skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel

Journal Article · · Physics Letters B
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; « less

A measurement of the production cross-section for top quark pairs ($$t\bar{t}$$) in pp collisions at $$\sqrt{s} = 7TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse momentum and at least three jets. With a data sample of 35 pb-1, two different multivariate methods, one of which uses b-quark jet identification while the other does not, use kinematic variables to obtain cross-section measurements of σ$$t\bar{t}$ = 187±11 (stat.) $$+18\atop{-17}$$ (syst.) ± 6 (lumi.) pb and σ$$t\bar{t}$$ =173 ± 17 (stat.) $$+18\atop{-16}$$ (syst.) ± 6 (lumi.) pb respectively. In conclusion, the two measurements are in agreement with each other and with QCD calculations. The first measurement has a better a priori sensitivity and constitutes the main result of this Letter.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC02-98CH10886
OSTI ID:
1046428
Report Number(s):
BNL-98249-2012-JA; KA1101021; TRN: US1203759
Journal Information:
Physics Letters B, Vol. 711, Issue 3-4
Country of Publication:
United States
Language:
English

References (31)

Theoretical status and prospects for top-quark pair production at hadron colliders journal August 2008
Threshold expansion of the <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>g</mml:mi><mml:mi>g</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mi>q</mml:mi><mml:mover accent="true"><mml:mi>q</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mo stretchy="false">)</mml:mo><mml:mo>→</mml:mo><mml:mover accent="true"><mml:mi mathvariant="italic">QQ</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mo>+</mml:mo><mml:mi>X</mml:mi></mml:math> cross section at <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi mathvariant="script">O</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:msubsup><mml:mi>α</mml:mi><mml:mi>s</mml:mi><mml:mn>4</mml:mn></mml:msubsup><mml:mo stretchy="false">)</mml:mo></mml:math> journal July 2010
Measurement of the t t ¯ production cross section in p p ¯ collisions at s = 1.8 TeV journal July 2001
Erratum: Measurement of the t t ¯ production cross section in p p ¯ collisions at s = 1.8 TeV [Phys. Rev. D 64 , 032002 (2001)] journal June 2003
Measurement of the Ratio σ t t ¯ / σ Z / γ * → l l and Precise Extraction of the t t ¯ Cross Section journal June 2010
t t ¯ production cross section in p p ¯ collisions at s = 1.8 TeV journal January 2003
Measurement of the top quark pair production cross section in the lepton + jets channel in proton-antiproton collisions at s = 1.96     TeV journal July 2011
Measurement of the top quark-pair production cross section with ATLAS in pp collisions at $\sqrt{s}=7$  TeV journal March 2011
Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS journal February 2012
Measurement of the t t ¯ production cross section in p p collisions at 7 TeV in lepton + jets events using b -quark jet identification journal November 2011
The ATLAS Simulation Infrastructure journal September 2010
Geant4—a simulation toolkit
  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3 https://doi.org/10.1016/S0168-9002(03)01368-8
journal July 2003
Matching NLO QCD and parton showers in heavy flavour production journal August 2003
New Generation of Parton Distributions with Uncertainties from Global QCD Analysis journal July 2002
ALPGEN, a generator for hard multiparton processes in hadronic collisions journal July 2003
HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes) journal January 2001
Single-top hadroproduction in association with a W boson journal July 2008
Multiparton interactions in photoproduction at HERA journal December 1996
A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms journal November 2004
PYTHIA 6.4 physics and manual journal May 2006
Tuning Monte Carlo generators: The Perugia tunes journal October 2010
A first unbiased global NLO determination of parton distributions and their uncertainties journal October 2010
Parton distributions for the LHC journal July 2009
Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>7</mml:mn><mml:mtext> </mml:mtext><mml:mtext>TeV</mml:mtext></mml:math> with the ATLAS detector journal February 2012
Radiative corrections to Zb b ¯ production journal October 2000
Measurement of inclusive jet and dijet cross sections in proton-proton collisions at 7 TeV centre-of-mass energy with the ATLAS detector journal February 2011
The anti- k t jet clustering algorithm journal April 2008
Dispelling the <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>N</mml:mi><mml:mn>3</mml:mn></mml:msup></mml:math> myth for the <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msub><mml:mi>k</mml:mi><mml:mi>t</mml:mi></mml:msub></mml:math> jet-finder journal September 2006
Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s} = 7~\mbox{TeV}$ with ATLAS journal January 2012
Luminosity determination in pp collisions at $\sqrt{s} = 7$ TeV using the ATLAS detector at the LHC journal April 2011
HATHOR – HAdronic Top and Heavy quarks crOss section calculatoR journal April 2011

Cited By (44)

Measurements of top-quark pair to Z-boson cross-section ratios at s = 13 $$ \sqrt{s}=13 $$ , 8, 7 TeV with the ATLAS detector journal February 2017
Measurements of the top quark branching ratios into channels with leptons and quarks with the ATLAS detector journal October 2015
Light-quark and gluon jet discrimination in $$pp$$ p p collisions at $$\sqrt{s}=7\mathrm {\ TeV}$$ s = 7 TeV with the ATLAS detector journal August 2014
Measurement of the Top Quark Pair Production Cross Section in Proton-Proton Collisions at s = 13     TeV journal February 2016
Measurement of the inclusive t t ¯ $$ \mathrm{t}\overline{\mathrm{t}} $$ cross section in pp collisions at s = 5.02 $$ \sqrt{s}=5.02 $$ TeV using final states with at least one charged lepton journal March 2018
Constraining top quark effective theory in the LHC Run II era journal April 2016
On the model dependence of fiducial cross-section measurements journal December 2019
Search for t t ¯ resonances in the lepton plus jets final state with ATLAS using 4.7     fb − 1 of p p collisions at s = 7     TeV journal July 2013
Observation of top-quark pair production in association with a photon and measurement of the t t ¯ γ production cross section in p p collisions at s = 7 TeV using the ATLAS detector journal April 2015
Measurement of the $$\mathrm{t}\overline{\mathrm{t}} $$ t t ¯ production cross section using events in the $$\mathrm {e}\mu $$ e μ final state in pp collisions at $$\sqrt{s}=13\,\text {TeV} $$ s = 13 TeV journal March 2017
Measurement of τ polarization in W→τν decays with the ATLAS detector in pp collisions at $\sqrt{s} =7~\mathrm{TeV}$ journal July 2012
Measurements of the $$\mathrm{t}\overline{\mathrm{t}}$$ t t ¯ production cross section in lepton+jets final states in pp collisions at 8 $$\,\text {TeV}$$ TeV and ratio of 8 to 7  $$\,\text {TeV}$$ TeV cross sections journal January 2017
A search for $t\bar{t}$ resonances with the ATLAS detector in 2.05 fb−1 of proton-proton collisions at $\sqrt{s} = 7~\mathrm{TeV}$ journal July 2012
Handbook of vectorlike quarks: Mixing and single production journal November 2013
Measurements of the $$W$$ W production cross sections in association with jets with the ATLAS detector journal February 2015
Measurement of the $$\mathrm{t}\overline{{\mathrm{t}}}$$ t t ¯ production cross section in the all-jets final state in pp collisions at $$\sqrt{s}=8$$ s = 8 $$\,\text {TeV}$$ TeV journal March 2016
Analysis of the Wtb vertex from the measurement of triple-differential angular decay rates of single top quarks produced in the t-channel at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector journal December 2017
Measurements of differential cross sections of top quark pair production in association with jets in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV using the ATLAS detector journal October 2018
Measurement of jet shapes in top-quark pair events at $\sqrt{s} = 7 \ \mbox{TeV}$ using the ATLAS detector journal December 2013
Search for supersymmetry in events with four or more leptons in s = 8     TeV p p collisions with the ATLAS detector journal September 2014
Top-quark physics at the Large Hadron Collider journal May 2017
Measurements of top quark pair relative differential cross-sections with ATLAS in pp collisions at $\sqrt{s} = 7\ \mbox{TeV}$ journal January 2013
Top Quark Physics at the lhc: a Review of the First two Years journal June 2012
Probing the W tb vertex structure in t-channel single-top-quark production and decay in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector journal April 2017
Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at $$\sqrt{s}=8\,~{\mathrm {TeV}}$$ s = 8 TeV using the ATLAS detector journal October 2016
Top Quark Physics, an Experimental Perspective journal July 2013
Measurements of top-quark pair differential cross-sections in the lepton+jets channel in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV using the ATLAS detector journal November 2017
A precise determination of the top-quark pole mass journal March 2018
Securing the Empirical Value of Measurement Results journal June 2018
Measurements of the top quark branching ratios into channels with leptons and quarks with the ATLAS detector text January 2015
A search for ttbar resonances with the ATLAS detector in 2.05 fb^-1 of proton-proton collisions at sqrt(s) = 7 TeV text January 2012
Top Quark Physics at the LHC: A Review of the First Two Years text January 2012
A handbook of vector-like quarks: mixing and single production text January 2013
Top-quark physics at the Large Hadron Collider text January 2016
Rare two-body decays of the top quark into a bottom meson plus an up or charm quark journal July 2020
Top partner probes of extended Higgs sectors journal August 2013
Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton–proton collisions at $$\sqrt{s} = 13$$ s = 13   $$\text {TeV}$$ TeV with the ATLAS detector journal July 2018
Measurement of the top quark pair cross section with ATLAS in pp collisions at sqrt(s) = 7 TeV using final states with an electron or a muon and a hadronically decaying tau lepton text January 2012
Measurements of top quark pair relative differential cross-sections with ATLAS in pp collisions at sqrt(s) = 7 TeV text January 2012
Search for single b*-quark production with the ATLAS detector at sqrt(s)=7 TeV text January 2013
A search for $t\bar{t}$ resonances using lepton-plus-jets events in proton-proton collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector text January 2015
Search for anomalous couplings in the $Wtb$ vertex from the measurement of double differential angular decay rates of single top quarks produced in the $t$-channel with the ATLAS detector text January 2015
Measurements of charge and CP asymmetries in $b$-hadron decays using top-quark events collected by the ATLAS detector in $pp$ collisions at $\sqrt{s}=8$ TeV text January 2016
On the Model Dependence of Fiducial Cross Section Measurements in View of Reinterpretations preprint January 2019

Similar Records

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONS
HADRONS
LEPTONS
PAIR PRODUCTION
PHYSICS
PRODUCTION
QUANTUM CHROMODYNAMICS
SENSITIVITY
T QUARKS
TOPOLOGY
TRANSVERSE MOMENTUM