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root/cvsroot/UserCode/MitAna/DataTree/interface/Track.h
Revision: 1.49
Committed: Sun Apr 4 21:34:27 2010 UTC (15 years, 1 month ago) by bendavid
Content type: text/plain
Branch: MAIN
CVS Tags: Mit_013d
Changes since 1.48: +14 -1 lines
Log Message: 
Add DzCorrected function

File Contents

# User Rev Content
1 loizides 1.1 //--------------------------------------------------------------------------------------------------
2 bendavid 1.49 // $Id: Track.h,v 1.48 2010/03/23 16:52:46 bendavid Exp $
3 loizides 1.1 //
4     // Track
5     //
6 bendavid 1.15 // We store the CMSSW track parameterization
7     // Parameters associated to the 5D curvilinear covariance matrix:
8     // (qoverp, lambda, phi, dxy, dsz)
9     // defined as:
10     // qoverp = q / abs(p) = signed inverse of momentum [1/GeV]
11     // lambda = pi/2 - polar angle at the given point
12     // phi = azimuth angle at the given point
13     // dxy = -vx*sin(phi) + vy*cos(phi) [cm]
14     // dsz = vz*cos(lambda) - (vx*cos(phi)+vy*sin(phi))*sin(lambda) [cm]
15 loizides 1.18 // (See http://cmslxr.fnal.gov/lxr/source/DataFormats/TrackReco/interface/TrackBase.h)
16 bendavid 1.15 //
17     // Format for fHits: (We do not use anything resembling reco::HitPattern from CMSSW because that
18     // data format requires 800 bits per track!)
19     // There is a one to one mapping between bits and tracker layers, where layers are enumerated
20     // seperately in the PXB, PXF, TIB, TID, TOB, TEC and r-phi and stereo modules are treated as
21     // seperate layers in those detectors which have them
22 bendavid 1.25 // (TIB L1,L2, TID L1,L2,L3, TOB L1,L2, TEC L1,L2,L3,L4,L5,L6,L7,L8,L9).
23 bendavid 1.15 //
24     // A bit value of 1 indicates a hit in the corresponding layer, and 0 indicates no hit.
25     //
26     // Note that currently this only stores information about hits in the Tracker,
27 loizides 1.16 // but muon chamber information will likely be added as well.
28 bendavid 1.15 //
29     // Bit-Layer assignments (starting from bit 0):
30     // Bit 0: PXB L1
31     // Bit 1: PXB L2
32     // Bit 2: PXB L3
33     // Bit 3: PXF L1
34     // Bit 4: PXF L2
35     // Bit 5: TIB L1 r-phi
36     // Bit 6: TIB L1 stereo
37     // Bit 7: TIB L2 r-phi
38     // Bit 8: TIB L2 stereo
39     // Bit 9: TIB L3 r-phi
40     // Bit 10: TIB L4 r-phi
41 loizides 1.16 // Bit 11: TID L1 r-phi
42 bendavid 1.15 // Bit 12: TID L1 stereo
43 loizides 1.16 // Bit 13: TID L2 r-phi
44 bendavid 1.15 // Bit 14: TID L2 stereo
45 loizides 1.16 // Bit 15: TID L3 r-phi
46 bendavid 1.23 // Bit 16: TID L3 stereo
47     // Bit 17: TOB L1 r-phi
48     // Bit 18: TOB L1 stereo
49     // Bit 19: TOB L2 r-phi
50     // Bit 20: TOB L2 stereo
51     // Bit 21: TOB L3 r-phi
52     // Bit 22: TOB L4 r-phi
53     // Bit 23: TOB L5 r-phi
54     // Bit 24: TOB L6 r-phi
55     // Bit 25: TEC L1 r-phi
56     // Bit 26: TEC L1 stereo
57     // Bit 27: TEC L2 r-phi
58     // Bit 28: TEC L2 stereo
59     // Bit 29: TEC L3 r-phi
60     // Bit 30: TEC L3 stereo
61     // Bit 31: TEC L4 r-phi
62     // Bit 32: TEC L4 stereo
63     // Bit 33: TEC L5 r-phi
64     // Bit 34: TEC L5 stereo
65     // Bit 35: TEC L6 r-phi
66     // Bit 36: TEC L6 stereo
67     // Bit 37: TEC L7 r-phi
68     // Bit 38: TEC L7 stereo
69     // Bit 39: TEC L8 r-phi
70     // Bit 40: TEC L8 stereo
71     // Bit 41: TEC L9 r-phi
72     // Bit 42: TEC L9 stereo
73 loizides 1.1 //
74 loizides 1.5 // Authors: C.Loizides, J.Bendavid, C.Paus
75 loizides 1.1 //--------------------------------------------------------------------------------------------------
