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.

We have studied the usage of energy flow (also known as particle flow) techniques for jet reconstruction, and in the recent 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 - one of two analysis techniques we currently use to measure the jet response shape in collision data. Some internal ATLAS talks on this work (note the latest talks on energy flow can be found here) are given in the following talks:

2011

• Jets and ETMiss Performance Considerations for Higgs Analyses (includes latest energy flow jets results for ttbar events) (M.Hodgkinson - ATLAS Higgs HSG3 Workshop, Dubna, Russia, May 2011)

2010

• Investigating the Local Hadronic Scale in Data and Monte Carlo, using Tau Decays (M. Hodgkinson - ATLAS Jet ETMiss Performance Meeting, October 2010)

2008

• Status of Jet 8 CSC Note (M. Hodgkinson - Jet ETMiss Performance Meeting at ATLAS T/P Week February 2008)

• Jet Calibration in ATLAS (M. Hodgkinson - ATLAS UK Meeting January 2008 - IPPP)

2007

• Energy Flow and Jet Calibration (M. Hodgkinson - Artemis Meeting, Chalkidiki, Greece, September 2007)

• Relative Jet Energy Scale Measurements with Dijet Balancing (P. Hodgson and R. Duxfield - Jet ETMiss Phone Meeting August 2007)

• Update on Jet Fragmentation (M. Hodgkinson Jet EtMiss Phone Meeting - 22 August 2007)

• Performance of eflowRec with CSC Data (M. Hodgkinson - June 2007)

• Jet Fragmentation in 12.0.6 (M. Hodgkinson - Single Hadron Energy Scale Meeting - June 2007)

• Progress in Energy Flow for Jets (M. Hodgkinson - Jet EtMiss Phone Meeting - March 2007)

• Plans for Jet Energy Scale Measurement with Dijet Pt Balance (P. Hodgson - Jet ETMiss Phone Meeting January 2007)

2006

• Usage of Tracking in Jet Measurements (ATLAS Calorimeter Calibration Workshop September 2006)

• Update on B_Field Effects in Jet Reconstruction (Jet EtMiss Phone Meeting 28 June 2006 - M.Hodgkinson)

• Jet Fragmentation/B-Field Studies (Munich Atlas Hadronic Calibration Workshop May 2006 - M.Hodgkinson)

• Document:  QCD Jet Fragmentation Studies in Rome Monte Carlo Data - M.Hodgkinson March 2006

2005

• Update on Jet Fragmentation Studies (Jets/EtMiss Meeting November 2005 - M.Hodgkinson)

• Jet Fragmentation studies (Jets/EtMiss Meeting October 2005 - M.Hodgkinson)

• Energy Distribution of Single Particles in Jets (Hadronic Calibration Meeting September 2005 - M.Hodgkinson)