Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 27: QCD I

T 27.7: Talk

Tuesday, March 16, 2021, 17:30–17:45, Tb

Pileup mitigation in CMS — •Ksenia de Leo, Anna Benecke, Johannes Haller, Andreas Hinzmann, Roman Kogler, and Matthias Schröder — Institut für Experimentalphysik, Universität Hamburg

The high instantaneous luminosity reached by the LHC during Run-2 leads to an increased number of additional collisions in each bunch crossing (pileup). An important experimental challenge is the separation of particles produced in the interaction of interest from those resulting from pileup interactions.

This talk will present studies of the Pile Up Per Particle Identification (PUPPI) technique to mitigate effects from pileup on the object reconstruction in the CMS detector. The algorithm will be described together with challenges in its application. In addition, the optimisation of the algorithm for the final reconstruction of Run-2 data will be presented in detail.