76 loizides 1.7
77 loizides 1.17 #ifndef MITANA_DATATREE_TRACK_H
78     #define MITANA_DATATREE_TRACK_H
79 paus 1.6
80 loizides 1.36 #include "MitAna/DataCont/interface/BitMask.h"
81 bendavid 1.47 #include "MitAna/DataTree/interface/TrackQuality.h"
82 loizides 1.35 #include "MitAna/DataTree/interface/BaseVertex.h"
83 paus 1.6 #include "MitAna/DataTree/interface/DataObject.h"
84 loizides 1.35 #include "MitAna/DataTree/interface/MCParticle.h"
85 bendavid 1.27 #include "MitAna/DataTree/interface/SuperCluster.h"
86 loizides 1.1
87     namespace mithep
88     {
89     class Track : public DataObject
90     {
91     public:
92 loizides 1.18 enum EHitLayer {
93     PXB1,
94     PXB2,
95     PXB3,
96     PXF1,
97     PXF2,
98     TIB1,
99     TIB1S,
100     TIB2,
101     TIB2S,
102     TIB3,
103     TIB4,
104     TID1,
105     TID1S,
106     TID2,
107     TID2S,
108     TID3,
109 bendavid 1.23 TID3S,
110 loizides 1.18 TOB1,
111     TOB1S,
112     TOB2,
113     TOB2S,
114     TOB3,
115     TOB4,
116     TOB5,
117     TOB6,
118     TEC1,
119     TEC1S,
120     TEC2,
121     TEC2S,
122     TEC3,
123 bendavid 1.23 TEC3S,
124 loizides 1.18 TEC4,
125 bendavid 1.23 TEC4S,
126 loizides 1.18 TEC5,
127     TEC5S,
128     TEC6,
129 bendavid 1.23 TEC6S,
130 loizides 1.18 TEC7,
131 bendavid 1.23 TEC7S,
132 loizides 1.18 TEC8,
133 bendavid 1.23 TEC8S,
134     TEC9,
135     TEC9S
136 loizides 1.18 };
137    
138 loizides 1.44 enum ETrackAlgorithm { //taken from DataFormats/TrackReco/interface/TrackBase.h
139 bendavid 1.43 undefAlgorithm=0,
140     ctf=1,
141     rs=2,
142     cosmics=3,
143     iter0=4,
144     iter1=5,
145     iter2=6,
146     iter3=7,
147     iter4=8,
148     iter5=9,
149     iter6=10,
150     iter7=11,
151     iter8=12,
152     iter9=13,
153     iter10=14,
154     outInEcalSeededConv=15,
155     inOutEcalSeededConv=16,
156     nuclInter=17,
157     standAloneMuon=18,
158     globalMuon=19,
159     cosmicStandAloneMuon=20,
160     cosmicGlobalMuon=21,
161     iter1LargeD0=22,
162     iter2LargeD0=23,
163     iter3LargeD0=24,
164     iter4LargeD0=25,
165     iter5LargeD0=26,
166     bTagGhostTracks=27,
167     beamhalo=28,
168     algoSize=29
169     };
170    
171    
172     Track() : fAlgo(undefAlgorithm), fIsGsf(0), fQOverP(0), fQOverPErr(0),
173     fLambda(0), fLambdaErr(0), fPhi0(0), fPhi0Err(0),
174     fDxy(0), fDxyErr(0), fDsz(0), fDszErr(0), fChi2(0),
175     fNdof(0), fEtaEcal(0), fPhiEcal(0) {}
176 bendavid 1.15 Track(Double_t qOverP, Double_t lambda, Double_t phi0, Double_t dxy, Double_t dsz) :
177 bendavid 1.43 fAlgo(undefAlgorithm), fIsGsf(0), fQOverP(qOverP), fQOverPErr(0),
178     fLambda(lambda), fLambdaErr(0), fPhi0(phi0), fPhi0Err(0),
179     fDxy(dxy), fDxyErr(0), fDsz(dsz), fDszErr(0), fChi2(0),
180     fNdof(0), fEtaEcal(0), fPhiEcal(0) {}
181 loizides 1.1 ~Track() {}
182    
183 bendavid 1.43 ETrackAlgorithm Algo() const { return fAlgo; }
184 loizides 1.34 Int_t Charge() const { return (fQOverP>0) ? 1 : -1; }
185     Double_t Chi2() const { return fChi2; }
186     void ClearHit(EHitLayer l) { fHits.ClearBit(l); }
187     Double_t D0() const { return -fDxy; }
188     Double_t D0Corrected(const BaseVertex &iVertex) const;
189 bendavid 1.49 Double_t DzCorrected(const BaseVertex &iVertex) const;
190 loizides 1.34 Double_t D0Err() const { return fDxyErr; }
191     Double_t Dsz() const { return fDsz; }
192     Double_t DszErr() const { return fDszErr; }
193     Double_t Dxy() const { return fDxy; }
194     Double_t DxyErr() const { return fDxyErr; }
195     Double_t E(Double_t m) const { return TMath::Sqrt(E2(m)); }
196     Double_t E2(Double_t m) const { return P2()+m*m; }
