Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of direct CP violation parameters in B^+/- -> J/\psi K^+/-
  and B^+/- ->J/psi pi^+/- decays with 10.4 fb^-1 of Tevatron data   We present a measurement of the direct CP-violating charge asymmetry in B^+/-
mesons decaying to J/psi K^+/- and J/psi pi^+/- where J/psi decays to mu^+
mu^-, using the full Run II data set of 10.4 fb^-1 of proton-antiproton
collisions collected using the D0 detector at the Fermilab Tevatron Collider. A
difference in the yield of B^- and B^+ mesons in these decays is found by
fitting to the difference between their reconstructed invariant mass
distributions resulting in asymmetries of ajpk =[0.59 +/- 0.37]%, which is the
most precise measurement to date, and ajppi= [-4.2 +/- 4.5]%. Both measurements
are consistent with standard model predictions.

21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc