Fork me on GitHub

source: git/modules/Calorimeter.cc@ e0f8f99

ImprovedOutputFile Timing dual_readout llp
Last change on this file since e0f8f99 was efac6f9, checked in by Michele Selvaggi <michele.selvaggi@…>, 8 years ago

added photon PID to ecal eflow towers

  • Property mode set to 100644
File size: 20.5 KB
Line 
1/*
2 * Delphes: a framework for fast simulation of a generic collider experiment
3 * Copyright (C) 2012-2014 Universite catholique de Louvain (UCL), Belgium
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19
20/** \class Calorimeter
21 *
22 * Fills calorimeter towers, performs calorimeter resolution smearing,
23 * and creates energy flow objects (tracks, photons, and neutral hadrons).
24 *
25 * \author P. Demin - UCL, Louvain-la-Neuve
26 *
27 */
28
29#include "modules/Calorimeter.h"
30
31#include "classes/DelphesClasses.h"
32#include "classes/DelphesFactory.h"
33#include "classes/DelphesFormula.h"
34
35#include "ExRootAnalysis/ExRootResult.h"
36#include "ExRootAnalysis/ExRootFilter.h"
37#include "ExRootAnalysis/ExRootClassifier.h"
38
39#include "TMath.h"
40#include "TString.h"
41#include "TFormula.h"
42#include "TRandom3.h"
43#include "TObjArray.h"
44#include "TDatabasePDG.h"
45#include "TLorentzVector.h"
46
47#include <algorithm>
48#include <stdexcept>
49#include <iostream>
50#include <sstream>
51
52using namespace std;
53
54//------------------------------------------------------------------------------
55
56Calorimeter::Calorimeter() :
57 fECalResolutionFormula(0), fHCalResolutionFormula(0),
58 fItParticleInputArray(0), fItTrackInputArray(0)
59{
60
61 fECalResolutionFormula = new DelphesFormula;
62 fHCalResolutionFormula = new DelphesFormula;
63
64 fECalTowerTrackArray = new TObjArray;
65 fItECalTowerTrackArray = fECalTowerTrackArray->MakeIterator();
66
67 fHCalTowerTrackArray = new TObjArray;
68 fItHCalTowerTrackArray = fHCalTowerTrackArray->MakeIterator();
69
70}
71
72//------------------------------------------------------------------------------
73
74Calorimeter::~Calorimeter()
75{
76
77 if(fECalResolutionFormula) delete fECalResolutionFormula;
78 if(fHCalResolutionFormula) delete fHCalResolutionFormula;
79
80 if(fECalTowerTrackArray) delete fECalTowerTrackArray;
81 if(fItECalTowerTrackArray) delete fItECalTowerTrackArray;
82
83 if(fHCalTowerTrackArray) delete fHCalTowerTrackArray;
84 if(fItHCalTowerTrackArray) delete fItHCalTowerTrackArray;
85
86}
87
88//------------------------------------------------------------------------------
89
90void Calorimeter::Init()
91{
92 ExRootConfParam param, paramEtaBins, paramPhiBins, paramFractions;
93 Long_t i, j, k, size, sizeEtaBins, sizePhiBins;
94 Double_t ecalFraction, hcalFraction;
95 TBinMap::iterator itEtaBin;
96 set< Double_t >::iterator itPhiBin;
97 vector< Double_t > *phiBins;
98
99 // read eta and phi bins
100 param = GetParam("EtaPhiBins");
101 size = param.GetSize();
102 fBinMap.clear();
103 fEtaBins.clear();
104 fPhiBins.clear();
105 for(i = 0; i < size/2; ++i)
106 {
107 paramEtaBins = param[i*2];
108 sizeEtaBins = paramEtaBins.GetSize();
