Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Search for single top-quark production via flavour-changing neutral currents at 8 TeV with the ATLAS detector|
|Citation:||European Physical Journal C, 2016; 76(2):1-30|
|G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... [et al.] (The ATLAS Collaboration)|
|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⁻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→Wb branching fraction is set. The observed 95% CL limit is σqg→t×B(t→Wb)<3.4pb and the expected 95 % CL limit is σqg→t×B(t→Wb)<2.9pb. 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 κugt/Λ<5.8×10⁻³ TeV⁻¹ and κcgt/Λ<13×10⁻³ TeV and on the branching fractions B(t→ug)<4.0×10⁻⁵ and B(t→cg)<20×10⁻⁵.|
|Rights:||© CERN for the benefit of the ATLAS collaboration 2016. This article is published with open access at Springerlink.com|
|Appears in Collections:||Physics publications|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.