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

ATLAS Collaboration

doi:10.1140/epjc/s10052-016-3876-4

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

ATLAS Collaboration

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

198 Downloads (Pure)

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 $8\;\mbox{TeV}$ 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)Wb)

Original language	English
Journal	Eur. Phys. J. C
Volume	76
Issue number	55
DOIs	https://doi.org/10.1140/epjc/s10052-016-3876-4
Publication status	E-pub ahead of print - 29 Jan 2016

Bibliographical note

29 pages plus the Autors list and cover page (45 pages in total), 10 figures, 3 tables, submitted to EPJC, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2014-13/

Keywords

hep-ex

Access to Document

10.1140/epjc/s10052-016-3876-4Licence: Creative Commons: Attribution (CC BY)

pdfAccepted author manuscript, 1.22 MBLicence: Creative Commons: Attribution (CC BY)

PPGP Capital Equipment Call
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/13 → 30/09/14
Project: Research Councils
2012 Consolidated Grant Supplement
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/12 → 31/03/14
Project: Research Councils
ATLAS - UK Tracker Upgrade
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/12 → 30/09/13
Project: Research Councils
Birmimgham Experimental Particle Physics Consolidated Grant
Newman, P. (Principal Investigator), Charlton, D. (Co-Investigator), Hawkes, C. (Co-Investigator), Lazzeroni, C. (Co-Investigator), Nikolopoulos, K. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator) & Wilson, J. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/12 → 30/09/16
Project: Research Councils
Wakeham Efficiency Saving PP
Newman, P. (Principal Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
9/03/12 → 31/03/12
Project: Research Councils
Experimental Particle Physics 2009-2014
Newman, P. (Principal Investigator), Charlton, D. (Co-Investigator), Hawkes, C. (Co-Investigator), Watkins, P. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator), Wilson, J. (Co-Investigator) & Lazzeroni, C. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/09 → 30/09/12
Project: Research Councils
Experimental Particle Physics 2006-2011
Watkins, P. (Principal Investigator), Charlton, D. (Co-Investigator), Evans, P. (Co-Investigator), Hawkes, C. (Co-Investigator), Newman, P. (Co-Investigator), Watson, A. (Co-Investigator), Watson, N. (Co-Investigator) & Wilson, J. (Co-Investigator)
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/10/06 → 30/09/11
Project: Research Councils

Cite this

@article{79d139105ddc467a8bd58b6ebdfa2b62,

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

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 $8\;\mbox{TeV}$ 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)Wb)",

keywords = "hep-ex",

author = "{ATLAS Collaboration} and Paul Newman",

note = "29 pages plus the Autors list and cover page (45 pages in total), 10 figures, 3 tables, submitted to EPJC, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2014-13/",

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language = "English",

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AU - ATLAS Collaboration

AU - Newman, Paul

N1 - 29 pages plus the Autors list and cover page (45 pages in total), 10 figures, 3 tables, submitted to EPJC, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2014-13/

PY - 2016/1/29

Y1 - 2016/1/29

N2 - 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 $8\;\mbox{TeV}$ 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)Wb)

AB - 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 $8\;\mbox{TeV}$ 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)Wb)

KW - hep-ex

U2 - 10.1140/epjc/s10052-016-3876-4

DO - 10.1140/epjc/s10052-016-3876-4

M3 - Article

SN - 1434-6044

VL - 76

JO - Eur. Phys. J. C

JF - Eur. Phys. J. C

IS - 55

ER -

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

Abstract

Bibliographical note

Keywords

Access to Document

Fingerprint

Projects

PPGP Capital Equipment Call

2012 Consolidated Grant Supplement

ATLAS - UK Tracker Upgrade

Birmimgham Experimental Particle Physics Consolidated Grant

Wakeham Efficiency Saving PP

Experimental Particle Physics 2009-2014

Experimental Particle Physics 2006-2011

Cite this