Martinelli, L. (2024) Inclusive and differential σtt¯ measurements using the ATLAS detector. Il nuovo cimento C, 47 (1). pp. 1-5. ISSN 1826-9885
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Abstract
Measurements of the total and differential top-quark pair-production cross-sections in proton proton collisions at 13 TeV with the ATLAS detector at the Large Hadron Collider (LHC) are presented. The measurements use data collected by ATLAS during the entire LHC Run 2 (2015 - 2018) corresponding to an integrated luminosity of 140 fb−1. The measurements are performed in the di-lepton channel, requiring an opposite-charge high-pT electron-muon pair and b-tagged jets. The experimental uncertainties due to the identification of b-quark jets are constrained in-situ by data. The total cross-section is compared to predictions by theoretical QCD calculations at next-to-next-to-leading (NNLO) order. Absolute and normalised single- and double-differential cross-sections are calculated as a function of single-lepton and dilepton kinematic variables, featuring finer granularity and extended kinematic range compared to previous ATLAS measurements. The results are compared with multiple predictions from next-to-leading-order QCD matrixelement generators matched with parton-shower generators.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 11 Dec 2023 03:00 |
| Last Modified: | 11 Dec 2023 03:00 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/22557 |
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