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//--------------------------------------------------------------------------------------------------
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// $Id: MultiVertexFitter.h,v 1.6 2008/09/14 15:28:18 loizides Exp $
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//
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// MultiVertexFitter class header file
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//
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// Author: Craig Blocker, Brandeis CDF Group
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// Christoph Paus, MIT
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// + porting to CMS
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// + major cleanup
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// + removed track dependency
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// - removed CLHEP dependence, now using root for vector/matrix operations
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// - re-enbale the track extrapolation
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//
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// Description: Does generic wrapping of the multiple vertex fitter (wrapper of CTVMFT).
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//
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// Revision History:
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// May 27, 1999 Craig Blocker Creation
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// Jun 22, 2001 Craig Blocker Fix a few bugs in checking on vertices (such as pointing to
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// primary vertex wasn't allowed)
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// May 07 2002 Mat Martin Added support for "zero track" vertices: Pointing multi track
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// Jonas Rademacker vertices at another vertex which has no tracks directly
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// associated with it. This is acheived through the routine:
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// vertexPoint_0track. See the implementation in
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// MultiVertexFitter.cc
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// Sep 07, 2002 Joao Guimaraes Added accessors for ijk errors and track-id of tracks that
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// produce some of those errors. These methods are:
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// getIJKErr(int&,int&,int&) const
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// getIJKErr0() const
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// getIJKErr1() const
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// getIJKErr2() const
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// getErrTrackId() const
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// Sep 15, 2002 Joao Guimaraes Increased maximum number of tracks to 50 (_maxtrk).
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// Nov 11, 2002 Craig Blocker Put protection in Fortran for potential bombs [divide by zero,
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// sqrt(neg. number]. Added particle specific addTrack routines
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// (addElectron, addPion, etc.) Added methods to directly access
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// the ctvmft error matrix and pointers.
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//
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// Mar 18, 2003 Dmitry Litvintsev added ability to restore the state of MultiVertexFitter
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// object from FORTRAN common blocks function is
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// 'restoreFromCommons()' use it with care, fortran common blocks
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// have to be properly initialised. Contact me if unsure how to
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// use it. This routine is not needed for standard use of
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// MultiVertexFitter.
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// Oct 15, 2003 Sal Rappoccio Added accessor to add tracks to ctvmft via a track id and the
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// track parameters and covariance
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// Dec 02, 2003 Sal Rappoccio Added an interface to use extrapolated track errors in a
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// "transparent" way. The new interface is used as:
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//
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// MultiVertexFitter fit;
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// fit.init();
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// fit.setPrimaryVertex(p1); // Note: the order matters
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// fit.setReferencePoint(p2);
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// fit.addTrack(trk1, M_PION, 1);
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// fit.addTrack(trk2, M_PION, 1);
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// fit.fit();
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// Hep3Vector &pos = fit.getVertex(1);
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//
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// "pos" will now hold the new vertex constructed from tracks
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// with errors referenced at the new reference point "p2". This
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// track extrapolation code is OFF by default. To turn it ON use:
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//
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// fit.setReferencePoint(p2);
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//
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// AddTrack was modified to implement this feature.
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// Jul 18, 2008 Christoph Paus Works for CMS and any other type of Helix fitting.
