Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC

G. Aad; T. Abajyan; Mogens Dam; Jørgen Beck Hansen; Peter Henrik Hansen; John Renner Hansen; Jørn Dines Hansen; Morten Dam Jørgensen; Nele Maria Philomena Boelaert; Simon Johann Franz Heisterkamp; Ask Emil Løvschall-Jensen; Esben Bryndt Klinkby; Björn Stefan Nilsson; Sascha Mehlhase; Troels Christian Petersen; Stefania Xella

doi:10.1007/JHEP11(2012)094

Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC

G. Aad, T. Abajyan, Mogens Dam, Jørgen Beck Hansen, Peter Henrik Hansen, John Renner Hansen, Jørn Dines Hansen, Morten Dam Jørgensen, Nele Maria Philomena Boelaert, Simon Johann Franz Heisterkamp, Ask Emil Løvschall-Jensen, Esben Bryndt Klinkby, Björn Stefan Nilsson, Sascha Mehlhase, Troels Christian Petersen, Stefania Xella

Experimental Particle Physics

46 Citations (Scopus)

Abstract

The results of a search for direct pair production of heavy top-quark partners in 4.7 fb^–1 of integrated luminosity from pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC are reported. Heavy top-quark partners decaying into a top quark and a neutral non-interacting particle are searched for in events with two leptons in the 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. A spin-1/2 top-quark partner with a mass between 300 GeV and 480 GeV, decaying to a top quark and a neutral non-interacting particle lighter than 100 GeV, is excluded at 95% confidence level.

Original language	English
Journal	Journal of High Energy Physics (Online)
Volume	2012
Issue number	11
Pages (from-to)	094
ISSN	1126-6708
DOIs	https://doi.org/10.1007/JHEP11(2012)094
Publication status	Published - 1 Nov 2012

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Aad, G., Abajyan, T., Dam, M., Hansen, J. B., Hansen, P. H., Hansen, J. R., Hansen, J. D., Jørgensen, M. D., Boelaert, N. M. P., Heisterkamp, S. J. F., Løvschall-Jensen, A. E., Klinkby, E. B., Nilsson, B. S., Mehlhase, S., Petersen, T. C., & Xella, S. (2012). Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC. Journal of High Energy Physics (Online), 2012(11), 094. https://doi.org/10.1007/JHEP11(2012)094

Aad, G, Abajyan, T, Dam, M , Hansen, JB , Hansen, PH , Hansen, JR , Hansen, JD, Jørgensen, MD, Boelaert, NMP, Heisterkamp, SJF, Løvschall-Jensen, AE, Klinkby, EB, Nilsson, BS, Mehlhase, S, Petersen, TC & Xella, S 2012, 'Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC', Journal of High Energy Physics (Online), vol. 2012, no. 11, pp. 094. https://doi.org/10.1007/JHEP11(2012)094

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title = "Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC",

abstract = "The results of a search for direct pair production of heavy top-quark partners in 4.7 fb–1 of integrated luminosity from pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC are reported. Heavy top-quark partners decaying into a top quark and a neutral non-interacting particle are searched for in events with two leptons in the 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. A spin-1/2 top-quark partner with a mass between 300 GeV and 480 GeV, decaying to a top quark and a neutral non-interacting particle lighter than 100 GeV, is excluded at 95% confidence level.",

author = "G. Aad and T. Abajyan and Mogens Dam and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Hansen, {John Renner} and Hansen, {J{\o}rn Dines} and J{\o}rgensen, {Morten Dam} and Boelaert, {Nele Maria Philomena} and Heisterkamp, {Simon Johann Franz} and L{\o}vschall-Jensen, {Ask Emil} and Klinkby, {Esben Bryndt} and Nilsson, {Bj{\"o}rn Stefan} and Sascha Mehlhase and Petersen, {Troels Christian} and Stefania Xella",

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AU - Aad, G.

AU - Abajyan, T.

AU - Dam, Mogens

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, John Renner

AU - Hansen, Jørn Dines

AU - Jørgensen, Morten Dam

AU - Boelaert, Nele Maria Philomena

AU - Heisterkamp, Simon Johann Franz

AU - Løvschall-Jensen, Ask Emil

AU - Klinkby, Esben Bryndt

AU - Nilsson, Björn Stefan

AU - Mehlhase, Sascha

AU - Petersen, Troels Christian

AU - Xella, Stefania

PY - 2012/11/1

Y1 - 2012/11/1

N2 - The results of a search for direct pair production of heavy top-quark partners in 4.7 fb–1 of integrated luminosity from pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC are reported. Heavy top-quark partners decaying into a top quark and a neutral non-interacting particle are searched for in events with two leptons in the 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. A spin-1/2 top-quark partner with a mass between 300 GeV and 480 GeV, decaying to a top quark and a neutral non-interacting particle lighter than 100 GeV, is excluded at 95% confidence level.

AB - The results of a search for direct pair production of heavy top-quark partners in 4.7 fb–1 of integrated luminosity from pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC are reported. Heavy top-quark partners decaying into a top quark and a neutral non-interacting particle are searched for in events with two leptons in the 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. A spin-1/2 top-quark partner with a mass between 300 GeV and 480 GeV, decaying to a top quark and a neutral non-interacting particle lighter than 100 GeV, is excluded at 95% confidence level.

U2 - 10.1007/JHEP11(2012)094

DO - 10.1007/JHEP11(2012)094

M3 - Journal article

SN - 1126-6708

VL - 2012

SP - 094

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 11

ER -

Search for a heavy top-quark partner in final states with two leptons with the ATLAS detector at the LHC

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