to D_{s}^{-}\pi^{+}$ based
on data sample of 0.37 $\rm fb^{-1}$ proton--proton collisions at $\sqrt{s} =
7$ TeV collected with the LHCb detector in 2011, resulting in $BR(\BsDK) =
(1.90 \pm 0.12^{stat} \pm {{0.13^{syst}}^{+0.12}_{-0.14}}^{f_{s}/f_{d}})\times
10^{-4}$.

18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th