Changes between Version 17 and Version 18 of WorkBook/PileUp
- Timestamp:
- Mar 7, 2013, 12:06:14 PM (11 years ago)
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WorkBook/PileUp
v17 v18 5 5 * mixing pile-up events with the main interaction 6 6 * pile-up subtraction with the fast jet area method 7 8 An example card that uses the following is {{{examples/delphes_card_CMS_PileUp.tcl}}} 7 9 8 10 === Mixing pile-up === … … 32 34 33 35 For estimating pile-up contribution we use the well known fastjet area method, see for instance [http://arxiv.org/abs/0802.1188 arXiv:0802.1188], [http://arxiv.org/abs/0707.1378 arXiv:0707.1378]. 36 34 37 First, the user must specify whether to calculate the area while clustering the jets within the {{{FastJetFinder}}} module. Several methods for the area calculation can be specified (active area, passive area, Voronoi …) via the parameter {{{AreaAlgorithm}}}. By default this parameter is set to 0 (no area calculation): 35 38 … … 46 49 }}} 47 50 48 Note that it is common to use one jet algorithm for the rho density calculation (e.g kt with 0.6 cone) and one for the analysis (anti-kt with 0.5). In such a case, in order to be able to perform the pile subtraction (see below), one needs to compute the area also for the analysis jets. 51 Note that it is common to use one jet algorithm for the rho density calculation (e.g kt with 0.6 cone) and one for the analysis (anti-kt with 0.5). In such a case, in order to be able to perform the pile-up subtraction (see below), one needs to compute the area also for the jets relevant for the analysis. 52 49 53 50 #k_t51 54 === Pile-up subtraction === 52 55 … … 87 90 ./DelphesSTDHEP examples/delphes_card_CMS_PileUp.tcl X_PileUp.root X.hep 88 91 }}} 89
