Scientific article

Measurement of tt production with a veto on additional central jet activity in pp collisions at √s=7 TeV using the ATLAS detector

ContributorsATLAS Collaboration
Published inEuropean physical journal. C, Particles and fields, vol. 72, no. 2043, 24
Publication date2012

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.

Citation (ISO format)
ATLAS Collaboration. Measurement of <em>tt</em> production with a veto on additional central jet activity in <em>pp</em> collisions at √s=7 TeV using the ATLAS detector. In: European physical journal. C, Particles and fields, 2012, vol. 72, n° 2043, p. 24. doi: 10.1140/epjc/s10052-012-2043-9
Main files (1)
Article (Published version)
ISSN of the journal1434-6044

Technical informations

Creation09/12/2014 3:35:00 PM
First validation09/12/2014 3:35:00 PM
Update time03/14/2023 9:45:47 PM
Status update03/14/2023 9:45:47 PM
Last indexation05/08/2024 6:25:26 PM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack