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root/cvsroot/UserCode/MitPhysics/Utils/src/JetTools.cc
Revision: 1.13
Committed: Tue Apr 12 07:29:40 2011 UTC (14 years ago) by mzanetti
Content type: text/plain
Branch: MAIN
CVS Tags: Mit_020d, TMit_020d, Mit_020c, Mit_020b
Changes since 1.12: +110 -11 lines
Log Message:
jet to vertex association methods and beta2

File Contents

# User Rev Content
1 ceballos 1.1 #include "MitPhysics/Utils/interface/JetTools.h"
2 mzanetti 1.13 #include <algorithm>
3     #include <vector>
4 ceballos 1.1
5     ClassImp(mithep::JetTools)
6    
7     using namespace mithep;
8 mzanetti 1.13
9 ceballos 1.1
10     JetTools::JetTools()
11     {
12     // Constructor
13     }
14    
15     JetTools::~JetTools()
16     {
17     // Destructor.
18     }
19    
20     //Remember to remove the signal from particles before inputting into the function
21 mzanetti 1.6 Double_t JetTools::NJettiness(const ParticleOArr *particles, const JetOArr *jets, double Q, double Y){
22 ceballos 1.2 if(particles->GetEntries() <= 0) return 0.0;
23    
24 ceballos 1.1 Double_t fval = 0.0;
25     Double_t fvalpart;
26    
27     for(int i=0;i<int(particles->GetEntries());i++){
28     fvalpart = (particles->At(i)->Pt()) * TMath::Exp(-TMath::Abs(particles->At(i)->Eta()-Y));
29    
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()))));
34     }
35     fval = fval + fvalpart;
36     }
37 ceballos 1.2
38 mzanetti 1.6 fval = fval / Q;
39 ceballos 1.2
40 ceballos 1.1 return fval;
41     }
42    
43 mzanetti 1.6 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(MathUtils::DeltaPhi(jets->At(j)->Phi(),pfCandidates->At(i)->Phi()))));
56     }
57     fval = fval + fvalpart;
58     }
59    
60     fval = fval / Q;
61    
62     return fval;
63     }
64    
65     Double_t JetTools::NJettiness(const TrackOArr *tracks, const JetOArr *jets, double Q, double Y){
66 ceballos 1.2 if(tracks->GetEntries() <= 0) return 0.0;
67    
68 ceballos 1.1 Double_t fval = 0.0;
69     Double_t fvalpart;
70    
71     for(int i=0;i<int(tracks->GetEntries());i++){
72     fvalpart = (tracks->At(i)->Pt()) * TMath::Exp(-TMath::Abs(tracks->At(i)->Eta()-Y));
73    
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()))));
78     }
79     fval = fval + fvalpart;
80     }
81 ceballos 1.2
82 mzanetti 1.6 fval = fval / Q;
83 ceballos 1.2
84 ceballos 1.1 return fval;
85     }
86    
87 mzanetti 1.6 Double_t JetTools::NJettiness(const JetOArr *jetsS, const JetOArr *jets, double Q, double Y){
88 ceballos 1.2 if(jetsS->GetEntries() <= 0) return 0.0;
89    
90 ceballos 1.1 Double_t fval = 0.0;
91     Double_t fvalpart;
92    
93     for(int i=0;i<int(jetsS->GetEntries());i++){
94     fvalpart = (jetsS->At(i)->Pt()) * TMath::Exp(-TMath::Abs(jetsS->At(i)->Eta()-Y));
95    
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()))));
100     }
101     fval = fval + fvalpart;
102     }
103 ceballos 1.2
104 mzanetti 1.6 fval = fval / Q;
105 ceballos 1.2
106     return fval;
107     }
108    
