A search for ttbar resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

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

doi:10.1007/JHEP09(2012)041

A search for ttbar resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

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

38 Citationer (Scopus)

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 tt̄ invariant mass spectrum is found to be compatible with the Standard Model prediction and 95% credibility level upper limits are derived on the tt̄ 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.

Originalsprog	Engelsk
Tidsskrift	Journal of High Energy Physics (Online)
Vol/bind	2012
Sider (fra-til)	041
ISSN	1126-6708
DOI	https://doi.org/10.1007/JHEP09(2012)041
Status	Udgivet - 21 sep. 2012

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10.1007/JHEP09(2012)041

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Aad, G., Dam, M., Hansen, J. D., Hansen, P. H., Hansen, J. B., Hansen, J. R., Heisterkamp, S. J. F., Jørgensen, M. D., Klinkby, E. B., Petersen, T. C., Nilsson, B. S., Xella, S., Mehlhase, S., Boelaert, N. M. P., & Løvschall-Jensen, A. E. (2012). A search for ttbar resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector. Journal of High Energy Physics (Online), 2012, 041. https://doi.org/10.1007/JHEP09(2012)041

Aad, G, Dam, M , Hansen, JD , Hansen, PH , Hansen, JB , Hansen, JR, Heisterkamp, SJF, Jørgensen, MD, Klinkby, EB, Petersen, TC, Nilsson, BS, Xella, S, Mehlhase, S, Boelaert, NMP & Løvschall-Jensen, AE 2012, 'A search for ttbar resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector', Journal of High Energy Physics (Online), bind 2012, s. 041. https://doi.org/10.1007/JHEP09(2012)041

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title = "A search for ttbar resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector",

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 t{\=t} invariant mass spectrum is found to be compatible with the Standard Model prediction and 95% credibility level upper limits are derived on the t{\=t} 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.",

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

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AU - Aad, G.

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Peter Henrik

AU - Hansen, Jørgen Beck

AU - Hansen, John Renner

AU - Heisterkamp, Simon Johann Franz

AU - Jørgensen, Morten Dam

AU - Klinkby, Esben Bryndt

AU - Petersen, Troels Christian

AU - Nilsson, Björn Stefan

AU - Xella, Stefania

AU - Mehlhase, Sascha

AU - Boelaert, Nele Maria Philomena

AU - Løvschall-Jensen, Ask Emil

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N2 - 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 tt̄ invariant mass spectrum is found to be compatible with the Standard Model prediction and 95% credibility level upper limits are derived on the tt̄ 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.

AB - 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 tt̄ invariant mass spectrum is found to be compatible with the Standard Model prediction and 95% credibility level upper limits are derived on the tt̄ 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.

U2 - 10.1007/JHEP09(2012)041

DO - 10.1007/JHEP09(2012)041

M3 - Journal article

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SP - 041

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

ER -

A search for ttbar resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

Abstract

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