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Comparing UserCode/MitPhysics/Utils/src/JetTools.cc (file contents):
Revision 1.3 by ceballos, Fri Jul 30 20:23:31 2010 UTC vs.
Revision 1.23 by ceballos, Thu Apr 26 10:16:24 2012 UTC

# Line 1 | Line 1
1   #include "MitPhysics/Utils/interface/JetTools.h"
2 + #include <algorithm>
3 + #include <vector>
4  
5   ClassImp(mithep::JetTools)
6  
7   using namespace mithep;
8 +
9  
10   JetTools::JetTools()
11   {
# Line 15 | Line 18 | JetTools::~JetTools()
18   }
19  
20   //Remember to remove the signal from particles before inputting into the function
21 < Double_t JetTools::NJettiness(const ParticleOArr *particles, const JetOArr *jets, bool UseQ, Double_t Y){
21 > Double_t JetTools::NJettiness(const ParticleOArr *particles, const JetOArr *jets, double Q, double Y){
22    if(particles->GetEntries() <= 0) return 0.0;
23  
24    Double_t fval = 0.0;
# Line 27 | Line 30 | Double_t JetTools::NJettiness(const Part
30      for(int j=0;j<int(jets->GetEntries());j++){
31        fvalpart = TMath::Min(fvalpart,(jets->At(j)->Pt()) *
32                   (2 * TMath::CosH(TMath::Abs(jets->At(j)->Eta()-particles->At(i)->Eta()))
33 <                - 2 * TMath::Cos(MathUtils::DeltaPhi(jets->At(j)->Phi(),particles->At(i)->Phi()))));
33 >                  - 2 * TMath::Cos(fabs(MathUtils::DeltaPhi(jets->At(j)->Phi(),particles->At(i)->Phi())))));
34 >    }
35 >    fval = fval + fvalpart;
36 >  }
37 >
38 >  fval = fval / Q;
39 >
40 >  return fval;
41 > }
42 >
43 > Double_t JetTools::NJettiness(const PFCandidateOArr *pfCandidates, const JetOArr *jets, double Q, double Y){
44 >  if(pfCandidates->GetEntries() <= 0) return 0.0;
45 >
46 >  Double_t fval = 0.0;
47 >  Double_t fvalpart;
48 >
49 >  for(int i=0;i<int(pfCandidates->GetEntries());i++){
50 >    fvalpart = (pfCandidates->At(i)->Pt()) * TMath::Exp(-TMath::Abs(pfCandidates->At(i)->Eta()-Y));
51 >
52 >    for(int j=0;j<int(jets->GetEntries());j++){
53 >      fvalpart = TMath::Min(fvalpart,(jets->At(j)->Pt()) *
54 >                 (2 * TMath::CosH(TMath::Abs(jets->At(j)->Eta()-pfCandidates->At(i)->Eta()))
55 >                  - 2 * TMath::Cos(fabs(MathUtils::DeltaPhi(jets->At(j)->Phi(),pfCandidates->At(i)->Phi())))));
56      }
57      fval = fval + fvalpart;
58    }
59  
60 <  if(UseQ == kTRUE) fval = fval / particles->At(0)->Pt();
60 >  fval = fval / Q;
61  
62    return fval;
63   }
64  
65 < Double_t JetTools::NJettiness(const TrackOArr *tracks, const JetOArr *jets, bool UseQ, Double_t Y){
65 > Double_t JetTools::NJettiness(const TrackOArr *tracks, const JetOArr *jets, double Q, double Y){
66    if(tracks->GetEntries() <= 0) return 0.0;
67  
68    Double_t fval = 0.0;
# Line 49 | Line 74 | Double_t JetTools::NJettiness(const Trac
74      for(int j=0;j<int(jets->GetEntries());j++){
75        fvalpart = TMath::Min(fvalpart,(jets->At(j)->Pt()) *
76                   (2 * TMath::CosH(TMath::Abs(jets->At(j)->Eta()-tracks->At(i)->Eta()))
77 <                - 2 * TMath::Cos(MathUtils::DeltaPhi(jets->At(j)->Phi(),tracks->At(i)->Phi()))));
77 >                  - 2 * TMath::Cos(fabs(MathUtils::DeltaPhi(jets->At(j)->Phi(),tracks->At(i)->Phi())))));
