Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the ratio of the production cross sections times
  branching fractions of Bc+/- to J/psi pi+/- and B+/- to J/psi K+/- and
  B(Bc+/- to J/psi pi+/- pi+/- pi-/+)/B(Bc+/- to J/psi pi+/-) in pp collisions
  at sqrt(s) = 7 TeV   The ratio of the production cross sections times branching fractions
(sigma(Bc+) B(Bc+ to J/psi pi+))/ (sigma(B+) B(B+ to J/psi K+)) is studied in
proton-proton collisions at a center-of-mass energy of 7 TeV with the CMS
detector at the LHC. The kinematic region investigated requires Bc+/- and B+/-
mesons with transverse momentum pt > 15 GeV and rapidity abs(y) < 1.6. The data
sample corresponds to an integrated luminosity of 5.1 inverse femtobarns. The
ratio is determined to be [0.48 +/- 0.05 (stat) +/- 0.03 (syst) +/- 0.05
(tau_{Bc})]% The J/psi pi+/- pi+/- pi-/+ decay mode is also observed in the
same data sample. Using a model-independent method developed to measure the
efficiency given the presence of resonant behaviour in the three-pion system,
the ratio of the branching fractions B(Bc+/- to J/psi pi+/- pi+/- pi-/+) /
B(Bc+/- to J/psi pi+/-) is measured to be 2.55 +/- 0.80 (stat) +/- 0.33 (syst)
+0.04/-0.01 (tau[Bc+]), consistent with the previous LHCb result.

11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