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//--------------------------------------------------------------------------------------------------
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#ifndef MITCOMMON_VERTEXFIT_MULTIVERTEXFITTER_H
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#define MITCOMMON_VERTEXFIT_MULTIVERTEXFITTER_H
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#include <string>
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#include <iostream>
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#include <Rtypes.h>
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#include <TVectorD.h>
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#include <TMatrixDSym.h>
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#include <CLHEP/Vector/LorentzVector.h>
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#include <CLHEP/Vector/ThreeVector.h>
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#include <CLHEP/Matrix/SymMatrix.h>
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#include <CLHEP/Matrix/Vector.h>
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#include "MitCommon/DataFormats/interface/Types.h"
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#include "MitCommon/Ctvmft/interface/dimensions.hh"
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//-------------------------------------------------------------------------------------------------
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// Fortran routines to get address of the start of the ctvmq and ctvmfr common blocks
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//-------------------------------------------------------------------------------------------------
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extern "C" {
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int ctvmq_address_ (void);
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int ctvmfr_address_(void);
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int fiddle_address_(void);
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int trkprm_address_(void);
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}
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namespace mithep {
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class MultiVertexFitter {
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public:
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//--------------------------------------------------------------------------------------------
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// Enumerations
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//--------------------------------------------------------------------------------------------
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enum vertexNumber { PRIMARY_VERTEX,VERTEX_1,VERTEX_2,VERTEX_3,VERTEX_4,VERTEX_5,VERTEX_6 };
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enum vertexIndex { X_INDEX=0, Y_INDEX, Z_INDEX, P1_INDEX, P2_INDEX };
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enum trackIndex { CURVATURE_INDEX=0, PHI_INDEX, COTTH_INDEX };
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//--------------------------------------------------------------------------------------------
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// *structors
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//--------------------------------------------------------------------------------------------
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MultiVertexFitter();
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~MultiVertexFitter() {}
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//--------------------------------------------------------------------------------------------
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// Fundamental funtions
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//--------------------------------------------------------------------------------------------
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void init (double bfield = 3.8);
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void setChisqMax (const float chisqmx);
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//--------------------------------------------------------------------------------------------
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// CMS parameter ordering for the vector/matrix, which is assumed here:
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//
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// qoverp, cotTheta, phi0, d0, z0;
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// mapping to CDF is therefore { 1, 0*, 4, 3, 2 }
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//
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// Note that the radius of curvature (in cm) is then:
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//
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// Rc = cos(theta) / [ 0.0029979.... * (q/p) * B ],
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//
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// where B is the magnetic field in Tesla and tht is the angle between the field and the
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// direction. With p * cos(theta) = pT it follows:
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//
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// Rc = pT / [ 0.0029979.... * q * B ],
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// fullCurvature = 1 / Rc = 0.0029979 * q * B / pT = - 0.0029979 * B / pT.
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//
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//--------------------------------------------------------------------------------------------
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//--------------------------------------------------------------------------------------------
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// Parameter ordering for the vector/matrix, assumed here:
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//
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// cotTheta, curvature, z0, d0, phi0;
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//
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// And also: curvature = -0.5 * CurvConst * BFieldT / pT (strictly speaking: half curvature)
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// CurvConst = 0.0029979, BField in Tesla
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//
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// Incidentally this is the ordering used in the CDF experiment.
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//--------------------------------------------------------------------------------------------
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bool addTrack (const HepVector &pars, const HepSymMatrix &cov, int trackid,
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float mass, vertexNumber jv);
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bool addTrack (const TVectorD &pars, const TMatrixDSym &cov, int trackid,
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double mass, vertexNumber jv);
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bool vertexPoint_2d (vertexNumber jv1, vertexNumber jv2);
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bool vertexPoint_3d (vertexNumber jv1, vertexNumber jv2);
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bool vertexPoint_1track (vertexNumber jv1, vertexNumber jv2);
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bool vertexPoint_0track (vertexNumber jv1, vertexNumber jv2);
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bool conversion_2d (vertexNumber jv);
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bool conversion_3d (vertexNumber jv);
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bool massConstrain (int ntrk, const int trkIds[], float mass);
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void setPrimaryVertex (float xv, float yv, float zv);
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void setPrimaryVertex (Hep3Vector pv);
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bool setPrimaryVertexError(const HepSymMatrix &xverr);
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void setPrimaryVertexError(const float xverr[3][3]);
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bool fit ();
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void print (std::ostream& os) const;
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void print () const;
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void printErr (std::ostream& os) const;
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void printErr () const;
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void restoreFromCommons ();
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// -------------------------------------------------------------------------------------------
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// Turn ON this option only when fitting the primary with no additional constraints.
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// The routineis protected and will not function if those options are selected as well as the
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// beamline constraint. In case this option is chosen the fit will calculate a result also
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// with just one track in input.
