Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charged particle transverse momentum spectra in pp collisions at sqrt(s)
  = 0.9 and 7 TeV   The charged particle transverse momentum (pT) spectra are presented for pp
collisions at sqrt(s)=0.9 and 7 TeV. The data samples were collected with the
CMS detector at the LHC and correspond to integrated luminosities of 231
inverse microbarns and 2.96 inverse picobarns, respectively. Calorimeter-based
high-transverse-energy triggers are employed to enhance the statistical reach
of the high-pT measurements. The results are compared with both leading-order
QCD and with an empirical scaling of measurements at different collision
energies using the scaling variable xT = 2 pT/sqrt(s) over the pT range up to
200 GeV/c. Using a combination of xT scaling and direct interpolation at fixed
pT, a reference transverse momentum spectrum at sqrt(s)=2.76 TeV is
constructed, which can be used for studying high-pT particle suppression in the
dense QCD medium produced in heavy-ion collisions at that centre-of-mass
energy.

14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph