In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2023, No. 7 ( 2023-07-10)
Abstract:
A measurement of the top quark pole mass $$ {m}_{\textrm{t}}^{\textrm{pole}} $$ m t pole in events where a top quark-antiquark pair ( $$ \textrm{t}\overline{\textrm{t}} $$ t t ¯ ) is produced in association with at least one additional jet ( $$ \textrm{t}\overline{\textrm{t}} $$ t t ¯ +jet) is presented. This analysis is performed using proton-proton collision data at $$ \sqrt{s} $$ 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 $$ \textrm{t}\overline{\textrm{t}} $$ t 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 $$ {m}_{\textrm{t}}^{\textrm{pole}} $$ m t pole = 172 . 93 ± 1 . 36 GeV.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP07(2023)077
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2023
detail.hit.zdb_id:
2027350-2
