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@ARTICLE{Aad:588796,
author = {Aad, Georges and others},
collaboration = {{ATLAS Collaboration}},
title = {{E}xclusive dielectron production in ultraperipheral
{P}b+{P}b collisions at $ \sqrt{s_{\textrm{{NN}}}} $ = 5.02
{T}e{V} with {ATLAS}},
journal = {Journal of high energy physics},
volume = {06},
number = {6},
issn = {1126-6708},
address = {[Trieste]},
publisher = {SISSA},
reportid = {PUBDB-2023-04953, arXiv:2207.12781. CERN-EP-2022-130},
pages = {182},
year = {2023},
note = {21 pages in total, 7 figures, 0 tables, submitted to JHEP.
All figures including auxiliary figures are available at
http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2021-16},
abstract = {Exclusive production of dielectron pairs, γγ →
e$^{+}$e$^{−}$, is studied using $
{\mathcal{L}}_{\textrm{int}} $ = 1.72 nb$^{−1}$ of data
from ultraperipheral collisions of lead nuclei at $
\sqrt{s_{\textrm{NN}}} $ = 5.02 TeV recorded by the ATLAS
detector at the LHC. The process of interest proceeds via
photon–photon interactions in the strong electromagnetic
fields of relativistic lead nuclei. Dielectron production is
measured in the fiducial region defined by following
requirements: electron transverse momentum $
{p}_{\textrm{T}}^e $> 2.5 GeV, absolute electron
pseudorapidity |η$^{e}$| < 2.5, dielectron invariant mass
m$_{ee}$> 5 GeV, and dielectron transverse momentum $
{p}_{\textrm{T}}^{ee} $< 2 GeV. Differential cross-sections
are measured as a function of m$_{ee}$, average $
{p}_{\textrm{T}}^e $, absolute dielectron rapidity
|y$_{ee}$|, and scattering angle in the dielectron rest
frame, |cos θ$^{*}$|, in the inclusive sample, and also
with a requirement of no activity in the forward direction.
The total integrated fiducial cross-section is measured to
be $ 215\pm
1{\left(\textrm{stat}.\right)}_{-20}^{+23}\left(\textrm{syst}.\right)\pm
4\left(\textrm{lumi}.\right) $μb. Within experimental
uncertainties the measured integrated cross-section is in
good agreement with the QED predictions from the Monte Carlo
programs Starlight and SuperChic, confirming the broad
features of the initial photon fluxes. The differential
cross-sections show systematic differences from these
predictions which are more pronounced at high |y$_{ee}$| and
|cos θ$^{*}$| values.[graphic not available: see fulltext]},
keywords = {lead: nucleus (INSPIRE) / electromagnetic field: high
(INSPIRE) / electron: rapidity (INSPIRE) / cross section:
measured (INSPIRE) / electron: transverse momentum (INSPIRE)
/ photon photon: interaction (INSPIRE) / heavy ion:
scattering (INSPIRE) / peripheral (INSPIRE) / ATLAS
(INSPIRE) / differential cross section (INSPIRE) / quantum
electrodynamics (INSPIRE) / CERN LHC Coll (INSPIRE) /
exclusive production (INSPIRE) / Monte Carlo (INSPIRE) /
5020 GeV-cms/nucleon (INSPIRE) / Heavy Ion Experiments
(autogen) / Heavy-Ion Collision (autogen)},
cin = {ATLAS},
ddc = {530},
cid = {I:(DE-H253)ATLAS-20120731},
pnm = {611 - Fundamental Particles and Forces (POF4-611)},
pid = {G:(DE-HGF)POF4-611},
experiment = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101},
typ = {PUB:(DE-HGF)16},
eprint = {2207.12781},
howpublished = {arXiv:2207.12781},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:2207.12781;\%\%$},
UT = {WOS:001069745300005},
doi = {10.1007/JHEP06(2023)182},
url = {https://bib-pubdb1.desy.de/record/588796},
}