109 paramPhiBins = param[i*2 + 1];
110 sizePhiBins = paramPhiBins.GetSize();
111
112 for(j = 0; j < sizeEtaBins; ++j)
113 {
114 for(k = 0; k < sizePhiBins; ++k)
115 {
116 fBinMap[paramEtaBins[j].GetDouble()].insert(paramPhiBins[k].GetDouble());
117 }
118 }
119 }
120
121 // for better performance we transform map of sets to parallel vectors:
122 // vector< double > and vector< vector< double >* >
123 for(itEtaBin = fBinMap.begin(); itEtaBin != fBinMap.end(); ++itEtaBin)
124 {
125 fEtaBins.push_back(itEtaBin->first);
126 phiBins = new vector< double >(itEtaBin->second.size());
127 fPhiBins.push_back(phiBins);
128 phiBins->clear();
129 for(itPhiBin = itEtaBin->second.begin(); itPhiBin != itEtaBin->second.end(); ++itPhiBin)
130 {
131 phiBins->push_back(*itPhiBin);
132 }
133 }
134
135 // read energy fractions for different particles
136 param = GetParam("EnergyFraction");
137 size = param.GetSize();
138
139 // set default energy fractions values
140 fFractionMap.clear();
141 fFractionMap[0] = make_pair(0.0, 1.0);
142
143 for(i = 0; i < size/2; ++i)
144 {
145 paramFractions = param[i*2 + 1];
146
147 ecalFraction = paramFractions[0].GetDouble();
148 hcalFraction = paramFractions[1].GetDouble();
149
150 fFractionMap[param[i*2].GetInt()] = make_pair(ecalFraction, hcalFraction);
151 }
152
153 // read min E value for timing measurement in ECAL
154 fTimingEnergyMin = GetDouble("TimingEnergyMin",4.);
155 // For timing
156 // So far this flag needs to be false
157 // Curved extrapolation not supported
158 fElectronsFromTrack = false;
159
160 // read min E value for towers to be saved
161 fECalEnergyMin = GetDouble("ECalEnergyMin", 0.0);
162 fHCalEnergyMin = GetDouble("HCalEnergyMin", 0.0);
163
164 fECalEnergySignificanceMin = GetDouble("ECalEnergySignificanceMin", 0.0);
165 fHCalEnergySignificanceMin = GetDouble("HCalEnergySignificanceMin", 0.0);
166
167 // switch on or off the dithering of the center of calorimeter towers
168 fSmearTowerCenter = GetBool("SmearTowerCenter", true);
169
170 // read resolution formulas
171 fECalResolutionFormula->Compile(GetString("ECalResolutionFormula", "0"));
172 fHCalResolutionFormula->Compile(GetString("HCalResolutionFormula", "0"));
173
174 // import array with output from other modules
175 fParticleInputArray = ImportArray(GetString("ParticleInputArray", "ParticlePropagator/particles"));
176 fItParticleInputArray = fParticleInputArray->MakeIterator();
177
178 fTrackInputArray = ImportArray(GetString("TrackInputArray", "ParticlePropagator/tracks"));
179 fItTrackInputArray = fTrackInputArray->MakeIterator();
180
181 // create output arrays
182 fTowerOutputArray = ExportArray(GetString("TowerOutputArray", "towers"));
183 fPhotonOutputArray = ExportArray(GetString("PhotonOutputArray", "photons"));
184
185 fEFlowTrackOutputArray = ExportArray(GetString("EFlowTrackOutputArray", "eflowTracks"));
186 fEFlowPhotonOutputArray = ExportArray(GetString("EFlowPhotonOutputArray", "eflowPhotons"));
187 fEFlowNeutralHadronOutputArray = ExportArray(GetString("EFlowNeutralHadronOutputArray", "eflowNeutralHadrons"));
