| CMS Note | |
| Report number | CMS-CR-2009-314 |
| Title | Jet Energy Corrections at CMS |
| Author(s) | Santocchia, Attilio (INFN, Perugia) |
| Publication | 2009 |
| Collaboration | CMS Collaboration |
| Imprint | 12 Oct 2009 |
| Number of pages | 10 |
| Presented at | IEEE Nuclear Science Symposium And Medical Imaging Conference, Orlando, FL, USA, 25 Oct - 31 Oct 2009 |
| Subject category | Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN LHC ; CMS |
| Keywords | General |
| Abstract | Many physics measurements in CMS will rely on the precise reconstruction of Jets. Correction of the raw jet energy measured by the CMS detector will be a fundamental step for most of the analysis where hadron activity is investigated. Jet correction plans in CMS have been widely studied for different conditions: at stat-up simulation tuned on test-beam data will be used. Then data-driven methods will be available and finally, simulation tuned on collision data will give us the ultimate procedure for calculating jet corrections. Jet transverse energy is corrected first for pile-up and noise offset; correction for the response of the calorimeter as a function of jet pseudorapidity relative to the barrel comes afterwards and correction for the absolute response as a function of transverse momentum in the barrel is the final standard sub-correction applied. Other effects like flavour and parton correction will be optionally applied on the Jet $E_T$ depending on the measurement requests. In this paper we discuss the actual status of the complete CMS correction procedure with a particular focus on the data-driven methods applied to calorimeter jets: the main backgrounds and potential biases are discussed together with initial estimates of the systematic uncertainties. |
| Copyright/License | Preprint: (License: CC-BY-4.0) |
Journalen skapades 2011-06-15, och modifierades senast 2018-06-07
