A search for tt¯ resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at s√=7 TeV with the ATLAS detector

, The ATLAS collaboration (2012) A search for tt¯ resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at s√=7 TeV with the ATLAS detector. Journal of High Energy Physics, 2012 (9). ISSN 1029-8479

[img]
Preview
PDF (art%3A10.1007%2FJHEP09%282012%29041)
art_3A10.1007_2FJHEP09_282012_29041.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1MB)

Abstract

A search for resonant production of high-mass top-quark pairs is performed on 2.05 fb−1 of proton-proton collisions at s√=7 TeV collected in 2011 with the ATLAS experiment at the Large Hadron Collider. This analysis of the lepton+jets final state is specifically designed for the particular topology that arises from the decay of highly boosted top quarks. The observed tt¯ invariant mass spectrum is found to be compatible with the Standard Model prediction and 95% credibility level upper limits are derived on the tt¯ production rate through new massive states. An upper limit of 0.7 pb is set on the production cross section times branching fraction of a narrow 1 TeV resonance. A Kaluza-Klein gluon with a mass smaller than 1.5 TeV is excluded.

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Additional Information:
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.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
68091
Deposited By:
Deposited On:
17 Dec 2013 00:03
Refereed?:
Yes
Published?:
Published
Last Modified:
27 Oct 2020 04:18