Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/101920
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Type: Journal article
Title: Measurement of tt⁻ production with a veto on additional central jet activity in pp collisions at √s = 7 TeV using the ATLAS detector
Other Titles: Measurement of tt(-) production with a veto on additional central jet activity in pp collisions at root s = 7 TeV using the ATLAS detector
Author: Aad, G.
ATLAS Collaboration
Citation: The European Physical Journal C, 2012; 72(6):2043-1-2043-24
Publisher: Springer
Issue Date: 2012
ISSN: 1434-6044
1434-6052
Statement of
Responsibility: 
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration)
Abstract: A measurement of the jet activity in tt⁻ 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 tt⁻ 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.
Keywords: ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2012. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
RMID: 0020132663
DOI: 10.1140/epjc/s10052-012-2043-9
Appears in Collections:Physics publications

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