Measurement of the top quark pole mass using $ \textrm{t}\overline{\textrm{t}} $+jet events in the dilepton final state in proton-proton collisions at $ \sqrt{s} $ = 13 TeV
(2023) Journal of High Energy Physics — Vol. 07 (2023)
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- Abstract
- A measurement of the top quark pole mass $ {m}_{\textrm{t}}^{\textrm{pole}} $ in events where a top quark-antiquark pair ($ \textrm{t}\overline{\textrm{t}} $) is produced in association with at least one additional jet ($ \textrm{t}\overline{\textrm{t}} $+jet) is presented. This analysis is performed using proton-proton collision data at $ \sqrt{s} $ = 13 TeV collected by the CMS experiment at the CERN LHC, corresponding to a total integrated luminosity of 36.3 fb$^{−1}$. Events with two opposite-sign leptons in the final state (e$^{+}$e$^{−}$, μ$^{+}$μ$^{−}$, e$^{±}$μ$^{∓}$) are analyzed. The reconstruction of the main observable and the event classification are optimized using multivariate analysis techniques based on machine learning. The production cross section is measured as a function of the inverse of the invariant mass of the $ \textrm{t}\overline{\textrm{t}} $+jet system at the parton level using a maximum likelihood unfolding. Given a reference parton distribution function (PDF), the top quark pole mass is extracted using the theoretical predictions at next-to-leading order. For the ABMP16NLO PDF, this results in $ {m}_{\textrm{t}}^{\textrm{pole}} $ = 172.93 ± 1.36 GeV.[graphic not available: see fulltext]
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Benecke, A., Bruno, G., Bury, F., Caputo, C., David, P., Delaere, C., Donertas, I. S., Giammanco, A., Jaffel, K., Jain, S., Lemaitre, V., Mondal, K., Prisciandaro, J., Taliercio, A., Tran, T. T., Vischia, P., Wertz, S., CMS, Bethani, A., & et al. (2023). Measurement of the top quark pole mass using $ \textrm{t}\overline{\textrm{t}} $+jet events in the dilepton final state in proton-proton collisions at $ \sqrt{s} $ = 13 TeV. Journal of High Energy Physics, 07. https://doi.org/10.1007/JHEP07(2023)077 (Original work published 2023)