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Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector

Aad G.
•
Abbott B.
•
Abdallah J.
altro
Atlas Collaboration
2016
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
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 fb[Formula: see text] 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 [Formula: see text] branching fraction is set. The observed 95 % CL limit is [Formula: see text] and the expected 95 % CL limit is [Formula: see text]. 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 [Formula: see text] and [Formula: see text] and on the branching fractions [Formula: see text] and [Formula: see text].
DOI
10.1140/epjc/s10052-016-3876-4
WOS
WOS:000375277900001
Archivio
http://hdl.handle.net/11390/1109806
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84958164056
Diritti
metadata only access
Scopus© citazioni
37
Data di acquisizione
Jun 14, 2022
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Web of Science© citazioni
38
Data di acquisizione
Mar 14, 2024
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