188}
189
190//------------------------------------------------------------------------------
191
192void Calorimeter::Finish()
193{
194 vector< vector< Double_t >* >::iterator itPhiBin;
195 if(fItParticleInputArray) delete fItParticleInputArray;
196 if(fItTrackInputArray) delete fItTrackInputArray;
197 for(itPhiBin = fPhiBins.begin(); itPhiBin != fPhiBins.end(); ++itPhiBin)
198 {
199 delete *itPhiBin;
200 }
201}
202
203//------------------------------------------------------------------------------
204
205void Calorimeter::Process()
206{
207 Candidate *particle, *track;
208 TLorentzVector position, momentum;
209 Short_t etaBin, phiBin, flags;
210 Int_t number;
211 Long64_t towerHit, towerEtaPhi, hitEtaPhi;
212 Double_t ecalFraction, hcalFraction;
213 Double_t ecalEnergy, hcalEnergy;
214 Int_t pdgCode;
215
216 TFractionMap::iterator itFractionMap;
217
218 vector< Double_t >::iterator itEtaBin;
219 vector< Double_t >::iterator itPhiBin;
220 vector< Double_t > *phiBins;
221
222 vector< Long64_t >::iterator itTowerHits;
223
224 DelphesFactory *factory = GetFactory();
225 fTowerHits.clear();
226 fECalTowerFractions.clear();
227 fHCalTowerFractions.clear();
228 fECalTrackFractions.clear();
229 fHCalTrackFractions.clear();
230
231 // loop over all particles
232 fItParticleInputArray->Reset();
233 number = -1;
234 while((particle = static_cast<Candidate*>(fItParticleInputArray->Next())))
235 {
236 const TLorentzVector &particlePosition = particle->Position;
237 ++number;
238
239 pdgCode = TMath::Abs(particle->PID);
240
241 itFractionMap = fFractionMap.find(pdgCode);
242 if(itFractionMap == fFractionMap.end())
243 {
244 itFractionMap = fFractionMap.find(0);
245 }
246
247 ecalFraction = itFractionMap->second.first;
248 hcalFraction = itFractionMap->second.second;
249
250 fECalTowerFractions.push_back(ecalFraction);
251 fHCalTowerFractions.push_back(hcalFraction);
252
253 if(ecalFraction < 1.0E-9 && hcalFraction < 1.0E-9) continue;
254
255 // find eta bin [1, fEtaBins.size - 1]
256 itEtaBin = lower_bound(fEtaBins.begin(), fEtaBins.end(), particlePosition.Eta());
257 if(itEtaBin == fEtaBins.begin() || itEtaBin == fEtaBins.end()) continue;
258 etaBin = distance(fEtaBins.begin(), itEtaBin);
259
260 // phi bins for given eta bin
261 phiBins = fPhiBins[etaBin];
262
263 // find phi bin [1, phiBins.size - 1]
264 itPhiBin = lower_bound(phiBins->begin(), phiBins->end(), particlePosition.Phi());
265 if(itPhiBin == phiBins->begin() || itPhiBin == phiBins->end()) continue;
266 phiBin = distance(phiBins->begin(), itPhiBin);
267
268 flags = 0;
269 flags |= (pdgCode == 11 || pdgCode == 22) << 1;
270
271 // make tower hit {16-bits for eta bin number, 16-bits for phi bin number, 8-bits for flags, 24-bits for particle number}
272 towerHit = (Long64_t(etaBin) << 48) | (Long64_t(phiBin) << 32) | (Long64_t(flags) << 24) | Long64_t(number);
273
274 fTowerHits.push_back(towerHit);
275 }
276
277 // loop over all tracks
278 fItTrackInputArray->Reset();
279 number = -1;
280 while((track = static_cast<Candidate*>(fItTrackInputArray->Next())))
