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T: Fachverband Teilchenphysik

T 61: Experimentelle Methoden II

T 61.7: Vortrag

Mittwoch, 21. März 2018, 18:00–18:15, Z6 - SR 1.013

Performance of pileup mitigation in jets using Constituent Subtraction at the ATLAS experiment — •Peter Berta and Lucia Masetti — Institut für Physik, JGU Mainz, Staudingerweg 7, Mainz, Germany

The ability to correct jet kinematics and substructure for simultaneous proton-proton interactions (pileup) largely determines the precision of measurements and searches at the Large Hadron Collider.

In this talk, the performance of the Constituent Subtraction method for pileup mitigation in jets at the ATLAS experiment will be presented. This novel method corrects the jet inputs from the whole event before jet clustering based on the average pileup density in the event. Phenomenological studies showed potential for sizable improvements in performance for small- and large-radius jets compared to the previously used methods. Large-radius jets are particularly interesting when they contain highly boosted hadronic decays of W bosons and top quarks. They can be recognized using jet substructure variables whose performance is also expected to profit from the new method.