197     Double_t Eta() const { return Mom().Eta(); }
198     Double_t EtaEcal() const { return fEtaEcal; }
199     Bool_t Hit(EHitLayer l) const { return fHits.TestBit(l); }
200     const BitMask48 &Hits() const { return fHits; }
201 bendavid 1.48 const BitMask48 &MissingHits() const { return fMissingHits; }
202     const BitMask48 &ExpectedHitsInner() const { return fExpectedHitsInner; }
203     const BitMask48 &ExpectedHitsOuter() const { return fExpectedHitsOuter; }
204 bendavid 1.43 Bool_t IsGsf() const { return fIsGsf; }
205 loizides 1.34 Double_t Lambda() const { return fLambda; }
206     Double_t LambdaErr() const { return fLambdaErr; }
207     const MCParticle *MCPart() const { return fMCParticleRef.Obj(); }
208     const ThreeVectorC &Mom() const;
209 pharris 1.41 FourVectorM Mom4(Double_t m) const { return FourVectorM(Pt(),Eta(),Phi(),m); }
210 loizides 1.38 UShort_t Ndof() const { return fNdof; }
211 loizides 1.34 UInt_t NHits() const { return fHits.NBitsSet(); }
212 bendavid 1.48 UInt_t NMissingHits() const { return fMissingHits.NBitsSet(); }
213     UInt_t NExpectedHitsInner() const { return fExpectedHitsInner.NBitsSet(); }
214     UInt_t NExpectedHitsOuter() const { return fExpectedHitsOuter.NBitsSet(); }
215 loizides 1.34 UInt_t NStereoHits() const { return StereoHits().NBitsSet(); }
216 bendavid 1.46 UInt_t NPixelHits() const { return PixelHits().NBitsSet(); }
217 loizides 1.34 EObjType ObjType() const { return kTrack; }
218     Double_t P2() const { return 1./fQOverP/fQOverP; }
219     Double_t P() const { return TMath::Abs(1./fQOverP); }
220     Double_t Phi() const { return fPhi0; }
221     Double_t Phi0() const { return fPhi0; }
222     Double_t Phi0Err() const { return fPhi0Err; }
223     Double_t PhiEcal() const { return fPhiEcal; }
224     Double_t Prob() const { return TMath::Prob(fChi2,fNdof); }
225     Double_t Pt() const { return Mom().Rho(); }
226     Double_t Px() const { return Mom().X(); }
227     Double_t Py() const { return Mom().Y(); }
228     Double_t Pz() const { return Mom().Z(); }
229     Double_t QOverP() const { return fQOverP; }
230     Double_t QOverPErr() const { return fQOverPErr; }
231 loizides 1.37 Double_t RChi2() const { return fChi2/(Double_t)fNdof; }
232 loizides 1.34 Double_t Theta() const { return (TMath::PiOver2() - fLambda); }
233     const SuperCluster *SCluster() const { return fSuperClusterRef.Obj(); }
234 bendavid 1.45 const BitMask48 PixelHits() const { return (fHits & PixelLayers()); }
235 bendavid 1.47 const TrackQuality &Quality() const { return fQuality; }
236     TrackQuality &Quality() { return fQuality; }
237 loizides 1.34 const BitMask48 StereoHits() const { return (fHits & StereoLayers()); }
238 bendavid 1.43 void SetAlgo(ETrackAlgorithm e) { fAlgo = e; }
239 loizides 1.34 void SetChi2(Double_t chi2) { fChi2 = chi2; }
240     void SetErrors(Double_t qOverPErr, Double_t lambdaErr, Double_t phi0Err,
241     Double_t dXyErr, Double_t dSzErr);
242     void SetEtaEcal(Double_t eta) { fEtaEcal = eta; }
243     void SetHelix (Double_t qOverP, Double_t lambda, Double_t phi0,
244     Double_t dXy, Double_t dSz);
245     void SetHit(EHitLayer l) { fHits.SetBit(l); }
246     void SetHits(const BitMask48 &hits) { fHits = hits; }
247 bendavid 1.48 void SetMissingHits(const BitMask48 &h) { fMissingHits = h; }
248     void SetExpectedHitsInner(const BitMask48 &h) { fExpectedHitsInner = h; }
249     void SetExpectedHitsOuter(const BitMask48 &h) { fExpectedHitsInner = h; }
250 bendavid 1.43 void SetIsGsf(Bool_t b) { fIsGsf = b; }
251 loizides 1.38 void SetNdof(UShort_t dof) { fNdof = dof; }
