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@ARTICLE{Aaboud:425389,
author = {Aaboud, Morad and others},
collaboration = {{ATLAS Collaboration}},
title = {{M}easurement of the ratio of cross sections for inclusive
isolated-photon production in $pp$ collisions at $\sqrt s =
13$ and $8$ {T}e{V} with the {ATLAS} detector},
journal = {Journal of high energy physics},
volume = {2019},
number = {4},
issn = {1029-8479},
address = {[Trieste]},
publisher = {SISSA},
reportid = {PUBDB-2019-03204, arXiv:1901.10075. CERN-EP-2018-340},
pages = {93},
year = {2019},
note = {(c) Copyright CERN, for the benefit of the ATLAS
Collaboration. Article funded by SCOAP},
abstract = {The ratio of the cross sections for inclusive
isolated-photon production in pp collisions at
centre-of-mass energies of 13 and 8 TeV is measured using
the ATLAS detector at the LHC. The integrated luminosities
of the 13 TeV and 8 TeV datasets are 3.2 fb$^{−1}$ and
20.2 fb$^{−1}$, respectively. The ratio is measured as a
function of the photon transverse energy in different
regions of the photon pseudorapidity. The predictions from
next-to-leading-order perturbative QCD calculations are
compared with the measured ratio. The experimental
systematic uncertainties as well as the uncertainties
affecting the predictions are evaluated taking into account
the correlations between the two centre-of-mass energies,
resulting in a reduction of up to a factor of 2.5 (5) in the
experimental (theoretical) systematic uncertainties. The
predictions based on several parameterisations of the proton
parton distribution functions agree with the data within the
reduced experimental and theoretical uncertainties. In
addition, this ratio to that of the fiducial cross sections
for Z boson production at 13 and 8 TeV using the decay
channels Z → e$^{+}$e$^{−}$ and Z → μ$^{+}$μ$^{−}$
is made and compared with the theoretical predictions. In
this double ratio, a further reduction of the experimental
uncertainty is obtained because the uncertainties arising
from the luminosity measurement cancel out. The predictions
describe the measurements of the double ratio within the
theoretical and experimental uncertainties.},
keywords = {p p: colliding beams (INSPIRE) / cross section: ratio
(INSPIRE) / energy dependence (INSPIRE) / rapidity
dependence (INSPIRE) / parton: distribution function
(INSPIRE) / p p: scattering (INSPIRE) / Z0: leptonic decay
(INSPIRE) / muon: pair production (INSPIRE) / electron: pair
production (INSPIRE) / photon: transverse energy (INSPIRE) /
luminosity: monitoring (INSPIRE) / photon: rapidity
(INSPIRE) / quantum chromodynamics: perturbation theory
(INSPIRE) / perturbation theory: higher-order (INSPIRE) /
higher-order: 1 (INSPIRE) / ATLAS (INSPIRE) / CERN LHC Coll
(INSPIRE) / correlation (INSPIRE) / experimental results
(INSPIRE) / 8000 GeV-cms13000 GeV-cms (INSPIRE)},
cin = {ATLAS},
ddc = {530},
cid = {I:(DE-H253)ATLAS-20120731},
pnm = {611 - Fundamental Particles and Forces (POF3-611)},
pid = {G:(DE-HGF)POF3-611},
experiment = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
typ = {PUB:(DE-HGF)29 / PUB:(DE-HGF)16},
eprint = {1901.10075},
howpublished = {arXiv:1901.10075},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:1901.10075;\%\%$},
UT = {WOS:000465438700002},
doi = {10.1007/JHEP04(2019)093},
url = {https://bib-pubdb1.desy.de/record/425389},
}