78      }
79      fval = fval + fvalpart;
80    }
81  
82 <  if(UseQ == kTRUE) fval = fval / tracks->At(0)->Pt();
82 >  fval = fval / Q;
83    
84    return fval;
85   }
86  
87 < Double_t JetTools::NJettiness(const JetOArr *jetsS, const JetOArr *jets, bool UseQ, Double_t Y){
87 > Double_t JetTools::NJettiness(const JetOArr *jetsS, const JetOArr *jets, double Q, double Y){
88    if(jetsS->GetEntries() <= 0) return 0.0;
89  
90    Double_t fval = 0.0;
# Line 71 | Line 96 | Double_t JetTools::NJettiness(const JetO
96      for(int j=0;j<int(jets->GetEntries());j++){
97        fvalpart = TMath::Min(fvalpart,(jets->At(j)->Pt()) *
98                   (2 * TMath::CosH(TMath::Abs(jets->At(j)->Eta()-jetsS->At(i)->Eta()))
99 <                - 2 * TMath::Cos(MathUtils::DeltaPhi(jets->At(j)->Phi(),jetsS->At(i)->Phi()))));
99 >                  - 2 * TMath::Cos(fabs(MathUtils::DeltaPhi(jets->At(j)->Phi(),jetsS->At(i)->Phi())))));
100      }
101      fval = fval + fvalpart;
102    }
103  
104 <  if(UseQ == kTRUE) fval = fval / jetsS->At(0)->Pt();
104 >  fval = fval / Q;
105    
106    return fval;
107   }
108  
109 < Double_t JetTools::NJettiness(const CaloTowerOArr *calos, const JetOArr *jets, bool UseQ, Double_t Y){
109 > Double_t JetTools::NJettiness(const CaloTowerOArr *calos, const JetOArr *jets, double Q, double Y){
110    if(calos->GetEntries() <= 0) return 0.0;
111  
112    Double_t fval = 0.0;
# Line 93 | Line 118 | Double_t JetTools::NJettiness(const Calo
118      for(int j=0;j<int(jets->GetEntries());j++){
119        fvalpart = TMath::Min(fvalpart,(jets->At(j)->Pt()) *
120                   (2 * TMath::CosH(TMath::Abs(jets->At(j)->Eta()-calos->At(i)->Eta()))
121 <                - 2 * TMath::Cos(MathUtils::DeltaPhi(jets->At(j)->Phi(),calos->At(i)->Phi()))));
121 >                  - 2 * TMath::Cos(fabs(MathUtils::DeltaPhi(jets->At(j)->Phi(),calos->At(i)->Phi())))));
122      }
123      fval = fval + fvalpart;
124    }
125  
126 <  if(UseQ == kTRUE) fval = fval / calos->At(0)->Pt();
126 >  fval = fval / Q;
127    
128    return fval;
129   }
# Line 184 | Line 209 | Double_t JetTools::CosineOmega(const Par
209  
210   //Transverse Higgs mass
211   Double_t JetTools::MtHiggs(const ParticleOArr * leptons,
212 <                           const Met *met, int nsel){
212 >                           const Met *met, double metFraction[2], int nsel){
213    if(leptons->Entries() < 2) return -999.0;
214  
215    double mtHiggs = -999.0;
# Line 230 | Line 255 | Double_t JetTools::MtHiggs(const Particl
255      mll   = dilepton->Mass();
256      mnu   = 0.0;
257    }
258 <  else if(nsel == 4){ // Use the formula from hep-ph:1006.4998
258 >  else if(nsel == 4){ // Use of Mt mass and replacing mnu using the met optimal
259 >    enell = TMath::Sqrt(dilepton->Pt()*dilepton->Pt() + dilepton->Mt()*dilepton->Mt());
260 >    enenn = TMath::Sqrt(met->Pt() *met->Pt()  + 0.0*0.0);
261 >    enex  = dilepton->Px() + met->Px();
262 >    eney  = dilepton->Py() + met->Py();
263 >    mll   = dilepton->Mass();
264 >    double metAuxPx[2] = {met->Px() * metFraction[0],
265 >                          met->Px() * (1.0 - metFraction[0])};