252 loizides 1.34 void SetMCPart(const MCParticle *p) { fMCParticleRef = p; }
253     void SetPhiEcal(Double_t phi) { fPhiEcal = phi; }
254     void SetSCluster(const SuperCluster* sc) { fSuperClusterRef = sc; }
255 bendavid 1.49 Double_t X0() const { return D0()*TMath::Sin(Phi()); }
256     Double_t Y0() const { return -D0()*TMath::Cos(Phi()); }
257 loizides 1.37 Double_t Z0() const { return fDsz/TMath::Cos(fLambda); }
258 loizides 1.30
259 bendavid 1.45
260     static const BitMask48 StereoLayers();
261     static const BitMask48 PixelLayers();
262 loizides 1.18
263 paus 1.4 protected:
264 loizides 1.34 void ClearMom() const { fCacheMomFlag.ClearCache(); }
265     void GetMom() const;
266    
267     BitMask48 fHits; //storage for mostly hit information
268 bendavid 1.48 BitMask48 fMissingHits; //missing hits in crossed good modules
269     BitMask48 fExpectedHitsInner; //expected hits before first hit
270     BitMask48 fExpectedHitsOuter; //expected hits after last hit
271 bendavid 1.43 ETrackAlgorithm fAlgo; //track algorithm
272 bendavid 1.47 TrackQuality fQuality; //track quality
273 bendavid 1.43 Bool_t fIsGsf; //flag to identify gsf tracks
274 loizides 1.38 Double32_t fQOverP; //[0,0,14]signed inverse of momentum [1/GeV]
275     Double32_t fQOverPErr; //[0,0,14]error of q/p
276     Double32_t fLambda; //[0,0,14]pi/2 - polar angle at the reference point
277     Double32_t fLambdaErr; //[0,0,14]error of lambda
278     Double32_t fPhi0; //[0,0,14]azimuth angle at the given point
279     Double32_t fPhi0Err; //[0,0,14]error of azimuthal angle
280     Double32_t fDxy; //[0,0,14]trans. distance to reference point [cm]
281     Double32_t fDxyErr; //[0,0,14]error of transverse distance
282     Double32_t fDsz; //[0,0,14]long. distance to reference point [cm]
283     Double32_t fDszErr; //[0,0,14]error of longitudinal distance
284     Double32_t fChi2; //[0,0,12]chi squared of track fit
285     UShort_t fNdof; //degree-of-freedom of track fit
286 loizides 1.40 Double32_t fEtaEcal; //[0,0,12]eta of track at Ecal front face
287     Double32_t fPhiEcal; //[0,0,12]phi of track at Ecal front face
288 loizides 1.34 Ref<SuperCluster> fSuperClusterRef; //superCluster crossed by track
289     Ref<MCParticle> fMCParticleRef; //reference to sim particle (for monte carlo)
290     mutable CacheFlag fCacheMomFlag; //||cache validity flag for momentum
291     mutable ThreeVectorC fCachedMom; //!cached momentum vector
292 loizides 1.5
293 bendavid 1.48 ClassDef(Track, 4) // Track class
294 loizides 1.1 };
295 loizides 1.5 }
296 loizides 1.1
297 loizides 1.5 //--------------------------------------------------------------------------------------------------
298 loizides 1.34 inline void mithep::Track::GetMom() const
299     {
300     // Compute three momentum.
301    
302     Double_t pt = TMath::Abs(TMath::Cos(fLambda)/fQOverP);
303     Double_t eta = - TMath::Log(TMath::Tan(Theta()/2.));
304     fCachedMom.SetCoordinates(pt,eta,Phi());
305     }
306    
307     //--------------------------------------------------------------------------------------------------
308     inline const mithep::ThreeVectorC &mithep::Track::Mom() const
309     {
310     // Return cached momentum value.
311    
312     if (!fCacheMomFlag.IsValid()) {
313     GetMom();
314     fCacheMomFlag.SetValid();
315     }
316     return fCachedMom;
317     }
318    
319     //--------------------------------------------------------------------------------------------------
320     inline Double_t mithep::Track::D0Corrected(const BaseVertex &iVertex) const
321 bendavid 1.28 {
322 loizides 1.30 // Return corrected d0 with respect to primary vertex or beamspot.
