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Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector
A search for leptoquark pair production decaying into $te^-\bar{t}e^+$ or $t\mu^-\bar{t}\mu^+$ in final states with multiple leptons is presented. The search is based on a dataset of $pp$ collisions at $\sqrt{s}$=13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb$^{-1}$. Events are selected with two or more light leptons (electron or muon) and at least two jets out of which at least one jet is identified as coming from a $b$-hadron. Four signal regions, with the requirement of at least three light leptons, are considered based on the number of leptons of a given flavour. The main background processes are estimated using dedicated control regions in a simultaneous fit with the signal regions to data. No excess above the Standard Model background prediction is observed and 95% confidence level limits on the production cross section times branching ratio are derived as a function of the leptoquark mass. Under the assumption of exclusive decays into $te^-$($t\mu^-$), the corresponding lower limit on the scalar mixed-generation leptoquark mass $m_{LQ_{\mathrm{mix}}^{\mathrm{d}}}$ is at 1.58 (1.59) TeV and on the vector leptoquark mass $m_{\tilde{U}_1}$ at 1.67 (1.67) TeV in the minimal coupling scenario and at 1.95 (1.95) TeV in the Yang-Mills scenario.
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Selection efficiency times acceptance summed over two signal regions for the scalar leptoquark signals as a function of $m_{\mathrm{LQ}_{mix}^{\mathrm{d}}}$, assuming...
Vector LQ signal acceptance times efficiency
Table 12 of the auxiliary material.
10.17182/hepdata.150507.v1/t2
Selection efficiency times acceptance summed over two signal regions for the vector leptoquark signals as a function of $m_{\tilde{U}_{1}}$, assuming...
Cross section upper limit at 95% CL for $tete$
Figure 9a.
10.17182/hepdata.150507.v1/t3
Summary of the observed and expected 95% CL upper limits on the cross section for $\mathrm{LQ}_{\mathrm{mix}}^{\mathrm{d}}$ pair production as a...
Cross section upper limit at 95% CL for $t\mu t\mu$
Figure 9b.
10.17182/hepdata.150507.v1/t4
Summary of the observed and expected 95% CL upper limits on the cross section for $\mathrm{LQ}_{\mathrm{mix}}^{\mathrm{d}}$ pair production as a...
Summary of observed and expected event yields (postfit) in SRs
Table 06.
10.17182/hepdata.150507.v1/t5
Summary of observed and predicted yields in the four signal region categories. The background prediction is shown after the combined...
Summary of observed and expected event yields (prefit) in SRs
Table 04 of the auxiliary material.
10.17182/hepdata.150507.v1/t6
Summary of the data, background and signal yields in the four signal region categories. The background prediction is shown before...
Summary of observed and expected event yields (prefit) in CRs
Table 02 of the auxiliary material.
10.17182/hepdata.150507.v1/t7
Summary of the data and background yields in the seven control region categories. The background prediction is shown before the...
Summary of observed and expected event yields (postfit) in CRs
Table 05 of the auxiliary material.
10.17182/hepdata.150507.v1/t8
Summary of the data and background yields in the seven control region categories. The background prediction is shown after the...
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When using this data, please cite the original publication:
ATLAS
Collaboration
(2024).
Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector. Eur.Phys.J.C 84 (2024) 818.
Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector. HEPData (collection).
https://doi.org/10.17182/hepdata.150507
or, if you prefer, a specific version of the
record:
ATLAS
Collaboration
(2024).
Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.150507.v1
You can also cite the 8 data
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ATLAS
Collaboration
(2024).
“Scalar LQ signal acceptance times efficiency” of “Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.150507.v1/t1
ATLAS
Collaboration
(2024).
“Vector LQ signal acceptance times efficiency” of “Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.150507.v1/t2
ATLAS
Collaboration
(2024).
“Cross section upper limit at 95% CL for $tete$” of “Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.150507.v1/t3
ATLAS
Collaboration
(2024).
“Cross section upper limit at 95% CL for $t\mu t\mu$” of “Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.150507.v1/t4
ATLAS
Collaboration
(2024).
“Summary of observed and expected event yields (postfit) in SRs” of “Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.150507.v1/t5
ATLAS
Collaboration
(2024).
“Summary of observed and expected event yields (prefit) in SRs” of “Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.150507.v1/t6
ATLAS
Collaboration
(2024).
“Summary of observed and expected event yields (prefit) in CRs” of “Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.150507.v1/t7
ATLAS
Collaboration
(2024).
“Summary of observed and expected event yields (postfit) in CRs” of “Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.150507.v1/t8
When using this data, please cite the original publication:
ATLAS
Collaboration
(2024).
Search for leptoquark pair production decaying into $te^- \bar{t}e^+$ or $t\mu^- \bar{t}\mu^+$ in multi-lepton final states in $pp$ collisions at 13 TeV with the ATLAS detector. Eur.Phys.J.C 84 (2024) 818.
or, if you prefer, a specific version of the
record:
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