Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at √s=13 TeV with the ATLAS detector
Inclusive cross-sections for top-quark pair production in association with charm quarks are measured with proton-proton collision data at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 140 fb−1, collected with the ATLAS experiment at the LHC between 2015 and 2018. The...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
4 December 2024
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| In: |
Physics letters
Year: 2025, Jahrgang: 860, Pages: 1-28 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2024.139177 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.physletb.2024.139177 Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269324007354 
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| Verfasserangaben: | the ATLAS Collaboration |
MARC
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| 245 | 1 | 0 | |a Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at √s=13 TeV with the ATLAS detector |c the ATLAS Collaboration |
| 246 | 3 | 0 | |a sqrt |
| 246 | 3 | 3 | |a Measurement of top-quark pair production in association with charm quarks in proton-proton collisions at square root s =13 TeV with the ATLAS detector |
| 264 | 1 | |c 4 December 2024 | |
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| 500 | |a The ATLAS Collaboration: G. Aad, A. Ackermann, L.M. Baltes, F. Bartels, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, T. Mkrtchyan, P.S. Ott, D.F. Rassloff, L. Sanfilippo, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, J. Zinsser [und 2901 weitere] | ||
| 500 | |a Gesehen am 03.07.2025 | ||
| 520 | |a Inclusive cross-sections for top-quark pair production in association with charm quarks are measured with proton-proton collision data at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 140 fb−1, collected with the ATLAS experiment at the LHC between 2015 and 2018. The measurements are performed by requiring one or two charged leptons (electrons and muons), two b-tagged jets, and at least one additional jet in the final state. A custom flavor-tagging algorithm is employed for the simultaneous identification of b-jets and c-jets. In a fiducial phase space that replicates the acceptance of the ATLAS detector, the cross-sections for tt¯+≥2c and tt¯+1c production are measured to be 1.28−0.24+0.27pb and 6.4−0.9+1.0pb, respectively. The measurements are primarily limited by uncertainties in the modeling of inclusive tt¯ and tt¯+bb¯ production, in the calibration of the flavor-tagging algorithm, and by data statistics. Cross-section predictions from various tt¯ simulations are largely consistent with the measured cross-section values, though all underpredict the observed values by 0.5 to 2.0 standard deviations. In a phase-space volume without requirements on the tt¯ decay products and the jet multiplicity, the cross-section ratios of tt¯+≥2c and tt¯+1c to total tt¯+jets production are determined to be (1.23±0.25)% and (8.8±1.3)%. | ||
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