281 {
282 const TLorentzVector &trackPosition = track->Position;
283 ++number;
284
285 pdgCode = TMath::Abs(track->PID);
286
287 itFractionMap = fFractionMap.find(pdgCode);
288 if(itFractionMap == fFractionMap.end())
289 {
290 itFractionMap = fFractionMap.find(0);
291 }
292
293 ecalFraction = itFractionMap->second.first;
294 hcalFraction = itFractionMap->second.second;
295
296 fECalTrackFractions.push_back(ecalFraction);
297 fHCalTrackFractions.push_back(hcalFraction);
298
299 // find eta bin [1, fEtaBins.size - 1]
300 itEtaBin = lower_bound(fEtaBins.begin(), fEtaBins.end(), trackPosition.Eta());
301 if(itEtaBin == fEtaBins.begin() || itEtaBin == fEtaBins.end()) continue;
302 etaBin = distance(fEtaBins.begin(), itEtaBin);
303
304 // phi bins for given eta bin
305 phiBins = fPhiBins[etaBin];
306
307 // find phi bin [1, phiBins.size - 1]
308 itPhiBin = lower_bound(phiBins->begin(), phiBins->end(), trackPosition.Phi());
309 if(itPhiBin == phiBins->begin() || itPhiBin == phiBins->end()) continue;
310 phiBin = distance(phiBins->begin(), itPhiBin);
311
312 flags = 1;
313
314 // make tower hit {16-bits for eta bin number, 16-bits for phi bin number, 8-bits for flags, 24-bits for track number}
315 towerHit = (Long64_t(etaBin) << 48) | (Long64_t(phiBin) << 32) | (Long64_t(flags) << 24) | Long64_t(number);
316
317 fTowerHits.push_back(towerHit);
318 }
319
320 // all hits are sorted first by eta bin number, then by phi bin number,
321 // then by flags and then by particle or track number
322 sort(fTowerHits.begin(), fTowerHits.end());
323
324 // loop over all hits
325 towerEtaPhi = 0;
326 fTower = 0;
327 for(itTowerHits = fTowerHits.begin(); itTowerHits != fTowerHits.end(); ++itTowerHits)
328 {
329 towerHit = (*itTowerHits);
330 flags = (towerHit >> 24) & 0x00000000000000FFLL;
331 number = (towerHit) & 0x0000000000FFFFFFLL;
332 hitEtaPhi = towerHit >> 32;
333
334 if(towerEtaPhi != hitEtaPhi)
335 {
336 // switch to next tower
337 towerEtaPhi = hitEtaPhi;
338
339 // finalize previous tower
340 FinalizeTower();
341
342 // create new tower
343 fTower = factory->NewCandidate();
344
345 phiBin = (towerHit >> 32) & 0x000000000000FFFFLL;
346 etaBin = (towerHit >> 48) & 0x000000000000FFFFLL;
347
348 // phi bins for given eta bin
349 phiBins = fPhiBins[etaBin];
350
351 // calculate eta and phi of the tower's center
352 fTowerEta = 0.5*(fEtaBins[etaBin - 1] + fEtaBins[etaBin]);
353 fTowerPhi = 0.5*((*phiBins)[phiBin - 1] + (*phiBins)[phiBin]);
354
355 fTowerEdges[0] = fEtaBins[etaBin - 1];
356 fTowerEdges[1] = fEtaBins[etaBin];
357 fTowerEdges[2] = (*phiBins)[phiBin - 1];
358 fTowerEdges[3] = (*phiBins)[phiBin];
359
360 fECalTowerEnergy = 0.0;
361 fHCalTowerEnergy = 0.0;
362
363 fECalTrackEnergy = 0.0;
364 fHCalTrackEnergy = 0.0;
365
366 fECalTrackSigma = 0.0;
367 fHCalTrackSigma = 0.0;
368
369 fTowerTrackHits = 0;
370 fTowerPhotonHits = 0;
371
372 fECalTowerTrackArray->Clear();
373 fHCalTowerTrackArray->Clear();
374
375 }
376
377 // check for track hits
378 if(flags & 1)
379 {
380 ++fTowerTrackHits;
381
382 track = static_cast<Candidate*>(fTrackInputArray->At(number));
383 momentum = track->Momentum;
384 position = track->Position;
385
386 ecalEnergy = momentum.E() * fECalTrackFractions[number];
387 hcalEnergy = momentum.E() * fHCalTrackFractions[number];
388
389 if(ecalEnergy > fTimingEnergyMin && fTower)
390 {
391 if(fElectronsFromTrack)
392 {
393 fTower->ECalEnergyTimePairs.push_back(make_pair<Float_t, Float_t>(ecalEnergy, track->Position.T()));
394 }
395 }
396
397 if(fECalTrackFractions[number] > 1.0E-9 && fHCalTrackFractions[number] < 1.0E-9)
398 {
399 fECalTrackEnergy += ecalEnergy;
400 fECalTrackSigma += (track->TrackResolution)*momentum.E()*(track->TrackResolution)*momentum.E();
401 fECalTowerTrackArray->Add(track);
402 }
403
404 else if(fECalTrackFractions[number] < 1.0E-9 && fHCalTrackFractions[number] > 1.0E-9)
405 {
406 fHCalTrackEnergy += hcalEnergy;
407 fHCalTrackSigma += (track->TrackResolution)*momentum.E()*(track->TrackResolution)*momentum.E();
408 fHCalTowerTrackArray->Add(track);
409 }
410
411 else if(fECalTrackFractions[number] < 1.0E-9 && fHCalTrackFractions[number] < 1.0E-9)
412 {
413 fEFlowTrackOutputArray->Add(track);
414 }
415
416 continue;
417 }
418
419 // check for photon and electron hits in current tower
420 if(flags & 2) ++fTowerPhotonHits;
421
422 particle = static_cast<Candidate*>(fParticleInputArray->At(number));
423 momentum = particle->Momentum;
424 position = particle->Position;
425
426 // fill current tower
427 ecalEnergy = momentum.E() * fECalTowerFractions[number];
428 hcalEnergy = momentum.E() * fHCalTowerFractions[number];
429
430 fECalTowerEnergy += ecalEnergy;
431 fHCalTowerEnergy += hcalEnergy;
432
433 if(ecalEnergy > fTimingEnergyMin && fTower)
434 {
435 if (abs(particle->PID) != 11 || !fElectronsFromTrack)
436 {
437 fTower->ECalEnergyTimePairs.push_back(make_pair<Float_t, Float_t>(ecalEnergy, particle->Position.T()));
438 }
439 }
440
441 fTower->AddCandidate(particle);
442 }
443
444 // finalize last tower
445 FinalizeTower();
446}
447
448//------------------------------------------------------------------------------
449
450void Calorimeter::FinalizeTower()
451{
452 Candidate *track, *tower, *mother;
453 Double_t energy, pt, eta, phi;
454 Double_t ecalEnergy, hcalEnergy;
455 Double_t ecalNeutralEnergy, hcalNeutralEnergy;
456
457 Double_t ecalSigma, hcalSigma;
458 Double_t ecalNeutralSigma, hcalNeutralSigma;
459
460 Double_t weightTrack, weightCalo, bestEnergyEstimate, rescaleFactor;
461
462 TLorentzVector momentum;
463 TFractionMap::iterator itFractionMap;
464
465 Float_t weight, sumWeightedTime, sumWeight;
466
467 if(!fTower) return;
468
469 ecalSigma = fECalResolutionFormula->Eval(0.0, fTowerEta, 0.0, fECalTowerEnergy);
470 hcalSigma = fHCalResolutionFormula->Eval(0.0, fTowerEta, 0.0, fHCalTowerEnergy);
471
472 ecalEnergy = LogNormal(fECalTowerEnergy, ecalSigma);
473 hcalEnergy = LogNormal(fHCalTowerEnergy, hcalSigma);
474
475 ecalSigma = fECalResolutionFormula->Eval(0.0, fTowerEta, 0.0, ecalEnergy);
476 hcalSigma = fHCalResolutionFormula->Eval(0.0, fTowerEta, 0.0, hcalEnergy);
477
478 if(ecalEnergy < fECalEnergyMin || ecalEnergy < fECalEnergySignificanceMin*ecalSigma) ecalEnergy = 0.0;
479 if(hcalEnergy < fHCalEnergyMin || hcalEnergy < fHCalEnergySignificanceMin*hcalSigma) hcalEnergy = 0.0;
480
481 energy = ecalEnergy + hcalEnergy;
482
483 if(fSmearTowerCenter)
484 {
485 eta = gRandom->Uniform(fTowerEdges[0], fTowerEdges[1]);
486 phi = gRandom->Uniform(fTowerEdges[2], fTowerEdges[3]);
487 }
488 else
489 {
490 eta = fTowerEta;
491 phi = fTowerPhi;
492 }
493
494 pt = energy / TMath::CosH(eta);
495
496 // Time calculation for tower
497 fTower->NTimeHits = 0;
498 sumWeightedTime = 0.0;
499 sumWeight = 0.0;
500
501 for(size_t i = 0; i < fTower->ECalEnergyTimePairs.size(); ++i)
502 {
503 weight = TMath::Sqrt(fTower->ECalEnergyTimePairs[i].first);
504 sumWeightedTime += weight * fTower->ECalEnergyTimePairs[i].second;
505 sumWeight += weight;
506 fTower->NTimeHits++;
507 }
508
509 if(sumWeight > 0.0)
510 {
511 fTower->Position.SetPtEtaPhiE(1.0, eta, phi, sumWeightedTime/sumWeight);
512 }
513 else
514 {
515 fTower->Position.SetPtEtaPhiE(1.0, eta, phi, 999999.9);
516 }
517
518
519 fTower->Momentum.SetPtEtaPhiE(pt, eta, phi, energy);
520 fTower->Eem = ecalEnergy;
521 fTower->Ehad = hcalEnergy;
522
523 fTower->Edges[0] = fTowerEdges[0];
524 fTower->Edges[1] = fTowerEdges[1];
525 fTower->Edges[2] = fTowerEdges[2];
526 fTower->Edges[3] = fTowerEdges[3];
527
528 if(energy > 0.0)
529 {
530 if(fTowerPhotonHits > 0 && fTowerTrackHits == 0)
531 {
532 fPhotonOutputArray->Add(fTower);
533 }
534
535 fTowerOutputArray->Add(fTower);
536 }
537
538 // fill energy flow candidates
539 fECalTrackSigma = TMath::Sqrt(fECalTrackSigma);
540 fHCalTrackSigma = TMath::Sqrt(fHCalTrackSigma);
541
542 //compute neutral excesses
543 ecalNeutralEnergy = max( (ecalEnergy - fECalTrackEnergy) , 0.0);
544 hcalNeutralEnergy = max( (hcalEnergy - fHCalTrackEnergy) , 0.0);
545
546 ecalNeutralSigma = ecalNeutralEnergy / TMath::Sqrt(fECalTrackSigma*fECalTrackSigma + ecalSigma*ecalSigma);
547 hcalNeutralSigma = hcalNeutralEnergy / TMath::Sqrt(fHCalTrackSigma*fHCalTrackSigma + hcalSigma*hcalSigma);
548
549 // if ecal neutral excess is significant, simply create neutral EflowPhoton tower and clone each track into eflowtrack
550 if(ecalNeutralEnergy > fECalEnergyMin && ecalNeutralSigma > fECalEnergySignificanceMin)
551 {
552 // create new photon tower
553 tower = static_cast<Candidate*>(fTower->Clone());
554 pt = ecalNeutralEnergy / TMath::CosH(eta);
555
556 tower->Momentum.SetPtEtaPhiE(pt, eta, phi, ecalNeutralEnergy);
557 tower->Eem = ecalNeutralEnergy;
558 tower->Ehad = 0.0;
559 tower->PID = 22;
560
561 fEFlowPhotonOutputArray->Add(tower);
562
563 //clone tracks
564 fItECalTowerTrackArray->Reset();
565 while((track = static_cast<Candidate*>(fItECalTowerTrackArray->Next())))
566 {
567 mother = track;
568 track = static_cast<Candidate*>(track->Clone());
569 track->AddCandidate(mother);
570
571 fEFlowTrackOutputArray->Add(track);
572 }
573
574 }
575
576 // if neutral excess is not significant, rescale eflow tracks, such that the total charged equals the best measurement given by the calorimeter and tracking
577 else if(fECalTrackEnergy > 0.0)
578 {
579 weightTrack = (fECalTrackSigma > 0.0) ? 1 / (fECalTrackSigma*fECalTrackSigma) : 0.0;
580 weightCalo = (ecalSigma > 0.0) ? 1 / (ecalSigma*ecalSigma) : 0.0;
581
582 bestEnergyEstimate = (weightTrack*fECalTrackEnergy + weightCalo*ecalEnergy) / (weightTrack + weightCalo);
583 rescaleFactor = bestEnergyEstimate/fECalTrackEnergy;
584
585 //rescale tracks
586 fItECalTowerTrackArray->Reset();
587 while((track = static_cast<Candidate*>(fItECalTowerTrackArray->Next())))
588 {
589 mother = track;
590 track = static_cast<Candidate*>(track->Clone());
591 track->AddCandidate(mother);
592
593 track->Momentum *= rescaleFactor;
594
595 fEFlowTrackOutputArray->Add(track);
596 }
597 }
598
599
600 // if hcal neutral excess is significant, simply create neutral EflowNeutralHadron tower and clone each track into eflowtrack
601 if(hcalNeutralEnergy > fHCalEnergyMin && hcalNeutralSigma > fHCalEnergySignificanceMin)
602 {
603 // create new photon tower
604 tower = static_cast<Candidate*>(fTower->Clone());
605 pt = hcalNeutralEnergy / TMath::CosH(eta);
606
607 tower->Momentum.SetPtEtaPhiE(pt, eta, phi, hcalNeutralEnergy);
608 tower->Ehad = hcalNeutralEnergy;
609 tower->Eem = 0.0;
610
611 fEFlowNeutralHadronOutputArray->Add(tower);
612
613 //clone tracks
614 fItHCalTowerTrackArray->Reset();
615 while((track = static_cast<Candidate*>(fItHCalTowerTrackArray->Next())))
616 {
617 mother = track;
618 track = static_cast<Candidate*>(track->Clone());
619 track->AddCandidate(mother);
620
621 fEFlowTrackOutputArray->Add(track);
622 }
623
624 }
625
626 // if neutral excess is not significant, rescale eflow tracks, such that the total charged equals the best measurement given by the calorimeter and tracking
627 else if(fHCalTrackEnergy > 0.0)
628 {
629 weightTrack = (fHCalTrackSigma > 0.0) ? 1 / (fHCalTrackSigma*fHCalTrackSigma) : 0.0;
630 weightCalo = (hcalSigma > 0.0) ? 1 / (hcalSigma*hcalSigma) : 0.0;
631
632 bestEnergyEstimate = (weightTrack*fHCalTrackEnergy + weightCalo*hcalEnergy) / (weightTrack + weightCalo);
633 rescaleFactor = bestEnergyEstimate / fHCalTrackEnergy;
634
635 //rescale tracks
636 fItECalTowerTrackArray->Reset();
637 while((track = static_cast<Candidate*>(fItECalTowerTrackArray->Next())))
638 {
639 mother = track;
640 track = static_cast<Candidate*>(track->Clone());
641 track->AddCandidate(mother);
642
643 track->Momentum *= rescaleFactor;
644
645 fEFlowTrackOutputArray->Add(track);
646 }
647 }
648
649
650}
651
652//------------------------------------------------------------------------------
653
654Double_t Calorimeter::LogNormal(Double_t mean, Double_t sigma)
655{
656 Double_t a, b;
657
658 if(mean > 0.0)
659 {
660 b = TMath::Sqrt(TMath::Log((1.0 + (sigma*sigma)/(mean*mean))));
661 a = TMath::Log(mean) - 0.5*b*b;
662
663 return TMath::Exp(a + b*gRandom->Gaus(0.0, 1.0));
664 }
665 else
666 {
667 return 0.0;
668 }
669}
Note: See TracBrowser for help on using the repository browser.