Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 29: Top quark decay and top properties I

T 29.3: Vortrag

Dienstag, 16. März 2021, 16:35–16:50, Td

Measurement of the jet mass in decays of boosted top quarks using the full Run-2 dataset of the CMS detector — •Alexander Paasch, Johannes Haller, Roman Kogler, and Dennis Schwarz — Institut für Experimentalphysik, Universität Hamburg

Hadronic decays of boosted top quarks result in single large-radius jets. The mass of the jets is sensitive to the top quark mass. At the LHC, it is commonly used as a discriminator against jets originating from light quarks and gluons. For this reason, a measurement of the jet mass of boosted top quark decays is of special interest for both, studies of the Standard Model and searches for new physics.
In this talk, a measurement of the jet mass is presented using the full Run-2 dataset of the CMS experiment corresponding to a significantly larger statistics than an earlier result. In addition, the two dominant systematic uncertainties, namely the uncertainties related to final state radiation and the jet energy scale, are significantly reduced by measurements in dedicated control regions.