Master thesis defence by Freja Thoresen – University of Copenhagen

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Master thesis defence by Freja Thoresen

Wavelets & Information Theory for Pile-Up Removal


At the Large Hadron Collider (LHC) at CERN the luminosity and momentum of the colliding protons are increasing in the Run 2 of the LHC compared to Run 1. When the luminosity increases it leads to several protons colliding at the same time, we call this pile-up. The consequence of pile-up can be smearing of signals in the detectors, and it can also have a big effect of the reconstruction of objects and particles. This has especially a huge effect on the reconstruction of missing transverse energy and jets.

In this talk methods named Wavelets and maximum entropy are suggested as methods for removal of pile-up. These methods were tested by reconstruction of missing transverse energy.