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@ARTICLE{Aad:224182,
author = {Aad, Georges and others},
collaboration = {{ATLAS Collaboration}},
title = {{S}earch for single top-quark production via flavour
changing neutral currents at 8 {T}e{V} with the {ATLAS}
detector},
reportid = {PUBDB-2015-03431, CERN-PH-EP-2015-172. arXiv:1509.00294},
year = {2015},
abstract = {A search for single top-quark production via flavour
changing neutral current processes from gluon plus up- or
charm--quark initial states in proton--proton collisions at
the LHC is presented. Data collected with the ATLAS detector
in 2012 at a centre-of-mass energy of 8 TeV and
corresponding to an integrated luminosity of 20.3
$\mbox{fb}^{-1}$ are used. Candidate events for a top quark
decaying into a lepton, a neutrino and a jet are selected
and classified into signal- and background-like candidates
using a neural network. No signal is observed and an upper
limit on the production cross-section multiplied by the $t
\rightarrow Wb$ branching fraction is set. The observed 95
\% CL limit is $\sigma_{qg \rightarrow t} \times B(t
\rightarrow Wb)< 3.4$ pb and the expected 95\% CL limit is
$\sigma_{qg \rightarrow t} \times B(t \rightarrow Wb)< 2.9$
pb. The observed limit can be interpreted as upper limits on
the coupling constants of the flavour changing neutral
current interactions divided by the scale of new physics
$\kappa_{ugt}/\Lambda < 5.8 \times 10^{-3}$ TeV$^{-1}$ and
$\kappa_{cgt}/\Lambda < 13 \times 10^{-3}$ TeV$^{-1}$ and on
the branching fractions $B(t \rightarrow ug) < 4 \times
10^{-5}$ and $B(t \rightarrow cg) < 17 \times 10^{-5}$.},
keywords = {top: production (autogen) / neutral current: flavor
changing (autogen) / branching ratio (autogen) / ATLAS
(autogen) / neural network (autogen) / CERN LHC Coll
(autogen) / initial state (autogen) / new physics (autogen)
/ lepton (autogen) / gluon (autogen)},
cin = {ATLAS},
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)25 / PUB:(DE-HGF)15},
eprint = {1509.00294},
howpublished = {arXiv:1509.00294},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:1509.00294;\%\%$},
url = {https://bib-pubdb1.desy.de/record/224182},
}