Jets and EtMiss Reconstruction

Jets and EtMiss Reconstruction

The Sheffield group studies jet reconstruction from a number of different persepectives. We have developed a data-driven technique to measure the jet response shape from LHC collision data, which can then be used to generate large samples of QCD multi-jet events using a set of seed events in collision data, which are then smeared many times using the data-derived jet response shape. Details of this technique can be found in this paper - Search for Squarks and Gluinos with the ATLAS Detector in Final States with Jets and Missing Transverse Momentum using 4.7 fb^-1 of sqrt(s) = 7 TeV Proton-Proton Colliison Data, Phys. Rev. D 87, 012008, January 2013.

We have studied the usage of energy flow (also known as particle flow) techniques for jet reconstruction, and in the past studied the particle composition of jets which indicates the single particle enegry scales relevant for jet reconstruction and hence which transverse momentum ranges were relevant to apply the E/P technique too. Studies on this were detailed in the E/p Performance for Charged Hadrons chapter of the ATLAS CSC book, of which Mark Hodgkinson was a co-editor. We have also undertaken studies in measuring the jet-energy scale using the di-jet balancing technique in the past - one of two analysis techniques we currently use to measure the jet response shape in collision data.

Mark Hodgkinson was recently co-convenor of the Jet Software and Validation sub-group between October 2014 and October 2015.

Department of Physics and Astronomy, University of Sheffield, Hounsfield Road, Sheffield S3 7RH, UK


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