109 mzanetti 1.6 Double_t JetTools::NJettiness(const CaloTowerOArr *calos, const JetOArr *jets, double Q, double Y){
110 ceballos 1.2 if(calos->GetEntries() <= 0) return 0.0;
111    
112     Double_t fval = 0.0;
113     Double_t fvalpart;
114    
115     for(int i=0;i<int(calos->GetEntries());i++){
116     fvalpart = (calos->At(i)->Pt()) * TMath::Exp(-TMath::Abs(calos->At(i)->Eta()-Y));
117    
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()))));
122     }
123     fval = fval + fvalpart;
124     }
125    
126 mzanetti 1.6 fval = fval / Q;
127 ceballos 1.2
128 ceballos 1.1 return fval;
129     }
130    
131     //M_r
132     Double_t JetTools::M_r(const ParticleOArr *particles){
133    
134     if(particles->GetEntries() < 2) return -999.;
135    
136     Double_t E0 = particles->At(0)->E();
137     Double_t E1 = particles->At(1)->E();
138     Double_t Pz0 = particles->At(0)->Pz();
139     Double_t Pz1 = particles->At(1)->Pz();
140    
141     Double_t den = TMath::Power(Pz0-Pz1, 2) - TMath::Power(E0-E1,2);
142     if(den <= 0) return -100.;
143    
144     return 2.0*TMath::Sqrt(TMath::Power(E0*Pz1 - E1*Pz0, 2)/den);
145     }
146    
147     //Beta_r
148     Double_t JetTools::Beta_r(const ParticleOArr *particles){
149    
150     if(particles->GetEntries() < 2) return -999.;
151    
152     Double_t E0 = particles->At(0)->E();
153     Double_t E1 = particles->At(1)->E();
154     Double_t Pz0 = particles->At(0)->Pz();
155     Double_t Pz1 = particles->At(1)->Pz();
156    
157     return (E0-E1)/(Pz0-Pz1);
158     }
159    
160     //M_r_t
161     Double_t JetTools::M_r_t(const ParticleOArr *particles, const Met *met){
162    
163     if(particles->GetEntries() < 2) return -999.;
164    
165     Double_t Pt0 = particles->At(0)->Pt();
166     Double_t Pt1 = particles->At(1)->Pt();
167     Double_t etmiss = met->Pt();
168    
169     Double_t Px0 = particles->At(0)->Px();
170     Double_t Px1 = particles->At(1)->Px();
171     Double_t metx = met->Px();
172     Double_t Py0 = particles->At(0)->Py();
173     Double_t Py1 = particles->At(1)->Py();
174     Double_t mety = met->Py();
175    
176     return TMath::Sqrt(0.5*etmiss*(Pt0 + Pt1) - 0.5*(metx*(Px0 + Px1) + mety*(Py0 + Py1)));
177     }
178    
179     //Razor
180     Double_t JetTools::Razor(const ParticleOArr *particles, const Met *met){
181     if(particles->GetEntries() < 2) return -999.;
182    
183     Double_t mr = M_r(particles);
184     Double_t mrt = M_r_t(particles,met);
185    
186     if(mr != 0) return mrt/mr;
187    
188     return -999.;
189     }
190    
191     //Cosine Omega
192 ceballos 1.3 Double_t JetTools::CosineOmega(const Particle *particles0, const Particle *particles1){
193 ceballos 1.1
194 ceballos 1.3 TLorentzVector v_L1(particles0->Px(),particles0->Py(),particles0->Pz(),particles0->E());
195     TLorentzVector v_L2(particles1->Px(),particles1->Py(),particles1->Pz(),particles1->E());
196 ceballos 1.1
197     Double_t beta = (v_L1.P()-v_L2.P())/(v_L1.Pz()-v_L2.Pz());
198    
199     TVector3 B;
200     B.SetXYZ(0.0,0.0,-1.0*beta);
201    
202     v_L1.Boost(B);
203     v_L2.Boost(B);
204    
205     Double_t cosomega = v_L1.Vect().Dot(v_L2.Vect())/(v_L1.P()*v_L2.P());
206    
207     return cosomega;
208     }
209    
210     //Transverse Higgs mass
211 ceballos 1.3 Double_t JetTools::MtHiggs(const ParticleOArr * leptons,
212 ceballos 1.4 const Met *met, double metFraction[2], int nsel){
213 ceballos 1.3 if(leptons->Entries() < 2) return -999.0;
214    
215 ceballos 1.1 double mtHiggs = -999.0;
216 ceballos 1.3 double enell = 0.0;
217     double enenn = 0.0;
218     double enex = 0.0;
219     double eney = 0.0;
220     double mll = 0.0;
221     double mnu = 0.0;
222     CompositeParticle *dilepton = new CompositeParticle();
223     dilepton->AddDaughter(leptons->At(0));
224     dilepton->AddDaughter(leptons->At(1));
225 ceballos 1.1
226     if (nsel == 0){ // Use of Mt mass and mnu == mll
227     enell = TMath::Sqrt(dilepton->Pt()*dilepton->Pt() + dilepton->Mt()*dilepton->Mt());
228     enenn = TMath::Sqrt(met->Pt() *met->Pt() + dilepton->Mt()*dilepton->Mt());
229     enex = dilepton->Px() + met->Px();
230     eney = dilepton->Py() + met->Py();
231     mll = dilepton->Mass();
232     mnu = mll;
233     }
234     else if(nsel == 1){ // Use of Mt mass and mnu == 0
235     enell = TMath::Sqrt(dilepton->Pt()*dilepton->Pt() + dilepton->Mt()*dilepton->Mt());
236     enenn = TMath::Sqrt(met->Pt() *met->Pt() + 0.0*0.0);
237     enex = dilepton->Px() + met->Px();
238     eney = dilepton->Py() + met->Py();
239     mll = dilepton->Mass();
240     mnu = 0.0;
241     }
242     else if(nsel == 2){ // Use of M mass and mnu == mll
243     enell = TMath::Sqrt(dilepton->Pt()*dilepton->Pt() + dilepton->Mass()*dilepton->Mass());
244     enenn = TMath::Sqrt(met->Pt() *met->Pt() + dilepton->Mass()*dilepton->Mass());
245     enex = dilepton->Px() + met->Px();
246     eney = dilepton->Py() + met->Py();
247     mll = dilepton->Mass();
248     mnu = mll;
249     }
250     else if(nsel == 3){ // Use of M mass and mnu == 0
251     enell = TMath::Sqrt(dilepton->Pt()*dilepton->Pt() + dilepton->Mass()*dilepton->Mass());
252     enenn = TMath::Sqrt(met->Pt() *met->Pt() + 0.0*0.0);
253     enex = dilepton->Px() + met->Px();
254     eney = dilepton->Py() + met->Py();
255     mll = dilepton->Mass();
256     mnu = 0.0;
257     }
258 ceballos 1.4 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 ceballos 1.3 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 ceballos 1.1 }
294 ceballos 1.11 else if(nsel == 7){ // Use of M mass and mnu == 0, no fancy stuff
295 ceballos 1.12 enell = TMath::Sqrt(dilepton->Pt()*dilepton->Pt() + dilepton->Mass()*dilepton->Mass());
296     enenn = TMath::Sqrt(met->Pt()*met->Pt() + 0.0*0.0);
297     enex = dilepton->Px() + met->Px();
298     eney = dilepton->Py() + met->Py();
299 ceballos 1.11 mtHiggs = (enell+enenn)*(enell+enenn) - enex*enex - eney*eney;
300     }
301 ceballos 1.1
302 ceballos 1.4 if(nsel >= 0 && nsel <= 4){
303 ceballos 1.3 mtHiggs = mll*mll + mnu*mnu + 2.0*(enell*enenn - enex*enex - eney*eney);
304     }
305 ceballos 1.11
306 ceballos 1.1 if(mtHiggs <= 0) mtHiggs = 0.0;
