Search for tb Resonances in Proton-Proton Collisions at vs=7¿¿TeV with the ATLAS Detector

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

doi:10.1103/PhysRevLett.109.081801

Search for tb Resonances in Proton-Proton Collisions at vs=7¿¿TeV with the ATLAS Detector

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

41 Citations (Scopus)

Abstract

This Letter presents a search for tb resonances in 1.04fb^-1 of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the invariant mass of the corresponding final state is reconstructed. The search exploits the shape of the tb invariant mass distribution compared to the expected standard model backgrounds. The model of a right-handed WR′ with standard model-like couplings is chosen as the benchmark model for this search. No statistically significant excess of events is observed in the data, and upper limits on the cross section times the branching ratio of WR′ resonances at 95% C.L. lie in the range of 6.1-1.0 pb for WR′ masses ranging from 0.5 to 2.0 TeV. These limits are translated into a lower bound on the allowed right-handed WR′ mass, giving m _WR′>1.13TeV at 95% C.L.

Original language	English
Journal	Physical Review Letters
Volume	109
Issue number	8
Pages (from-to)	081801
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.109.081801
Publication status	Published - 21 Aug 2012

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Aad, G., Dam, M., Hansen, J. B., Hansen, P. H., Hansen, J. D., Hansen, J. R., Mehlhase, S., Heisterkamp, S. J. F., Boelaert, N. M. P., Jørgensen, M. D., Petersen, T. C., Klinkby, E. B., Nilsson, B. S., Løvschall-Jensen, A. E., & Xella, S. (2012). Search for tb Resonances in Proton-Proton Collisions at vs=7¿¿TeV with the ATLAS Detector. Physical Review Letters, 109(8), 081801. https://doi.org/10.1103/PhysRevLett.109.081801

Aad, G, Dam, M , Hansen, JB , Hansen, PH , Hansen, JD , Hansen, JR, Mehlhase, S, Heisterkamp, SJF, Boelaert, NMP, Jørgensen, MD, Petersen, TC, Klinkby, EB, Nilsson, BS, Løvschall-Jensen, AE & Xella, S 2012, 'Search for tb Resonances in Proton-Proton Collisions at vs=7¿¿TeV with the ATLAS Detector', Physical Review Letters, vol. 109, no. 8, pp. 081801. https://doi.org/10.1103/PhysRevLett.109.081801

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title = "Search for tb Resonances in Proton-Proton Collisions at vs=7¿¿TeV with the ATLAS Detector",

abstract = "This Letter presents a search for tb resonances in 1.04fb-1 of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the invariant mass of the corresponding final state is reconstructed. The search exploits the shape of the tb invariant mass distribution compared to the expected standard model backgrounds. The model of a right-handed WR′ with standard model-like couplings is chosen as the benchmark model for this search. No statistically significant excess of events is observed in the data, and upper limits on the cross section times the branching ratio of WR′ resonances at 95% C.L. lie in the range of 6.1-1.0 pb for WR′ masses ranging from 0.5 to 2.0 TeV. These limits are translated into a lower bound on the allowed right-handed WR′ mass, giving m WR′>1.13TeV at 95% C.L.",

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

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T1 - Search for tb Resonances in Proton-Proton Collisions at vs=7¿¿TeV with the ATLAS Detector

AU - Aad, G.

AU - Dam, Mogens

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Hansen, John Renner

AU - Mehlhase, Sascha

AU - Heisterkamp, Simon Johann Franz

AU - Boelaert, Nele Maria Philomena

AU - Jørgensen, Morten Dam

AU - Petersen, Troels Christian

AU - Klinkby, Esben Bryndt

AU - Nilsson, Björn Stefan

AU - Løvschall-Jensen, Ask Emil

AU - Xella, Stefania

PY - 2012/8/21

Y1 - 2012/8/21

N2 - This Letter presents a search for tb resonances in 1.04fb-1 of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the invariant mass of the corresponding final state is reconstructed. The search exploits the shape of the tb invariant mass distribution compared to the expected standard model backgrounds. The model of a right-handed WR′ with standard model-like couplings is chosen as the benchmark model for this search. No statistically significant excess of events is observed in the data, and upper limits on the cross section times the branching ratio of WR′ resonances at 95% C.L. lie in the range of 6.1-1.0 pb for WR′ masses ranging from 0.5 to 2.0 TeV. These limits are translated into a lower bound on the allowed right-handed WR′ mass, giving m WR′>1.13TeV at 95% C.L.

AB - This Letter presents a search for tb resonances in 1.04fb-1 of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the invariant mass of the corresponding final state is reconstructed. The search exploits the shape of the tb invariant mass distribution compared to the expected standard model backgrounds. The model of a right-handed WR′ with standard model-like couplings is chosen as the benchmark model for this search. No statistically significant excess of events is observed in the data, and upper limits on the cross section times the branching ratio of WR′ resonances at 95% C.L. lie in the range of 6.1-1.0 pb for WR′ masses ranging from 0.5 to 2.0 TeV. These limits are translated into a lower bound on the allowed right-handed WR′ mass, giving m WR′>1.13TeV at 95% C.L.

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DO - 10.1103/PhysRevLett.109.081801

M3 - Journal article

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SN - 0031-9007

VL - 109

SP - 081801

JO - Physical Review Letters

JF - Physical Review Letters

IS - 8

ER -

Search for tb Resonances in Proton-Proton Collisions at vs=7¿¿TeV with the ATLAS Detector

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