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  • PhysRevLett.108.261802

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Search for Pair Production of a Heavy Up-Type Quark Decaying to a W Boson and a b Quark in the lepton+jets Channel with the ATLAS Detector

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Article number261802
<mark>Journal publication date</mark>26/06/2012
<mark>Journal</mark>Physical review letters
Issue number26
Volume108
Number of pages18
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A search is presented for production of a heavy up-type quark (t′) together with its antiparticle, assuming subsequent decay to a W boson and a b quark, t′t¯′→W+bW−b¯. The search is based on 1.04  fb−1 of proton-proton collisions at s√=7  TeV collected by the ATLAS detector at the CERN Large Hadron Collider. Data are analyzed in the lepton+jets final state, characterized by a high transverse momentum isolated electron or muon, high missing transverse momentum, and at least three jets. No significant excess of events above the background expectation is observed. A 95% C.L. lower limit of 404 GeV is set for the mass of the t′ quark.

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Published by the American Physical Society 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