266 >    double metAuxPy[2] = {met->Py() * metFraction[1],
267 >                          met->Py() * (1.0 - metFraction[1])};
268 >    double ene = TMath::Sqrt(metAuxPx[0]*metAuxPx[0]+metAuxPy[0]*metAuxPy[0]) +
269 >                 TMath::Sqrt(metAuxPx[1]*metAuxPx[1]+metAuxPy[1]*metAuxPy[1]);
270 >    double px = metAuxPx[0] + metAuxPx[1];
271 >    double py = metAuxPy[0] + metAuxPy[1];
272 >    mnu = TMath::Sqrt(ene*ene - px*px - py*py);
273 >  }
274 >  else if(nsel == 5){ // Using the optimal met value
275 >    double metAuxPx[2] = {met->Px() * metFraction[0],
276 >                          met->Px() * (1.0 - metFraction[0])};
277 >    double metAuxPy[2] = {met->Py() * metFraction[1],
278 >                          met->Py() * (1.0 - metFraction[1])};
279 >    double ene = leptons->At(0)->Pt() + leptons->At(1)->Pt() +
280 >                 TMath::Sqrt(metAuxPx[0]*metAuxPx[0]+metAuxPy[0]*metAuxPy[0]) +
281 >                 TMath::Sqrt(metAuxPx[1]*metAuxPx[1]+metAuxPy[1]*metAuxPy[1]);
282 >    double px = leptons->At(0)->Px() + leptons->At(1)->Px() +
283 >                metAuxPx[0] + metAuxPx[1];
284 >    double py = leptons->At(0)->Py() + leptons->At(1)->Py() +
285 >                metAuxPy[0] + metAuxPy[1];
286 >    mtHiggs = ene*ene - px*px - py*py;
287 >  }
288 >  else if(nsel == 6){ // Use the formula from hep-ph:1006.4998
289      mtHiggs = 2*leptons->At(0)->Pt()*leptons->At(0)->Pt() + 2*leptons->At(1)->Pt()*leptons->At(1)->Pt() + 3 * (
290        leptons->At(0)->Pt()*leptons->At(1)->Pt() + met->Pt()*(leptons->At(0)->Pt()+leptons->At(1)->Pt())
291        - met->Px()*dilepton->Px() - met->Py()*dilepton->Py()
292        - leptons->At(0)->Px()*leptons->At(1)->Px() - leptons->At(0)->Py()*leptons->At(1)->Py());
293    }
294 +  else if(nsel == 7){ // Use of M mass and mnu == 0
295 +    double deltaPhiDileptonMet = fabs(MathUtils::DeltaPhi(dilepton->Phi(),
296 +                                                          met->Phi()));
297 +    mtHiggs = 2.0*dilepton->Pt()*met->Pt()*(1.0 - cos(deltaPhiDileptonMet));
298 +  }
299  
300 <  if(nsel >= 0 && nsel <= 3){
300 >  if(nsel >= 0 && nsel <= 4){
301      mtHiggs = mll*mll + mnu*mnu + 2.0*(enell*enenn - enex*enex - eney*eney);
302    }
303 +
304    if(mtHiggs <= 0) mtHiggs = 0.0;
305    else             mtHiggs = TMath::Sqrt(mtHiggs);
306  
# Line 247 | Line 308 | Double_t JetTools::MtHiggs(const Particl
308  
309    return mtHiggs;
310   }
311 +
312 + Double_t JetTools::Beta(const TrackCol *tracks, Jet *jet, const Vertex *vertex, Double_t  delta_z, Double_t delta_cone){  
313 +
314 +  if(tracks->GetEntries() <= 0) return 1.0;
315 +
316 +  double Pt_jets_X = 0. ;
317 +  double Pt_jets_Y = 0. ;
318 +  double Pt_jets_X_tot = 0. ;
319 +  double Pt_jets_Y_tot = 0. ;
320 +
321 +  for(int i=0;i<int(tracks->GetEntries());i++){
322 +    if(MathUtils::DeltaR(tracks->At(i)->Mom(),jet->Mom()) < delta_cone){
323 +      Pt_jets_X_tot += tracks->At(i)->Px();
324 +      Pt_jets_Y_tot += tracks->At(i)->Py();  
325 +      double pDz = TMath::Abs(tracks->At(i)->DzCorrected(*vertex));
326 +      if(pDz < delta_z){
327 +        Pt_jets_X += tracks->At(i)->Px();
328 +        Pt_jets_Y += tracks->At(i)->Py();  
