Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the CP-violating phase $\phi_s$ in
  $\overline{B}^0_s\rightarrow J/\psi \pi^+\pi^-$ decays   The mixing-induced CP-violating phase $\phi_s$ in ${B}^0_s$ and
$\overline{B}^0_s$ decays is measured using the $J/\psi \pi^+\pi^-$ final state
in data, taken from 3\,fb$^{-1}$ of integrated luminosity, collected with the
LHCb detector in 7 and 8 TeV centre-of-mass $pp$ collisions at the LHC. A
time-dependent flavour-tagged amplitude analysis, allowing for direct \CP
violation, yields a value for the phase $\phi_s=70\pm 68\pm 8$\,mrad. This
result is consistent with the Standard Model expectation and previous
measurements.

9
The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
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The categories of this paper are: math-ph
16
The categories of this paper are: stat
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The categories of this paper are: physics
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org