• Open Access

Search for tb Resonances in Proton-Proton Collisions at s=7TeV with the ATLAS Detector

G. Aad et al. (ATLAS Collaboration)
Phys. Rev. Lett. 109, 081801 – Published 21 August 2012

Abstract

This Letter presents a search for tb resonances in 1.04fb1 of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the invariant mass of the corresponding final state is reconstructed. The search exploits the shape of the tb invariant mass distribution compared to the expected standard model backgrounds. The model of a right-handed WR with standard model-like couplings is chosen as the benchmark model for this search. No statistically significant excess of events is observed in the data, and upper limits on the cross section times the branching ratio of WR resonances at 95% C.L. lie in the range of 6.1–1.0 pb for WR masses ranging from 0.5 to 2.0 TeV. These limits are translated into a lower bound on the allowed right-handed WR mass, giving mWR>1.13TeV at 95% C.L.

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  • Received 4 May 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.081801

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2012 CERN, for the ATLAS Collaboration

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Vol. 109, Iss. 8 — 24 August 2012

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