| Revision: | 1.6 |
| Committed: | Mon Jan 18 14:41:34 2010 UTC (15 years, 3 months ago) by bendavid |
| Content type: | text/plain |
| Branch: | MAIN |
| CVS Tags: | Mit_032, Mit_031, Mit_025c_branch2, Mit_025c_branch1, Mit_030, Mit_029c, Mit_029b, Mit_030_pre1, Mit_029a, Mit_029, Mit_029_pre1, Mit_028a, Mit_025c_branch0, Mit_028, Mit_027a, Mit_027, Mit_026, Mit_025e, Mit_025d, Mit_025c, Mit_025b, Mit_025a, Mit_025, Mit_025pre2, Mit_024b, Mit_025pre1, Mit_024a, Mit_024, Mit_023, Mit_022a, Mit_022, Mit_020d, TMit_020d, Mit_020c, Mit_021, Mit_021pre2, Mit_021pre1, Mit_020b, Mit_020a, Mit_020, Mit_020pre1, Mit_018, Mit_017, Mit_017pre3, Mit_017pre2, Mit_017pre1, V07-05-00, Mit_016, Mit_015b, Mit_015a, Mit_015, Mit_014e, Mit_014d, Mit_014c, Mit_014b, ConvRejection-10-06-09, Mit_014a, Mit_014, Mit_014pre3, Mit_014pre2, Mit_014pre1, Mit_013d, Mit_013c, Mit_013b, Mit_013a, Mit_013, Mit_013pre1, Mit_012i, HEAD |
| Branch point for: | Mit_025c_branch |
| Changes since 1.5: | +3 -1 lines |
| Log Message: | Fix Track Paramater phi-related bugs and add consistent propagation to origin |
| # | Content |
|---|---|
| 1 | //-------------------------------------------------------------------------------------------------- |
| 2 | // $Id: TrackParameters.h,v 1.5 2009/03/20 17:13:34 loizides Exp $ |
| 3 | // |
| 4 | // Description: class TrackParameters |
| 5 | // |
| 6 | // Class to manage track parameters of different conventions and convert one into the other. This is |
| 7 | // not really done very well and could be done more efficient but this is what it is for the moment. |
| 8 | // |
| 9 | // Original Author: Christoph Paus |
| 10 | // Created: Thu Aug 21 02:29:00 CEST 2008 |
| 11 | // |
| 12 | // ------------------------------------------------------------------------------------------------- |
| 13 | // CMS parameter ordering for the vector/matrix, which is assumed here: |
| 14 | // |
| 15 | // qoverp, lambda, phi0, dxy, dsz; (lambda = pi/2 - theta) |
| 16 | // mapping to CDF is therefore { 1*, 0*, 4, 3, 2* }, where * indicates that a transformation is |
| 17 | // needed |
| 18 | // |
| 19 | // Note that the radius of curvature (in cm) is then: |
| 20 | // |
| 21 | // Rc = cos(theta) / [ 0.0029979.... * (q/p) * B ], |
| 22 | // |
| 23 | // where B is the magnetic field in Tesla and tht is the angle between the field and the |
| 24 | // direction. With p * cos(theta) = pT it follows: |
| 25 | // |
| 26 | // Rc = pT / [ 0.0029979.... * q * B ], |
| 27 | // fullCurvature = 1 / Rc = 0.0029979 * q * B / pT = - 0.0029979 * B / pT. |
| 28 | // |
| 29 | // see the conventions for the MultiVertexFitter in its own header file. |
| 30 | // |
| 31 | // Author: C.Paus |
| 32 | //-------------------------------------------------------------------------------------------------- |
| 33 | |
| 34 | #ifndef MITEDM_VERTEXFITINTERFACE_TRACKPARAMETERS_H |
| 35 | #define MITEDM_VERTEXFITINTERFACE_TRACKPARAMETERS_H |
| 36 | |
| 37 | #include <TMatrixDSym.h> |
| 38 | #include <TVectorD.h> |
| 39 | #include "DataFormats/TrackReco/interface/Track.h" |
| 40 | #include "TrackingTools/TransientTrack/interface/TransientTrack.h" |
| 41 | |
| 42 | namespace mitedm |
| 43 | { |
| 44 | enum TrackConvention { // Define existing track parameter conventions |
| 45 | iCms, |
| 46 | iMvf |
| 47 | }; |
| 48 | |
| 49 | // Declare the track parameter class |
| 50 | class TrackParameters |
| 51 | { |
| 52 | public: |
| 53 | TrackParameters() {} |
| 54 | TrackParameters(const reco::TransientTrack &ttrk, TrackConvention tcv = iCms); |
| 55 | TrackParameters(const reco::Track *trk, TrackConvention tcv = iCms, double bField = 3.8); |
| 56 | TrackParameters(const TrackParameters &trk); |
| 57 | ~TrackParameters() {}; |
| 58 | |
| 59 | // Access the specific contents |
| 60 | const TVectorD *pars() const { return &pars_; }; |
| 61 | double pars(int i) const { return pars_[i]; }; |
| 62 | const TMatrixDSym *cMat() const { return &cMat_; }; |
| 63 | double cMat(int i, int j) const { return cMat_(i,j); }; |
| 64 | |
| 65 | // Access the different parametrizations independently of the local storage |
| 66 | TrackParameters cmsTrack() const; |
| 67 | TrackParameters mvfTrack() const; |
| 68 | |
| 69 | void setPars(int i, double v) { pars_(i) = v; } |
| 70 | void setCMat(int i, int j, double v) { cMat_(i,j) = v; } |
| 71 | void addCMat(int i, int j, double v) { cMat_(i,j) += v; } |
| 72 | |
| 73 | // Utilities |
| 74 | void print() const; |
| 75 | |
| 76 | private: |
| 77 | TrackConvention iConvention_; //track parameter convention (def. CMS) |
| 78 | double bField_; //magnetic field in Tesla |
| 79 | double fCurv_; //combined curvature constant |
| 80 | TVectorD pars_; //track paramters (helix) |
| 81 | TMatrixDSym cMat_; //corresponding covariance matrix (sig_i * sig_j) |
| 82 | }; |
| 83 | } |
| 84 | #endif |