Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transverse momentum distribution and nuclear modification factor of
  charged particles in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV   The transverse momentum ($p_{\mathrm T}$) distribution of primary charged
particles is measured in minimum bias (non-single-diffractive) p-Pb collisions
at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ALICE detector at the LHC. The
$p_{\mathrm T}$ spectra measured near central rapidity in the range
$0.5<p_{\mathrm T}<20$ GeV/$c$ exhibit a weak pseudorapidity dependence. The
nuclear modification factor $R_{\mathrm{pPb}}$ is consistent with unity for
$p_{\mathrm T}$ above 2 GeV/$c$. This measurement indicates that the strong
suppression of hadron production at high $p_{\mathrm T}$ observed in Pb-Pb
collisions at the LHC is not due to an initial-state effect. The measurement is
compared to theoretical calculations.

25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs