CERN Accelerating science

Article
Report number arXiv:1203.5015 ; CERN-PH-EP-2012-062 ; CERN-PH-EP-2012-062
Title Measurement of tt¯ production with a veto on additional central jet activity in pp collisions at s = 7 TeV using the ATLAS detector
Related titleMeasurement of ttbar production with a veto on additional central jet activity in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector
Author(s) ATLAS Collaboration  Mostra tots els 3054 autors
Publication 2012-06-21
Imprint 23 Mar 2012
Number of pages 27
Note Comments: 12 pages plus author list (27 pages total), 7 figures, 1 table
14 pages plus author list (29 pages total), 7 figures, 3 tables, revised author list, matches version to appear in European Physical Journal C
In: Eur. Phys. J. C 72 (2012) 2043
DOI 10.1140/epjc/s10052-012-2043-9
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords QCD ; top physics ; experimental results
Abstract A measurement of the jet activity in ttbar events produced in proton-proton collisions at a centre-of-mass energy of 7 TeV is presented, using 2.05 fb^-1 of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. The ttbar events are selected in the dilepton decay channel with two identified b-jets from the top quark decays. Events are vetoed if they contain an additional jet with transverse momentum above a threshold in a central rapidity interval. The fraction of events surviving the jet veto is presented as a function of this threshold for four different central rapidity interval definitions. An alternate measurement is also performed, in which events are vetoed if the scalar transverse momentum sum of the additional jets in each rapidity interval is above a threshold. In both measurements, the data are corrected for detector effects and compared to the theoretical models implemented in MC@NLO, POWHEG, ALPGEN and SHERPA. The experimental uncertainties are often smaller than the spread of theoretical predictions, allowing deviations between data and theory to be observed in some regions of phase space.
Copyright/License publication: © 2012-2025 CERN (License: CC-BY-3.0)
preprint: © 2012-2025 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: tony.doyle@glasgow.ac.uk


 Registre creat el 2012-03-23, darrera modificació el 2024-03-14


Springer Open Access article:
Descarregar el text completPDF
Text complet:
Descarregar el text completPDF
Enllaços externs:
Descarregar el text completall figures including auxiliary figures
Descarregar el text completRivet analyses reference
  • Send to ScienceWise.info