Belle II Software development
DistanceTools.h
1/**************************************************************************
2 * basf2 (Belle II Analysis Software Framework) *
3 * Author: The Belle II Collaboration *
4 * *
5 * See git log for contributors and copyright holders. *
6 * This file is licensed under LGPL-3.0, see LICENSE.md. *
7 **************************************************************************/
8
9#pragma once
10
11#include "TMatrixDSym.h"
12#include <Math/Vector3D.h>
13
14namespace Belle2 {
19
26 namespace DistanceTools {
27
31 ROOT::Math::XYZVector poca(ROOT::Math::XYZVector const& trackPos, ROOT::Math::XYZVector const& trackP,
32 ROOT::Math::XYZVector const& vtxPos);
33
37 ROOT::Math::XYZVector trackToVtxVec(ROOT::Math::XYZVector const& trackPos, ROOT::Math::XYZVector const& trackP,
38 ROOT::Math::XYZVector const& vtxPos);
39
43 double trackToVtxDist(ROOT::Math::XYZVector const& trackPos, ROOT::Math::XYZVector const& trackP,
44 ROOT::Math::XYZVector const& vtxPos);
45
50 TMatrixDSym trackToVtxCovmat(ROOT::Math::XYZVector const& trackP,
51 TMatrixDSym const& trackPosCovMat, TMatrixDSym const& vtxPosCovMat);
52
57 double trackToVtxDistErr(ROOT::Math::XYZVector const& trackPos, ROOT::Math::XYZVector const& trackP,
58 ROOT::Math::XYZVector const& vtxPos,
59 TMatrixDSym const& trackPosCovMat, TMatrixDSym const& vtxPosCovMat);
60
61
65 ROOT::Math::XYZVector vtxToVtxVec(ROOT::Math::XYZVector const& vtx1Pos, ROOT::Math::XYZVector const& vtx2Pos);
66
70 double vtxToVtxDist(ROOT::Math::XYZVector const& vtx1Pos, ROOT::Math::XYZVector const& vtx2Pos);
71
75 TMatrixDSym vtxToVtxCovMat(TMatrixDSym const& vtx1CovMat, TMatrixDSym const& vtx2CovMat);
76
80 double vtxToVtxDistErr(ROOT::Math::XYZVector const& vtx1Pos, ROOT::Math::XYZVector const& vtx2Pos,
81 TMatrixDSym const& vtx1CovMat, TMatrixDSym const& vtx2CovMat);
82 }
83
84}
This namespace contains a collection of function that are useful to compute distances between tracks ...
ROOT::Math::XYZVector trackToVtxVec(ROOT::Math::XYZVector const &trackPos, ROOT::Math::XYZVector const &trackP, ROOT::Math::XYZVector const &vtxPos)
Returns the 3D vector between a vertex and a track's point of closest approach to that vertex.
TMatrixDSym vtxToVtxCovMat(TMatrixDSym const &vtx1CovMat, TMatrixDSym const &vtx2CovMat)
Returns the covariance (error) matrix related to the vector linking two vertices.
double trackToVtxDist(ROOT::Math::XYZVector const &trackPos, ROOT::Math::XYZVector const &trackP, ROOT::Math::XYZVector const &vtxPos)
Returns the distance between a vertex and a track's point of closest approach to that vertex.
double vtxToVtxDistErr(ROOT::Math::XYZVector const &vtx1Pos, ROOT::Math::XYZVector const &vtx2Pos, TMatrixDSym const &vtx1CovMat, TMatrixDSym const &vtx2CovMat)
Returns the estimated uncertainty on the distance between two vertices.
TMatrixDSym trackToVtxCovmat(ROOT::Math::XYZVector const &trackP, TMatrixDSym const &trackPosCovMat, TMatrixDSym const &vtxPosCovMat)
Returns the covariance (error) matrix of the 3D vector between a vertex and a track's point of closes...
double vtxToVtxDist(ROOT::Math::XYZVector const &vtx1Pos, ROOT::Math::XYZVector const &vtx2Pos)
Returns the distance between two vertices.
ROOT::Math::XYZVector poca(ROOT::Math::XYZVector const &trackPos, ROOT::Math::XYZVector const &trackP, ROOT::Math::XYZVector const &vtxPos)
Returns the Point Of Closest Approach of a track to a vertex.
ROOT::Math::XYZVector vtxToVtxVec(ROOT::Math::XYZVector const &vtx1Pos, ROOT::Math::XYZVector const &vtx2Pos)
Returns the 3D vector between two vertices, ie vtxPos2 - vtxPos1.
double trackToVtxDistErr(ROOT::Math::XYZVector const &trackPos, ROOT::Math::XYZVector const &trackP, ROOT::Math::XYZVector const &vtxPos, TMatrixDSym const &trackPosCovMat, TMatrixDSym const &vtxPosCovMat)
Returns the estimated uncertainty between a vertex and a track's point of closest approach to that ve...
Abstract base class for different kinds of events.