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//
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// In order to enable this option the user must do the following: Fit the primary vertex as
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// VERTEX_1 (without any other vertices). Enable beamlineConstraint by setting the pointing
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// constraint variable vtxpnt[0][0] to -100 (no pointing constraints when <0) Note that index
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// 0,0 corresponds to index 1,1 in fortran Provide the beamline parameters:
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//
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// --> assume xv = xb + xzbslope*z,
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// yv = yb + yzbslope*z, where (xv, yv) is the transverse
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// beam position at z, (xb, yb) is the transverse beam position at z = 0
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// and (xzbslope, yzbslope) are the slopes of the beamline
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// --> set primary vertex at z=0 (xb, yb, 0)
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// --> set the diagonal elements of the primary vertex error matrix to the
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// sigma**2 of beam spread in x, y and z:
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// xverr[1][1] = (~30 - 50 um)**2
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// xverr[2][2] = (~30 - 50 um)**2
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// xverr[3][3] = (~30 cm) **2
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// All other elements should be 0
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// For help email: Joao Guimaraes guima@huhepl.harvard.edu, Franco Bedeschi bed@fnal.gov
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// See more information in the ctvmft.f
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// -------------------------------------------------------------------------------------------
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bool beamlineConstraint(float xb, float yb, HepSymMatrix berr,float xzbslope,float yzbslope);
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bool beamlineConstraint(Hep3Vector pv, HepSymMatrix berr, float xzbslope, float yzbslope);
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//--------------------------------------------------------------------------------------------
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// Accessors
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//--------------------------------------------------------------------------------------------
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void setBField (double bField) { _bField = bField; }
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double bField () const { return _bField; }
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void setExcuse ();
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void setNoExcuse();
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std::string expert () const; // name/email of MultiVertexFitter expert
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int status () const; // return status of fit
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// overall fit quality paramters
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int ndof () const; // number of degrees of freedom
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float prob () const; // return probability of chi-square
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float chisq () const; // return chi-square of fit
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float chisq (const int trkId) const;
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float chisq_rphi () const;
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float chisq_rphi (const int trkId) const;
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float chisq_z () const;
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float chisq_z (const int trkId) const;
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float chisq_rphiz() const;
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float chisq_rphiz(const int trkId) const;
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// return fit track four momentum
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//HepLorentzVector getTrackP4 (const int trkId) const;
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FourVector getTrackP4 (const int trkId) const;
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//// return fit track parameters
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//Helix getHelix (const int trkId) const;
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// return fit mass and get error
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float getMass (int ntrk, const int trkIds[], float& dmass) const;
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// return decay length
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float getDecayLength(vertexNumber nv, vertexNumber mv, const Hep3Vector& dir,
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float& dlerr) const;
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float get_dr(vertexNumber nv, vertexNumber mv, float& drerr) const;
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float get_dz(vertexNumber nv, vertexNumber mv, float& dzerr) const;
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// return location of vertex
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Hep3Vector getVertexHep(vertexNumber nv) const;
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ThreeVector getVertex(vertexNumber nv) const;
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// return error matrix element.
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ThreeSymMatrix getErrorMatrix(vertexNumber nv) const;
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double getErrorMatrixHep(int j, int k) const;
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HepSymMatrix getErrorMatrixHep(vertexNumber nv) const;
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HepSymMatrix getErrorMatrixHep(const int trkId) const;
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void getPosMomErr (HepMatrix& errors) const;
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int vOff (vertexNumber jv) const;
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int tOff (const int trkId) const;
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int pOff (int lp) const;
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int cOff (int lc) const;
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int mOff () const;
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double VMat (int i, int j) const;
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float getPtError (const int trkId) const;
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MultiVertexFitter::vertexNumber
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allocateVertexNumber();
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void resetAllocatedVertexNumber();
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// Accessors for getting information relative to ijk errors Get the error code from the three ijk
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// indexes into the argument variables
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void getIJKErr(int& err0, int& err1, int& err2) const;
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// Return each error code from the three ijk indexes
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int getIJKErr0() const;
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int getIJKErr1() const;
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int getIJKErr2() const;
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// Get the track-id of the track causing a fatal error as indicated by the corresponding ijk error
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int getErrTrackId() const;
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// Set new track reference point
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void setTrackReferencePoint(const ThreeVector &ref);
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//--------------------------------------------------------------------------------------------
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// Overload operators
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//--------------------------------------------------------------------------------------------
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friend std::ostream& operator << (std::ostream& os, const MultiVertexFitter& vfit);
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protected:
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std::string _expert; // string: name and email of MultiVertexFitter expert
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int _stat; // status returned from fit.
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static const int _maxvtx = CTVMFT_MAXVTX; // 6; // Maximum number of vertices
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static const int _maxmcn = CTVMFT_MAXMCN; // 4; // Maximum number of mass constraints
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static const int _maxtrk = CTVMFT_MAXTRK; // 50; // Maximum number of tracks
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static const int _maxitr = CTVMFT_MAXITR; // 10; // Maximum number of iteration steps
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static const int _maxdim = 5*(CTVMFT_MAXVTX+1)+3*CTVMFT_MAXTRK+CTVMFT_MAXMCN;
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// FIDDLE must have access to MultiVertexFitter's (other) protected data like _maxvtx, etc. It
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// must therefore be a friend.
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struct FIDDLE;
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friend struct FIDDLE;
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struct FIDDLE {
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int excuse;
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float chisqmax;
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};
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// CTVMQ must have access to MultiVertexFitter's (other) protected data like _maxvtx, etc. It
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// must therefore be a friend.
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struct CTVMQ;
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friend struct CTVMQ;
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struct CTVMQ {
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int runnum;
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int trgnum;
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int iter;
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int ntscut;
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int nvertx;
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int nmassc;
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int ntrack;
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int trkvtx[_maxvtx][_maxtrk]; // Logical in FORTRAN, but integer here to get the size
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int trkmcn[_maxmcn][_maxtrk]; // Logical in FORTRAN, but integer here to get the size
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int vtxpnt[2][_maxvtx];
|
| 313 |
|
|
float cmass [_maxmcn];
|
| 314 |
|
|
int cvtx [_maxvtx];
|
| 315 |
|
|
int vtxvtx[_maxvtx][_maxvtx]; // Logical in FORTRAN, but integer here to get the size
|
| 316 |
|
|
char tkbank[_maxtrk][4];
|
| 317 |
|
|
int list [_maxtrk];
|
| 318 |
|
|
float tmass [_maxtrk];
|
| 319 |
|
|
int matdim;
|
| 320 |
|
|
int tkerr [_maxtrk];
|
| 321 |
|
|
int ndof;
|
| 322 |
|
|
float chisqr[_maxitr+1];
|
| 323 |
|
|
float chit [_maxtrk];
|
| 324 |
|
|
float chiv [_maxvtx+1];
|
| 325 |
|
|
float chim [_maxmcn];
|
| 326 |
|
|
float xyzpv0[3];
|
| 327 |
|
|
float exyzpv[3][3];
|
| 328 |
|
|
float xzslope;
|
| 329 |
|
|
float yzslope;
|
| 330 |
|
|
float xyzvrt[_maxvtx+1][3];
|
| 331 |
|
|
float dxyzpv[3];
|
| 332 |
|
|
float par [_maxtrk][5];
|
| 333 |
|
|
float g [_maxtrk][5][5];
|
| 334 |
|
|
float trkp4 [6][_maxtrk];
|
| 335 |
|
|
float vtxp4 [_maxvtx][4];
|
| 336 |
|
|
float mcnp4 [_maxmcn][4];
|
| 337 |
|
|
float dda [8][_maxtrk];
|
| 338 |
|
|
int voff [_maxvtx];
|
| 339 |
|
|
int toff [_maxtrk];
|
| 340 |
|
|
int poff [_maxvtx];
|
| 341 |
|
|
int coff [_maxvtx];
|
| 342 |
|
|
int moff;
|
| 343 |
|
|
float par0 [_maxtrk][5];
|
| 344 |
|
|
float pardif[_maxtrk][5];
|
| 345 |
|
|
float fmcdif[_maxmcn];
|
| 346 |
|
|
float pcon [2][_maxvtx];
|
| 347 |
|
|
float sang [2][_maxvtx];
|
| 348 |
|
|
float drmax;
|
| 349 |
|
|
float rvmax;
|
| 350 |
|
|
float dzmax;
|
| 351 |
|
|
float trnmax;
|
| 352 |
|
|
float dsmin;
|
| 353 |
|
|
int ijkerr[3];
|
| 354 |
|
|
float pscale;
|
| 355 |
|
|
};
|
| 356 |
|
|
|
| 357 |
|
|
// CTVMFR must have access to MultiVertexFitter's (other) protected data like _maxdim, etc.
|
| 358 |
|
|
// It must therefore be a friend.
|
| 359 |
|
|
struct CTVMFR;
|
| 360 |
|
|
friend struct CTVMFR;
|
| 361 |
|
|
struct CTVMFR {
|
| 362 |
|
|
double vmat[_maxdim+1][_maxdim];
|
| 363 |
|
|
};
|
| 364 |
|
|
|
| 365 |
|
|
// TRKPRM must have access to MultiVertexFitter's (other) protected data like _maxtrk, etc.
|
| 366 |
|
|
// It must therefore be a friend.
|
| 367 |
|
|
struct TRKPRM;
|
| 368 |
|
|
friend struct TRKPRM;
|
| 369 |
|
|
struct TRKPRM {
|
| 370 |
|
|
float trhelix[_maxtrk][5];
|
| 371 |
|
|
float trem [_maxtrk][5][5];
|
| 372 |
|
|
};
|
| 373 |
|
|
|
| 374 |
|
|
CTVMQ _ctvmq;
|
| 375 |
|
|
CTVMQ* _ctvmq_com;
|
| 376 |
|
|
CTVMFR _ctvmfr;
|
| 377 |
|
|
CTVMFR* _ctvmfr_com;
|
| 378 |
|
|
FIDDLE _fiddle;
|
| 379 |
|
|
FIDDLE* _fiddle_com;
|
| 380 |
|
|
TRKPRM _trkprm;
|
| 381 |
|
|
TRKPRM* _trkprm_com;
|
| 382 |
|
|
|
| 383 |
|
|
//--------------------------------------------------------------------------------------------
|
| 384 |
|
|
// Private functions used by class
|
| 385 |
|
|
//--------------------------------------------------------------------------------------------
|
| 386 |
|
|
|
| 387 |
|
|
private:
|
| 388 |
|
|
|
| 389 |
|
|
// Moves reference point of track parameters and errors to _referencePoint
|
| 390 |
|
|
//void moveReferencePoint(HepVector &v, HepSymMatrix &m);
|
| 391 |
|
|
// Moves reference point of track parameters and errors to _referencePoint. Additionally
|
| 392 |
|
|
//checks if track has already been moved by examining it's "derived" link
|
| 393 |
|
|
//void moveReferencePoint(const CdfTrack *trk, HepVector &v, HepSymMatrix &m);
|
| 394 |
|
|
|
| 395 |
|
|
//--------------------------------------------------------------------------------------------
|
| 396 |
|
|
// Data members of class
|
| 397 |
|
|
//--------------------------------------------------------------------------------------------
|
| 398 |
|
|
double _bField; // B field in Tesla
|
| 399 |
|
|
|
| 400 |
|
|
int _currentAllocatedVertexNumber; //index to enum vertexNumber
|
| 401 |
|
|
ThreeVector _referencePoint; //reference point of track
|
| 402 |
|
|
Hep3Vector _primaryVertex; //primary vertex relative to "referencePoint"
|
| 403 |
|
|
Hep3Vector _cdfPrimaryVertex; //primary vertex in CDF coordinate system
|
| 404 |
|
|
bool _extrapolateTrackErrors; //extrapolate track errors to point _referencePoint
|
| 405 |
|
|
};
|
| 406 |
|
|
}
|
| 407 |
|
|
|
| 408 |
|
|
//--------------------------------------------------------------------------------------------------
|
| 409 |
|
|
// Inline functions
|
| 410 |
|
|
//--------------------------------------------------------------------------------------------------
|
| 411 |
|
|
inline
|
| 412 |
|
|
std::ostream& operator << (std::ostream& os, const mithep::MultiVertexFitter& vfit)
|
| 413 |
|
|
{
|
| 414 |
|
|
vfit.print(os);
|
| 415 |
|
|
return (os);
|
| 416 |
|
|
}
|
| 417 |
|
|
inline
|
| 418 |
|
|
void mithep::MultiVertexFitter::setExcuse()
|
| 419 |
|
|
{
|
| 420 |
|
|
_fiddle.excuse = 1; // the default
|
| 421 |
|
|
}
|
| 422 |
|
|
inline
|
| 423 |
|
|
void mithep::MultiVertexFitter::setNoExcuse()
|
| 424 |
|
|
{
|
| 425 |
|
|
_fiddle.excuse = 0; // crash on input error
|
| 426 |
|
|
}
|
| 427 |
|
|
inline
|
| 428 |
|
|
void mithep::MultiVertexFitter::setChisqMax(const float chisqmx)
|
| 429 |
|
|
{
|
| 430 |
|
|
_fiddle.chisqmax = chisqmx;
|
| 431 |
|
|
}
|
| 432 |
|
|
#endif
|
