Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the energy response of the ATLAS calorimeter to charged
  pions from
  $W^{\pm}\rightarrow\tau^{\pm}(\rightarrow\pi^{\pm}\nu_{\tau})\nu_{\tau}$
  events in Run 2 data   The energy response of the ATLAS calorimeter is measured for single charged
pions with transverse momentum in the range $10<p_\textrm{T}<300$ GeV. The
measurement is performed using 139 $\textrm{fb}^{-1}$ of LHC proton-proton
collision data at $\sqrt{s}=13$ TeV taken in Run 2 by the ATLAS detector.
Charged pions originating from $\tau$-lepton decays are used to provide a
sample of high-$p_\textrm{T}$ isolated particles, where the composition is
known, to test an energy regime that has not previously been probed by in situ
single-particle measurements. The calorimeter response to single-pions is
observed to be overestimated by ${\sim}2\%$ across a large part of the
$p_{\textrm{T}}$ spectrum in the central region and underestimated by
${\sim}4\%$ in the endcaps in the ATLAS simulation. The uncertainties in the
measurements are ${\lesssim}1\%$ for $15<p_\textrm{T}<185$ GeV in the central
region. To investigate the source of the discrepancies, the width of the
distribution of the ratio of calorimeter energy to track momentum, the energies
per layer and response in the hadronic calorimeter are also compared between
data and simulation.

12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