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T: Fachverband Teilchenphysik

T 65: Top quarks: differential cross sections

T 65.6: Vortrag

Mittwoch, 1. April 2020, 17:45–18:00, H-HS VIII

Measurement of multi-differential cross sections for the production of top quark pairs plus additional jets in pp collisions at sqrt(s)=13TeV. — Maria Aldaya, Olaf Behnke, Henriette Petersen, Mykola Savitskyi, •Rafael E. Sosa Ricardo, and Sebastian Wuchterl — Deutsches Elektronen-Synchrotron DESY.

Measurements of multi-differential cross sections for top quark pair (tt) production in pp collisions at a centre-of-mass energy of 13 TeV using events containing two opposite-sign leptons will be presented. The analyzed dataset was recorded with the CMS detector during the years 2016, 2017 and 2018, corresponding to an integrated luminosity of 137 fb⁻¹. The tt cross sections are measured double and triple-differentially as a function of the tt system kinematics, the top quark and of additional jets in the event.

This talk comprises an overview of the analysis starting with the event selection, kinematic reconstruction of the tt system and the cross section unfolding procedure. First cross section results will be compared to MC predictions based on NLO QCD matched to parton showers.