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Jet Energy Scale. March 31, 2009. Jet energy vs parton energy. Eta-dependent corrections : even calorimeter response Multiple interactions : garbage from extra ppbar events in the same BC Absolute energy scale : conversion from calo measurement to underlying jet
Jet/Energy flow. Iacopo Vivarelli INFN e Università, Pisa. Introduction. I calorimetri di ATLAS e CMS Algoritmi di clusterizzazione nei calorimetri Algoritmi di ricostruzione dei jet Calibrazione al particle jet (e confronto dati/MC) Energy flow Soglie di trigger sui jet
jet en corrections vs jet energy. P.Azzurri – WWTF 21 /04/04. two jet corrections @Zpeak. Z peak jet corrections: ~1.00 for |cos( θ )|<0.7 1.00-1.02 for |cos( θ )|>0.7. two jet corrections @Zpeak. data/MC ratio of averages of E jet /E beam in the [0-2] window. two jet corrections @LEP2.
Jet Energy Scale Calibration. Anwar A Bhatti The Rockefeller University CMS Jet Workshop December 14, 2006. Outline. Jet fragmentation (2-3 slides) Calorimeter Response (1 slide) Multi Step Approach to Jet Corrections Noise and Pile-up (suppressed by tower level cuts, not discussed)
PFA Jet Energy Measurements. Lei Xia ANL-HEP. ILC requires precise measurement for jet energy/di-jet mass. At LEP, ALEPH got a jet energy resolution of ~60%/sqrt(E) Achieved with Particle Flow Algorithm (Energy Flow, at the time) on a detector not optimized for PFA
Inclusive Jet Cross Section Jet Energy Corrections. Anwar Ahmad Bhatti DOE Meeting December 2, 2004. QCD and Jet Physics. All production processes are “QCD related” Optimal understanding is basic for all analyses: - Main parameters (ex: gluon PDFs in high x)
Jet Energy Corrections in CMS. Daniele del Re Universita’ di Roma “La Sapienza” and INFN Roma. Outline. Summary of effects to be corrected in jet reconstruction CMS proposal: factorization of corrections data driven corrections Strategy to extract each correction factor from data
Jet energy scale: Part III. Mario Martinez-Perez IFAE-Barcelona. Ariel Schwartzman SLAC. Esteban Fullana Torregrosa High Energy Physics Division Argonne National Laboratory. Acknowledgments.
Jet Energy Scale at CMS. Anwar A Bhatti June 8, 2006 XII International Conference on Calorimetry Chicago IL, USA. Jets at LHC/CMS. CMS is pp experiment at Large Hadron Collider at √s=14 TeV to find Higgs bosons, SUSY, anything beyond SM. Good understanding of jets are needed to