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Measurement of the top-quark pole mass in dileptonic tt¯ + 1-jet events at s=13 TeV with the ATLAS experiment
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Measurement of the top-quark pole mass in dileptonic tt¯ + 1-jet events at s=13 TeV with the ATLAS experiment

G. Aad, E. Aakvaag, B. Abbott, S. Abdelhameed, K. Abeling, N. J. Abicht, S. H. Abidi, M. Aboelela, A. Aboulhorma, H. Abramowicz, …
The journal of high energy physics, 卷.2025(12), 23
03/12/2025
Web of Science ID: WOS:001641314200001

摘要

Classical and Quantum Gravitation Elementary Particles Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Quantum Physics Regular Article - Experimental Physics Relativity Theory String Theory
A bstract A measurement of the top-quark pole mass m t pole is presented in t t ¯ events with an additional jet, t t ¯ + 1-jet, produced in pp collisions at s = 13 TeV. The data sample, recorded with the ATLAS experiment during Run 2 of the LHC, corresponds to an integrated luminosity of 140 fb − 1 . Events with one electron and one muon of opposite electric charge in the final state are selected to measure the t t ¯ + 1-jet differential cross-section as a function of the inverse of the invariant mass of the t t ¯ + 1-jet system. Iterative Bayesian Unfolding is used to correct the data to enable comparison with fixed-order calculations at next-to-leading-order accuracy in the strong coupling. The process pp → t t ¯ j 2 → 3 , where top quarks are taken as stable particles, and the process pp → b b ¯ l + ν l − ν ¯ j 2 → 7 , which includes top-quark decays to the dilepton final state and off-shell effects, are considered. The top-quark mass is extracted using a χ 2 fit of the unfolded normalized differential cross-section distribution. The results obtained with the 2 → 3 and 2 → 7 calculations are compatible within theoretical uncertainties, providing an important consistency check. The more precise determination is obtained for the 2 → 3 measurement: m t pole = 170.7 ± 0.3 stat . ± 1.4 syst . ± 0.3 scale ± 0.2 PDF ⊕ α S GeV, which is in good agreement with other top-quark mass results.

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引用書目主題
5 Physics
5.9 Particles & Fields
5.9.19 Beyond Standard Model
Web Of Science研究領域
Physics, Particles & Fields
ESI研究領域
Physics

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