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Measurement of the top quark mass with lepton+jets final states using p p collisions at s√=13TeV
Journal article   Open access   Peer reviewed

Measurement of the top quark mass with lepton+jets final states using p p collisions at s√=13TeV

CMS Collaboration, Maria Canelli, Benjamin Kilminster, Lea Caminada, Cristina Botta, Pascal Baertschi, Tiziano Bevilacqua, Danyyl Brzhechko, Kyle Cormier, Adinda Wit, …
The European Physical Journal C, Vol.78(11), 891
11/02/2018
DOI: 10.1140/epjc/s10052-018-6332-9
url
https://doi.org/10.1140/epjc/s10052-018-6332-9View
Published (Version of record) Open Access

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Abstract

The mass of the top quark is measured using a sample of tt¯tt¯ events collected by the CMS detector using proton-proton collisions at s√=13�=13TeVTeV at the CERN LHC. Events are selected with one isolated muon or electron and at least four jets from data corresponding to an integrated luminosity of 35.9fb−1fb−1. For each event the mass is reconstructed from a kinematic fit of the decay products to a tt¯tt¯ hypothesis. Using the ideogram method, the top quark mass is determined simultaneously with an overall jet energy scale factor (JSF), constrained by the mass of the W boson in qq¯¯¯′qq¯′ decays. The measurement is calibrated on samples simulated at next-to-leading order matched to a leading-order parton shower. The top quark mass is found to be 172.25±0.08(stat+JSF)±0.62(syst)GeV172.25±0.08(stat+JSF)±0.62(syst)GeV. The dependence of this result on the kinematic properties of the event is studied and compared to predictions of different models of tt¯tt¯ production, and no indications of a bias in the measurements are observed.
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