307     else mtHiggs = TMath::Sqrt(mtHiggs);
308    
309 ceballos 1.3 delete dilepton;
310    
311 ceballos 1.1 return mtHiggs;
312     }
313 ceballos 1.5
314 ceballos 1.9 Double_t JetTools::Beta(const TrackCol *tracks, Jet *jet, const Vertex *vertex, Double_t delta_z, Double_t delta_cone){
315    
316     if(tracks->GetEntries() <= 0) return 1.0;
317 ceballos 1.5
318     double Pt_jets_X = 0. ;
319     double Pt_jets_Y = 0. ;
320     double Pt_jets_X_tot = 0. ;
321     double Pt_jets_Y_tot = 0. ;
322    
323     for(int i=0;i<int(tracks->GetEntries());i++){
324     if(MathUtils::DeltaR(tracks->At(i)->Mom(),jet->Mom()) < delta_cone){
325     Pt_jets_X_tot += tracks->At(i)->Px();
326     Pt_jets_Y_tot += tracks->At(i)->Py();
327 ceballos 1.9 double pDz = TMath::Abs(tracks->At(i)->DzCorrected(*vertex));
328 ceballos 1.5 if(pDz < delta_z){
329     Pt_jets_X += tracks->At(i)->Px();
330     Pt_jets_Y += tracks->At(i)->Py();
331     }
332     }
333     }
334    
335 ceballos 1.8 if(sqrt(Pt_jets_X_tot*Pt_jets_X_tot + Pt_jets_Y_tot*Pt_jets_Y_tot) > 0)
336 ceballos 1.9 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);
337    
338     return 1.0;
339 ceballos 1.5 }
340    
341 ceballos 1.7
342 ceballos 1.9 Double_t JetTools::Beta(const PFJet *jet, const Vertex *vertex, Double_t delta_z){
343 mzanetti 1.13 double Pt_jets= 0. ;
344     double Pt_jetsTot = 0. ;
345 ceballos 1.7
346     for(UInt_t i=0;i<jet->NPFCands();i++){
347     if(jet->PFCand(i)->BestTrk()){
348 mzanetti 1.13 Pt_jetsTot += jet->PFCand(i)->BestTrk()->Pt();
349 ceballos 1.9 double pDz = TMath::Abs(jet->PFCand(i)->BestTrk()->DzCorrected(*vertex));
350 ceballos 1.7 if(pDz < delta_z){
351 mzanetti 1.13 Pt_jets += jet->PFCand(i)->BestTrk()->Pt();
352 ceballos 1.7 }
353     }
354     }
355    
356 mzanetti 1.13 Double_t beta = 1.0;
357     if (Pt_jetsTot > 0)
358     beta = Pt_jets/Pt_jetsTot;
359    
360     return beta;
361     }
362    
363     Double_t JetTools::Beta2(const PFJet *jet, const Vertex *vertex, Double_t delta_z){
364     double Pt_jets= 0. ;
365     double Pt_jetsTot = 0. ;
366    
367     for(UInt_t i=0;i<jet->NPFCands();i++){
368     if(jet->PFCand(i)->BestTrk()){
369     Pt_jetsTot += jet->PFCand(i)->BestTrk()->Pt()*jet->PFCand(i)->BestTrk()->Pt();
370     double pDz = TMath::Abs(jet->PFCand(i)->BestTrk()->DzCorrected(*vertex));
371     if(pDz < delta_z){
372     Pt_jets += jet->PFCand(i)->BestTrk()->Pt()*jet->PFCand(i)->BestTrk()->Pt();
373     }
374     }
375     }
376 ceballos 1.9
377 mzanetti 1.13 Double_t beta = 1.0;
378     if (Pt_jetsTot > 0)
379     beta = Pt_jets/Pt_jetsTot;
380     return beta;
381 ceballos 1.7 }
382 sixie 1.10
383    
384     Bool_t JetTools::PassBetaVertexAssociationCut(const PFJet *jet, const Vertex *referenceVertex, const VertexCol *vertices, Double_t delta_z) {
385    
386     Bool_t passBetaCut = kTRUE;
387     if(vertices->GetEntries() > 0) {
388     Double_t Beta = JetTools::Beta(jet, referenceVertex, 0.2);
389     Double_t Beta_other = 0.0;
390     for(UInt_t nv=0; nv<vertices->GetEntries(); nv++){