329 +      }
330 +    }
331 +  }
332 +
333 +  if(sqrt(Pt_jets_X_tot*Pt_jets_X_tot + Pt_jets_Y_tot*Pt_jets_Y_tot) > 0)
334 +    return sqrt(Pt_jets_X*Pt_jets_X + Pt_jets_Y*Pt_jets_Y) / sqrt(Pt_jets_X_tot*Pt_jets_X_tot + Pt_jets_Y_tot*Pt_jets_Y_tot);
335 +
336 +  return 1.0;
337 + }
338 +
339 +
340 + Double_t JetTools::Beta(const PFJet *jet, const Vertex *vertex, Double_t  delta_z){  
341 +  double Pt_jets= 0. ;
342 +  double Pt_jetsTot = 0. ;
343 +  
344 +  for(UInt_t i=0;i<jet->NPFCands();i++){
345 +    if(jet->PFCand(i)->TrackerTrk()){
346 +      Pt_jetsTot += jet->PFCand(i)->TrackerTrk()->Pt();
347 +      double pDz = TMath::Abs(jet->PFCand(i)->TrackerTrk()->DzCorrected(*vertex));
348 +      if(pDz < delta_z){
349 +        Pt_jets += jet->PFCand(i)->TrackerTrk()->Pt();
350 +      }
351 +    }
352 +  }
353 +
354 +  Double_t beta = 0.;
355 +  if (Pt_jetsTot > 0)
356 +    beta = Pt_jets/Pt_jetsTot;
357 +
358 +  return beta;
359 + }
360 +
361 + Double_t JetTools::Beta2(const PFJet *jet, const Vertex *vertex, Double_t  delta_z){  
362 +  double Pt_jets= 0. ;
363 +  double Pt_jetsTot = 0. ;
364 +
365 +  for(UInt_t i=0;i<jet->NPFCands();i++){
366 +    if(jet->PFCand(i)->BestTrk()){
367 +      Pt_jetsTot += jet->PFCand(i)->BestTrk()->Pt()*jet->PFCand(i)->BestTrk()->Pt();
368 +      double pDz = TMath::Abs(jet->PFCand(i)->BestTrk()->DzCorrected(*vertex));
369 +      if(pDz < delta_z){
370 +        Pt_jets += jet->PFCand(i)->BestTrk()->Pt()*jet->PFCand(i)->BestTrk()->Pt();
371 +      }
372 +    }
373 +  }
374 +
375 +  Double_t beta = 1.0;
376 +  if (Pt_jetsTot > 0)
377 +    beta = Pt_jets/Pt_jetsTot;
378 +  return beta;
379 + }
380 +
381 +
382 + Bool_t  JetTools::PassBetaVertexAssociationCut(const PFJet *jet, const Vertex *referenceVertex, const VertexCol *vertices, Double_t delta_z) {
383 +
384 +  Bool_t passBetaCut = kTRUE;
385 +  if(vertices->GetEntries() > 0) {
386 +    Double_t Beta = JetTools::Beta(jet, referenceVertex, 0.2);
387 +    Double_t Beta_other = 0.0;
388 +    for(UInt_t nv=0; nv<vertices->GetEntries(); nv++){
389 +      if (referenceVertex == vertices->At(nv)) continue;
390 +      Double_t BetaAux = JetTools::Beta(jet, vertices->At(nv), 0.2);
391 +      if(BetaAux > Beta_other) Beta_other = BetaAux;
392 +    }
393 +    if(Beta_other > Beta) passBetaCut = kFALSE;
394 +  }
395 +
396 +  return passBetaCut;
397 +
398 + }
399 +
400 + Bool_t  JetTools::PassBeta2VertexAssociationCut(const PFJet *jet, const Vertex *referenceVertex, const VertexCol *vertices, Double_t delta_z) {
401 +
402 +  Bool_t passBetaCut = kTRUE;
403 +  if(vertices->GetEntries() > 0) {
404 +    Double_t Beta = JetTools::Beta2(jet, referenceVertex, 0.2);
405 +    Double_t Beta_other = 0.0;
406 +    for(UInt_t nv=0; nv<vertices->GetEntries(); nv++){
407 +      if (referenceVertex == vertices->At(nv)) continue;
408 +      Double_t BetaAux = JetTools::Beta2(jet, vertices->At(nv), 0.2);
409 +      if(BetaAux > Beta_other) Beta_other = BetaAux;
410 +    }
411 +    if(Beta_other > Beta) passBetaCut = kFALSE;
412 +  }
413 +
414 +  return passBetaCut;
415 +
416 + }
417 +
418 +
419 + Int_t JetTools::MaxBetaVertexIndex(const PFJet *jet, const VertexCol *vertices, Double_t  delta_z=0.2){  
420 +  
421 +  Int_t vertexIndex = -1;
422 +  double beta = -0.1;
423 +  for (UInt_t v=0; v < vertices->GetEntries(); v++){
424 +    Double_t betaTmp = JetTools::Beta(jet, vertices->At(v), delta_z);
425 +    if (betaTmp > beta) {
426 +      beta = betaTmp;
427 +      vertexIndex = v;
428 +    }
429 +  }
430 +  return vertexIndex;
431 +
432 + }
433 +
434 + Int_t JetTools::MaxBeta2VertexIndex(const PFJet *jet, const VertexCol *vertices, Double_t  delta_z=0.2){  
435 +  
436 +  Int_t vertexIndex = -1;
437 +  double beta = -0.1;
438 +  for (UInt_t v=0; v < vertices->GetEntries(); v++){
439 +    Double_t betaTmp = JetTools::Beta2(jet, vertices->At(v), delta_z);
440 +    if (betaTmp > beta) {
441 +      beta = betaTmp;
442 +      vertexIndex = v;
443 +    }
444 +  }
445 +  return vertexIndex;
446 +
447 + }
448 +
449 +
450 + Int_t JetTools::JetToPVAssociation(const PFJet *jet, const VertexCol *vertices, Double_t  delta_z=0.2){  
451 +
452 +  std::vector<float> verticesPt2(vertices->GetEntries());
453 +  for(UInt_t i=0;i<jet->NPFCands();i++){
454 +    if(jet->PFCand(i)->BestTrk()){
455 +      double minDZ = delta_z;
456 +      int trackVertexIndex = -1;
457 +      for (UInt_t v=0; v < vertices->GetEntries(); v++){
458 +        if (minDZ > TMath::Abs(jet->PFCand(i)->BestTrk()->DzCorrected(*vertices->At(v)))) {
459 +          minDZ = TMath::Abs(jet->PFCand(i)->BestTrk()->DzCorrected(*vertices->At(v)));
460 +          trackVertexIndex = v;
461 +        }
462 +      }
463 +      if (trackVertexIndex < 0) continue;
464 +      verticesPt2[trackVertexIndex]+= jet->PFCand(i)->BestTrk()->Pt()*jet->PFCand(i)->BestTrk()->Pt();
465 +    }
466 +  }
467 +
468 +  Int_t vertexIndex = 0;
469 +  float pt2Max = 0;
470 +  for (uint i=0; i < verticesPt2.size(); ++i){
471 +    if (pt2Max < verticesPt2[i]) {
472 +      pt2Max = verticesPt2[i];
473 +      vertexIndex = i;
474 +    }
475 +  }
476 +  return vertexIndex;
477 + }
478 + const PFCandidate* JetTools::leadCand(const PFJet *iJet,int iPFType,bool i2nd) {
479 +  int lCount = 0;
480 +  const PFCandidate *lCand = 0;
481 +  for(UInt_t i0 = 0; i0 < iJet->NPFCands(); i0++) {
482 +    lCand = iJet->PFCand(i0);
483 +    if(iPFType != -1 && lCand->PFType() != iPFType) continue;
484 +    if(lCount == 0 && !i2nd) break;
485 +    if(lCount >  0)          break;
486 +    lCount++;
487 +  }
488 +  return lCand;
489 + }
490 + Double_t JetTools::impactParameter(const PFJet *iJet,const Vertex *iVertex,bool iDZ) {
491 +  double lDZCorr = -1000;
492 +  for(UInt_t i0 = 0; i0 < iJet->NPFCands(); i0++) {
493 +    const PFCandidate *pCand = iJet->PFCand(i0);
494 +    if(pCand->TrackerTrk() == 0) continue;
495 +    //if(pCand->Pt() < 1.) continue; => previous iterations
496 +    if(iDZ)  lDZCorr = fabs(pCand->TrackerTrk()->DzCorrected(*iVertex));
497 +    if(!iDZ) lDZCorr = fabs(pCand->TrackerTrk()->D0Corrected(*iVertex));
498 +    break;
499 +  }
500 +  return lDZCorr;
501 + }
502 + Double_t JetTools::dRMean(const PFJet *iJet,int iPFType) {
503 +  double lDRMean = 0;
504 +  for(UInt_t i0 = 0; i0 < iJet->NPFCands(); i0++) {
505 +    const PFCandidate *pCand = iJet->PFCand(i0);
