SMuK 2023 – scientific programme

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T: Fachverband Teilchenphysik

T 3: Top I

T 3.4: Talk

Monday, March 20, 2023, 17:15–17:30, HSZ/0401

Kinematic Fit for Top-Antitop Production at LHC — •Constant Peeters, Patrick Connor, Johannes Lange, Hartmut Stadie, and Peter Schleper — Institut für Experimentalphysik, Universität Hamburg

The decay products of top quark pairs in proton-proton collisions at the LHC can be reconstructed independently of one another using the particle flow algorithm. A fit utilising physical properties of the event topology may be used in addition to further constrain their kinematics. This may be beneficial to measure fundamental quantities of the top quark, such as its mass. In this work, we present the general technique and investigate the impact of the jet energy resolution on the fit results. The kinematic fitting package KinFitter, commonly used within the CMS software framework, is utilized with the aim of ensuring usability independent of the CMS software stack.