391     if (referenceVertex == vertices->At(nv)) continue;
392     Double_t BetaAux = JetTools::Beta(jet, vertices->At(nv), 0.2);
393     if(BetaAux > Beta_other) Beta_other = BetaAux;
394     }
395     if(Beta_other > Beta) passBetaCut = kFALSE;
396     }
397    
398     return passBetaCut;
399    
400     }
401 mzanetti 1.13
402     Bool_t JetTools::PassBeta2VertexAssociationCut(const PFJet *jet, const Vertex *referenceVertex, const VertexCol *vertices, Double_t delta_z) {
403    
404     Bool_t passBetaCut = kTRUE;
405     if(vertices->GetEntries() > 0) {
406     Double_t Beta = JetTools::Beta2(jet, referenceVertex, 0.2);
407     Double_t Beta_other = 0.0;
408     for(UInt_t nv=0; nv<vertices->GetEntries(); nv++){
409     if (referenceVertex == vertices->At(nv)) continue;
410     Double_t BetaAux = JetTools::Beta2(jet, vertices->At(nv), 0.2);
411     if(BetaAux > Beta_other) Beta_other = BetaAux;
412     }
413     if(Beta_other > Beta) passBetaCut = kFALSE;
414     }
415    
416     return passBetaCut;
417    
418     }
419    
420    
421     Int_t JetTools::MaxBetaVertexIndex(const PFJet *jet, const VertexCol *vertices, Double_t delta_z=0.2){
422    
423     Int_t vertexIndex = -1;
424     double beta = -0.1;
425     for (UInt_t v=0; v < vertices->GetEntries(); v++){
426     Double_t betaTmp = JetTools::Beta(jet, vertices->At(v), delta_z);
427     if (betaTmp > beta) {
428     beta = betaTmp;
429     vertexIndex = v;
430     }
431     }
432     return vertexIndex;
433    
434     }
435    
436     Int_t JetTools::MaxBeta2VertexIndex(const PFJet *jet, const VertexCol *vertices, Double_t delta_z=0.2){
437    
438     Int_t vertexIndex = -1;
439     double beta = -0.1;
440     for (UInt_t v=0; v < vertices->GetEntries(); v++){
441     Double_t betaTmp = JetTools::Beta2(jet, vertices->At(v), delta_z);
442     if (betaTmp > beta) {
443     beta = betaTmp;
444     vertexIndex = v;
445     }
446     }
447     return vertexIndex;
448    
449     }
450    
451    
452     Int_t JetTools::JetToPVAssociation(const PFJet *jet, const VertexCol *vertices, Double_t delta_z=0.2){
453    
454     std::vector<float> verticesPt2(vertices->GetEntries());
455     for(UInt_t i=0;i<jet->NPFCands();i++){
456     if(jet->PFCand(i)->BestTrk()){
457     double minDZ = delta_z;
458     int trackVertexIndex = -1;
459     for (UInt_t v=0; v < vertices->GetEntries(); v++){
460     if (minDZ > TMath::Abs(jet->PFCand(i)->BestTrk()->DzCorrected(*vertices->At(v)))) {
461     minDZ = TMath::Abs(jet->PFCand(i)->BestTrk()->DzCorrected(*vertices->At(v)));
462     trackVertexIndex = v;
463     }
464     }
465     if (trackVertexIndex < 0) continue;
466     verticesPt2[trackVertexIndex]+= jet->PFCand(i)->BestTrk()->Pt()*jet->PFCand(i)->BestTrk()->Pt();
467     }
468     }
469    
470     Int_t vertexIndex = 0;
471     float pt2Max = 0;
472     for (uint i=0; i < verticesPt2.size(); ++i){
473     if (pt2Max < verticesPt2[i]) {
474     pt2Max = verticesPt2[i];
475     vertexIndex = i;
476     }
477     }
478     return vertexIndex;
479     }