Changes between Version 46 and Version 47 of WorkBook/PileUp
- Timestamp:
- Dec 17, 2014, 11:04:41 PM (10 years ago)
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WorkBook/PileUp
v46 v47 41 41 For calorimeter towers and jets, which are composite objects, the final time is simply the average time weighted by sqrt(E) of each individual component. 42 42 43 By default the time information is now stored in each output collection object. However, in order to account for an actual timing measurement, 44 the module !TimeSmearing should be called. This module simply smears (by a gaussian) the final time according to some resolution specificed by the user, controlled by the parameter 43 By default the time information is now stored in each output collection object. However, in order to account for an actual timing measurement, the module {{{TimeSmearing}}} should be called. This module simply smears (by a Gaussian) the final time according to some resolution specified by the user, controlled by the parameter 45 44 46 45 {{{ … … 50 49 === Pile-up contamination === 51 50 52 For estimating neutral 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].51 For estimating neutral 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]. 53 52 54 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):53 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): 55 54 56 55 {{{ … … 75 74 }}} 76 75 77 [NEW!!] 76 ==== [NEW!!!] ==== 78 77 79 78 Since !FastJet version 3.1.0, the pile-up density can be computed using a fixed grid, resulting in much faster calculation. … … 94 93 }}} 95 94 96 Both the ATLAS and CMS pile-up card are released equip ed with !FastJetGridMedianEstimator since Delphes 3.2.0.95 Both the ATLAS and CMS pile-up card are released equipped with !FastJetGridMedianEstimator since Delphes 3.2.0. 97 96 98 97 … … 104 103 105 104 {{{ZVertexResolution}}}:: 106 {{{}}}:: For |z| < ZVertexResolution the hard interaction vertex cannot be distinguished from pile-up vertices.107 {{{}}}:: For |z| > ZVertexResolution the hard interaction vertex can be distinguished from pile-up vertices.105 {{{}}}:: For |z| < ZVertexResolution the hard interaction vertex cannot be distinguished from pile-up vertices. 106 {{{}}}:: For |z| > ZVertexResolution the hard interaction vertex can be distinguished from pile-up vertices. 108 107 109 108 … … 130 129 }}} 131 130 132 * Isolation subtraction is done inside the {{{Isolation}}} module itself just by adding the line in the delphes card:131 * Isolation subtraction is done inside the {{{Isolation}}} module itself just by adding the line in the Delphes card: 133 132 134 133 {{{ … … 159 158 * MeanSqDeltaR: average distance (squared) between constituent and jet weighted by pt (squared) of constituent. 160 159 * PTD: average pt between constituent and jet weighted by pt of constituent. 161 * !FracPt(i): (sum pt of constituent within a ring 0.1*i<d r<0.1*(i+1) )/(sum pt)160 * !FracPt(i): (sum pt of constituent within a ring 0.1*i<dR<0.1*(i+1) )/(sum pt) 162 161 163 162 == Running Delphes with Pile-Up == … … 171 170 }}} 172 171 173 or, alternatively, download (and unzip) here: [http://cp3.irmp.ucl.ac.be/downloads/MinBias.pileup.gz MinBias.pileup.gz] 172 or, alternatively, download (and unzip) here: [http://cp3.irmp.ucl.ac.be/downloads/MinBias.pileup.gz MinBias.pileup.gz]. 174 173 175 174 Run Delphes on your sample X with pile-up:
