Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Performance of the ATLAS Transition Radiation Tracker in Run 1 of the
  LHC: tracker properties   The tracking performance parameters of the ATLAS Transition Radiation Tracker
(TRT) as part of the ATLAS inner detector are described in this paper for
different data-taking conditions in proton-proton, proton-lead and lead-lead
collisions at the Large Hadron Collider (LHC). The performance is studied using
data collected during the first period of LHC operation (Run 1) and is compared
with Monte Carlo simulations. The performance of the TRT, operating with two
different gas mixtures (xenon-based and argon-based) and its dependence on the
TRT occupancy is presented. These studies show that the tracking performance of
the TRT is similar for the two gas mixtures and that a significant contribution
to the particle momentum resolution is made by the TRT up to high particle
densities.

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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: math
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int