{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.155341.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2832100"}},{"@id":"https://doi.org/10.1007/JHEP02(2025)084","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ATLAS Collaboration"},"creator":{"@type":"Organization","name":"ATLAS Collaboration"},"datePublished":"2024","description":"A search for the production of top-quark pairs with the same electric charge ($tt$ or $\\bar{t}\\bar{t}$) is presented. The analysis uses proton-proton collision data at $\\sqrt{s}=13$ TeV, recorded by the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 140 fb$^{-1}$. Events with two same-charge leptons and at least two $b$-tagged jets are selected. Neural networks are employed to define two selections sensitive to additional couplings beyond the Standard Model that would enhance the production rate of same-sign top-quark pairs. No significant signal is observed, leading to an upper limit on the total production cross-section of same-sign top-quark pairs of 1.6 fb at 95$\\%$ confidence level. Corresponding limits on the three Wilson coefficients associated with the ${\\cal O}_{tu}^{(1)}$, ${\\cal O}_{Qu}^{(1)}$, and ${\\cal O}_{Qu}^{(8)}$ operators in the Standard Model Effective Field Theory framework are derived.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t1","@type":"Dataset","description":"Distributions of the $\\mathrm{NN^{SvsB}}$ output for data and the expected background after the likelihood fit in the $SR_{ctu ++}$ signal...","name":"Figure 6 top left"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t2","@type":"Dataset","description":"Distributions of the $\\mathrm{NN^{SvsB}}$ output for data and the expected background after the likelihood fit in the $SR_{ctu --}$ signal...","name":"Figure 6 top right"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t3","@type":"Dataset","description":"Distributions of the $\\mathrm{NN^{SvsB}}$ output for data and the expected background after the likelihood fit in the $SR_{cQu ++}$ signal...","name":"Figure 6 bottom left"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t4","@type":"Dataset","description":"Distributions of the $\\mathrm{NN^{SvsB}}$ output for data and the expected background after the likelihood fit in the $SR_{cQu --}$ signal...","name":"Figure 6 bottom right"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t5","@type":"Dataset","description":"Summary of the observed and predicted number of events in the five 2$\\ell$ control regions. The background prediction is shown...","name":"Table 3"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t6","@type":"Dataset","description":"Summary of the observed and predicted number of events in the four 3$\\ell$ control regions. The background prediction is shown...","name":"Table 4"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t7","@type":"Dataset","description":"Comparison of the observed limits on the three WCs to the limit obtained by the ATLAS Run~1 analysis of events...","name":"Figure 7"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t8","@type":"Dataset","description":"Observed lower limits at 95$\\%$ confidence level on the scale of new physics $\\Lambda$ for Wilson coefficient values of 0.01,...","name":"Figure 8"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t9","@type":"Dataset","description":"Observed and expected limits at 95$\\%$ confidence level on the cross-section of $\\sigma(pp \\rightarrow tt)$.","name":"Cross-section limit on $\\sigma(pp \\rightarrow tt)$"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t10","@type":"Dataset","description":"2D likelihood scans of the Wilson coefficients $c_{tu}^{(1)}$ versus $c_{Qu}^{(1)}$. The new-physics scale is set to $\\Lambda = 1 \\,...","name":"Figure 9(a)"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t11","@type":"Dataset","description":"2D likelihood scans of the Wilson coefficients $c_{tu}^{(1)}$ versus $c_{Qu}^{(8)}$. The new-physics scale is set to $\\Lambda = 1 \\,...","name":"Figure 9(b)"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t12","@type":"Dataset","description":"2D likelihood scans of the Wilson coefficients $c_{Qu}^{(1)}$ versus $c_{Qu}^{(8)}$. The new-physics scale is set to $\\Lambda = 1 \\,...","name":"Figure 9(c)"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t13","@type":"Dataset","description":"1D-likelihood scan for $c_{tu}^{(1)}$. The observed and expected limits at 68\\% and 95\\% confidence level (CL) can be read off...","name":"Figure 01a (Auxiliary material)"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t14","@type":"Dataset","description":"1D-likelihood scan for $c_{Qu}^{(1)}$. The observed and expected limits at 68\\% and 95\\% confidence level (CL) can be read off...","name":"Figure 01b (Auxiliary material)"},{"@id":"https://doi.org/10.17182/hepdata.155341.v1/t15","@type":"Dataset","description":"1D-likelihood scan for $c_{Qu}^{(8)}$. The observed and expected limits at 68\\% and 95\\% confidence level (CL) can be read off...","name":"Figure 01c (Auxiliary material)"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2832100?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/155341"}],"inLanguage":"en","name":"Search for same-charge top-quark pair production in $pp$ collisions at $\\sqrt{s}=$ 13 TeV with the ATLAS detector","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2832100?version=1","version":1}