Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of mixing and CP violation parameters in two-body charm
  decays   A study of mixing and indirect CP violation in D0 mesons through the
determination of the parameters y_CP and A_\Gamma\ is presented. The parameter
y_CP is the deviation from unity of the ratio of effective lifetimes measured
in D0 decays to the CP eigenstate K+K- with respect to decays to the Cabibbo
favoured mode K-\pi+. The result measured using data collected by LHCb in 2010,
corresponding to an integrated luminosity of 29 pb^-1, is y_CP =
(5.5+/-6.3_{stat}+/-4.1_{syst}) x 10^-3. The parameter A_\Gamma\ is the
asymmetry of effective lifetimes measured in decays of D0 and anti-D0 mesons to
K+K-. The result is A_\Gamma\ = (-5.9+/-5.9_{stat}+/-2.1_{syst}) x 10^-3. A
data-driven technique is used to correct for lifetime-biasing effects.

11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