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Towards a simultaneous measurement of the top quark mass and decay width with single top quark events at CMS

We report a precise measurement of the mass of the top quark in the $\it{t}$-channel, which is the most dominant production process for single top quarks at the LHC. The final state comprises a top quark along with a light quark, giving rise to at least two jets, of which one arises from the hadroni...

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Detalles Bibliográficos
Autor principal: Kumar, Mintu
Lenguaje:eng
Publicado: 2023
Materias:
Acceso en línea:http://cds.cern.ch/record/2866333
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author Kumar, Mintu
author_facet Kumar, Mintu
author_sort Kumar, Mintu
collection CERN
description We report a precise measurement of the mass of the top quark in the $\it{t}$-channel, which is the most dominant production process for single top quarks at the LHC. The final state comprises a top quark along with a light quark, giving rise to at least two jets, of which one arises from the hadronization of a b-quark, an isolated high-momentum lepton (electron or muon), and a large missing transverse momentum due to an escaping neutrino from the W boson decay. The study uses proton-proton collision data recorded by the CMS experiment during 2016 at $\sqrt{s}=13$ TeV. Dominant standard model backgrounds are studied in complementary regions defined based on the number of b- and light-quark jets in the final state. A multivariate technique that relies on boosted decision tree and deep neural networks is deployed to separate signal from backgrounds. The top-quark mass is reconstructed using kinematic information from the W boson and the b jet. We obtain the top quark mass from a fit and investigating further to study a simultaneous measurement of mass and width.
id cern-2866333
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2023
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spelling cern-28663332023-07-31T19:08:00Zhttp://cds.cern.ch/record/2866333engKumar, MintuTowards a simultaneous measurement of the top quark mass and decay width with single top quark events at CMSDetectors and Experimental TechniquesWe report a precise measurement of the mass of the top quark in the $\it{t}$-channel, which is the most dominant production process for single top quarks at the LHC. The final state comprises a top quark along with a light quark, giving rise to at least two jets, of which one arises from the hadronization of a b-quark, an isolated high-momentum lepton (electron or muon), and a large missing transverse momentum due to an escaping neutrino from the W boson decay. The study uses proton-proton collision data recorded by the CMS experiment during 2016 at $\sqrt{s}=13$ TeV. Dominant standard model backgrounds are studied in complementary regions defined based on the number of b- and light-quark jets in the final state. A multivariate technique that relies on boosted decision tree and deep neural networks is deployed to separate signal from backgrounds. The top-quark mass is reconstructed using kinematic information from the W boson and the b jet. We obtain the top quark mass from a fit and investigating further to study a simultaneous measurement of mass and width.CMS-CR-2023-074oai:cds.cern.ch:28663332023-07-10
spellingShingle Detectors and Experimental Techniques
Kumar, Mintu
Towards a simultaneous measurement of the top quark mass and decay width with single top quark events at CMS
title Towards a simultaneous measurement of the top quark mass and decay width with single top quark events at CMS
title_full Towards a simultaneous measurement of the top quark mass and decay width with single top quark events at CMS
title_fullStr Towards a simultaneous measurement of the top quark mass and decay width with single top quark events at CMS
title_full_unstemmed Towards a simultaneous measurement of the top quark mass and decay width with single top quark events at CMS
title_short Towards a simultaneous measurement of the top quark mass and decay width with single top quark events at CMS
title_sort towards a simultaneous measurement of the top quark mass and decay width with single top quark events at cms
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/2866333
work_keys_str_mv AT kumarmintu towardsasimultaneousmeasurementofthetopquarkmassanddecaywidthwithsingletopquarkeventsatcms