506 +    if(iPFType != -1 && pCand->PFType() != iPFType) continue;
507 +    double pDR = MathUtils::DeltaR(iJet->Mom(),pCand->Mom());
508 +    lDRMean    += pDR*(pCand->Pt())/iJet->RawMom().Pt();
509 +  }
510 +  return lDRMean;
511 + }
512 + Double_t JetTools::frac(const PFJet *iJet,Double_t iDRMax,Double_t iDRMin,Int_t iPFType) {
513 +  double lFrac = 0;
514 +  for(UInt_t i0 = 0; i0 < iJet->NPFCands(); i0++) {
515 +    const PFCandidate *pCand = iJet->PFCand(i0);
516 +    if(iPFType != -1 && pCand->PFType() != iPFType) continue;
517 +    Double_t pDR = MathUtils::DeltaR(iJet->Mom(),pCand->Mom());
518 +    if(pDR > iDRMax) continue;
519 +    if(pDR < iDRMax-0.1) continue;
520 +    lFrac += pCand->Pt()/iJet->Pt();
521 +  }
522 +  return lFrac;
523 + }
524 + Double_t JetTools::betaStar(const PFJet *iJet,const Vertex *iVertex,const VertexCol* iVertices,Double_t iDZCut) {
525 +  Double_t lTotal = 0;  
526 +  Double_t lPileup = 0;
527 +  for(UInt_t i0 = 0; i0 < iJet->NPFCands(); i0++) {
528 +    const PFCandidate* pPF   = iJet->PFCand(i0);
529 +    const Track* pTrack      = pPF->TrackerTrk();
530 +    //if(pPF->GsfTrk()) pTrack = pPF->GsfTrk(); ==> not used in CMSSW
531 +    if(pTrack == 0) continue;
532 +    lTotal += pPF->Pt();
533 +    double pDZPV  = fabs(pTrack->DzCorrected(*iVertex));
534 +    double pDZMin = pDZPV;
535 +    for(unsigned int i1 = 0; i1 < iVertices->GetEntries(); i1++) {
536 +      const Vertex *pV = iVertices->At(i1);
537 +      if(pV->Ndof() < 4 ||
538 +         (pV->Position() - iVertex->Position()).R() < 0.02 ) continue;
539 +      pDZMin = TMath::Min(pDZMin,fabs(pTrack->DzCorrected(*pV)));
540 +    }
541 +    if(pDZPV > 0.2 && pDZMin < 0.2) lPileup += pTrack->Pt();
542 +  }
543 +  if(lTotal == 0) lTotal = 1;
544 +  return lPileup/(lTotal);
545 + }
546 + Bool_t  JetTools::passPFLooseId(const PFJet *iJet) {
547 +  if(iJet->E()                              == 0)       return false;
548 +  if(iJet->NeutralHadronEnergy()/iJet->E()  >  0.99)    return false;
549 +  if(iJet->NeutralEmEnergy()/iJet->E()      >  0.99)    return false;
550 +  if(iJet->NConstituents()                  <  2)       return false;
551 +  if(iJet->ChargedHadronEnergy()/iJet->E()  <= 0     && fabs(iJet->Eta()) < 2.4 ) return false;
552 +  if(iJet->ChargedEmEnergy()/iJet->E()      >  0.99  && fabs(iJet->Eta()) < 2.4 ) return false;
553 +  if(iJet->ChargedMultiplicity()            < 1      && fabs(iJet->Eta()) < 2.4 ) return false;
554 +  return true;
555 + }
556 +
557 + /*
558 + double JetTools::genFrac(const PFJet *iJet) {
559 +  double lTrueFrac = 0;
560 +  for(UInt_t i0 = 0; i0 < fParticles->GetEntries(); i0++) {
561 +    const MCParticle *p = fParticles->At(i0);
562 +    if(p->Status() != 1) continue;
563 +    double pDEta = iJet->Eta() - p->Eta();
564 +    double pDPhi = fabs(iJet->Phi()-p->Phi()); if(pDPhi > 2.*TMath::Pi() - pDPhi) pDPhi =  2.*TMath::Pi() - pDPhi;
565 +    double pDR   = sqrt(pDEta*pDEta + pDPhi*pDPhi);
566 +    if(pDR > 0.5) continue;
567 +    lTrueFrac += p->Pt();
568 +  }
569 +  lTrueFrac/=iJet->Pt();
570 +  return lTrueFrac;
571 + }
572 + */

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