Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of the dijet mass spectrum in pp to W + jets events at sqrt(s) = 7
  TeV   We report an investigation of the invariant mass spectrum of the two jets
with highest transverse momentum in pp to W+2-jet and W+3-jet events to look
for resonant enhancements. The data sample corresponds to an integrated
luminosity of 5.0 inverse femtobarns collected with the CMS detector at sqrt(s)
= 7 TeV. We find no evidence for the anomalous structure reported by the CDF
Collaboration, and establish an upper limit of 5.0 pb at 95% confidence level
on the production cross section for a generic Gaussian signal with mass near
150 GeV. Additionally, we exclude two theoretical models that predict a
CDF-like dijet resonance near 150 GeV.

26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
16
The categories of this paper are: stat
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th