Scientific article
English

A search for tt resonances with the ATLAS detector in 2.05 fb−1 of proton-proton collisions at √s=7 TeV

ContributorsATLAS Collaboration
Published inEuropean physical journal. C, Particles and fields, vol. 72, no. 2083, 23
Publication date2012
Abstract

A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb−1, which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to tt for narrow and wide resonances. For narrow Z′ bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of m Z′=500 GeV to m Z′=1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is m Z′<880 GeV ( mgKK<1130 GeV ).

Citation (ISO format)
ATLAS Collaboration. A search for tt resonances with the ATLAS detector in 2.05 fb−1 of proton-proton collisions at √s=7 TeV. In: European physical journal. C, Particles and fields, 2012, vol. 72, n° 2083, p. 23. doi: 10.1140/epjc/s10052-012-2083-1
Main files (1)
Article (Published version)
accessLevelRestricted
Identifiers
Journal ISSN1434-6044
543views
0downloads

Technical informations

Creation01/09/2014 14:36:00
First validation01/09/2014 14:36:00
Update time14/03/2023 21:34:05
Status update14/03/2023 21:34:05
Last indexation30/10/2024 19:54:12
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack