Speaker
Description
We present precise measurements of the mass and decay width of the top quark in the t-channel, the dominant production mode for single top quarks at the LHC. The final state includes a top quark and a light quark, resulting in at least two jets, one of which originates from the hadronization of a b-quark, along with an isolated high-momentum lepton (electron or muon) and significant missing transverse momentum from the escaping neutrino in the W boson decay. The analysis uses proton-proton collision data collected by the CMS experiment during 2016–2018. Standard Model backgrounds are studied in complementary regions, and a Deep Neural Network is employed to distinguish signal from background. Additionally, we estimate the expected sensitivity on the top quark mass and width through a simultaneous fit of both parameters.
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