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Search for a heavy top-quark partner in final states with twoleptons with the ATLAS detector at the LHC
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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2012 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 11, 094- p.Article in journal (Refereed) Published
Abstract [en]

The results of a search for direct pair production of heavy top-quark partners in4.7 fb(-1) of integrated luminosity from p p collisions at root s = 7 TeV collected by the ATLAS detector at the LHC are reported. Heavy top-quark partners decaying into a topquark and a neutral non-interacting particle are searched for in events with two leptons inthe final state. No excess above the Standard Model expectation is observed. Limits are placed on the mass of a supersymmetric scalar top and of a spin-1/2 top-quark partner. Aspin-1/2 top-quark partner with a mass between 300 GeV and 480 GeV, decaying to a topquark and a neutral non-interacting particle lighter than 100 GeV, is excluded at 95% confidence level.

Place, publisher, year, edition, pages
2012. no 11, 094- p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-194449DOI: 10.1007/JHEP11(2012)094ISI: 000312198500029OAI: oai:DiVA.org:uu-194449DiVA: diva2:605546
Note

ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1007/JHEP11(2012)094

Available from: 2013-02-14 Created: 2013-02-14 Last updated: 2017-12-06Bibliographically approved

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Brenner, RichardBuszello, Claus PEkelöf, TordEllert, MattiasFerrari, ArnaudIsaksson, CharliePelikan, Daniel

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