323 bendavid 1.28
324     Double_t lXM = -TMath::Sin(Phi()) * D0();
325     Double_t lYM = TMath::Cos(Phi()) * D0();
326 loizides 1.34 Double_t lDX = (lXM + iVertex.X());
327     Double_t lDY = (lYM + iVertex.Y());
328 bendavid 1.28 Double_t d0Corr = (Px()*lDY - Py()*lDX)/Pt();
329    
330     return d0Corr;
331     }
332    
333     //--------------------------------------------------------------------------------------------------
334 bendavid 1.49 inline Double_t mithep::Track::DzCorrected(const mithep::BaseVertex &iVertex) const
335     {
336     // Compute Dxy with respect to a given position
337     mithep::ThreeVector momPerp(Px(),Py(),0);
338     mithep::ThreeVector posPerp(X0()-iVertex.X(),Y0()-iVertex.Y(),0);
339     return Z0() - iVertex.Z() - posPerp.Dot(momPerp)/Pt() * (Pz()/Pt());
340    
341     }
342    
343     //--------------------------------------------------------------------------------------------------
344 loizides 1.44 inline void mithep::Track::SetHelix(Double_t qOverP, Double_t lambda, Double_t phi0,
345     Double_t dxy, Double_t dsz)
346 loizides 1.5 {
347 loizides 1.13 // Set helix parameters.
348    
349 bendavid 1.15 fQOverP = qOverP;
350     fLambda = lambda;
351     fPhi0 = phi0;
352     fDxy = dxy;
353     fDsz = dsz;
354 loizides 1.34 ClearMom();
355 paus 1.4 }
356    
357 loizides 1.5 //--------------------------------------------------------------------------------------------------
358 loizides 1.44 inline void mithep::Track::SetErrors(Double_t qOverPErr, Double_t lambdaErr, Double_t phi0Err,
359     Double_t dxyErr, Double_t dszErr)
360 loizides 1.5 {
361 loizides 1.13 // Set helix errors.
362    
363 bendavid 1.15 fQOverPErr = qOverPErr;
364     fLambdaErr = lambdaErr;
365     fPhi0Err = phi0Err;
366     fDxyErr = dxyErr;
367     fDszErr = dszErr;
368 paus 1.4 }
369 loizides 1.13
370     //--------------------------------------------------------------------------------------------------
371 loizides 1.44 inline const mithep::BitMask48 mithep::Track::StereoLayers()
372 bendavid 1.26 {
373 loizides 1.35 // Build and return BitMask of stereo layers.
374 bendavid 1.26
375     mithep::BitMask48 stereoLayers;
376     stereoLayers.SetBit(mithep::Track::TIB1S);
377     stereoLayers.SetBit(mithep::Track::TIB2S);
378     stereoLayers.SetBit(mithep::Track::TID1S);
379     stereoLayers.SetBit(mithep::Track::TID2S);
380     stereoLayers.SetBit(mithep::Track::TID3S);
381     stereoLayers.SetBit(mithep::Track::TOB1S);
382     stereoLayers.SetBit(mithep::Track::TOB2S);
383     stereoLayers.SetBit(mithep::Track::TEC1S);
384     stereoLayers.SetBit(mithep::Track::TEC2S);
385     stereoLayers.SetBit(mithep::Track::TEC3S);
386     stereoLayers.SetBit(mithep::Track::TEC4S);
387     stereoLayers.SetBit(mithep::Track::TEC5S);
388     stereoLayers.SetBit(mithep::Track::TEC6S);
389     stereoLayers.SetBit(mithep::Track::TEC7S);
390     stereoLayers.SetBit(mithep::Track::TEC8S);
391     stereoLayers.SetBit(mithep::Track::TEC9S);
392     return stereoLayers;
393     }
394 bendavid 1.45
395     //--------------------------------------------------------------------------------------------------
396     inline const mithep::BitMask48 mithep::Track::PixelLayers()
397     {
398     // Build and return BitMask of stereo layers.
399    
400     mithep::BitMask48 pixelLayers;
401     pixelLayers.SetBit(mithep::Track::PXB1);
402     pixelLayers.SetBit(mithep::Track::PXB2);
403     pixelLayers.SetBit(mithep::Track::PXB3);
404     pixelLayers.SetBit(mithep::Track::PXF1);
405     pixelLayers.SetBit(mithep::Track::PXF2);
406     return pixelLayers;
407     }
408 loizides 1.5 #endif