Belle II Software light-2406-ragdoll
PCmsLabTransform.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 <mdst/dbobjects/CollisionBoostVector.h>
12#include <mdst/dbobjects/CollisionInvariantMass.h>
13#include <mdst/dbobjects/CollisionAxisCMS.h>
14#include <framework/database/DBObjPtr.h>
15#include <framework/geometry/B2Vector3.h>
16#include <framework/utilities/LabToCms.h>
17
18#include <Math/LorentzRotation.h>
19#include <Math/Vector4D.h>
20
21namespace Belle2 {
31
32 public:
33
38
43 {
44 return m_boostVectorDB->getBoost();
45 }
46
50 double getCMSEnergy() const
51 {
52 return m_invariantMassDB->getMass();
53 }
54
58 ROOT::Math::PxPyPzEVector getBeamFourMomentum() const
59 {
60 return rotateCmsToLab() * ROOT::Math::PxPyPzEVector(0, 0, 0, getCMSEnergy());
61 }
62
67 const ROOT::Math::LorentzRotation rotateLabToCms() const
68 {
69 return LabToCms::rotateLabToCms(getBoostVector(), m_axisCmsDB->getAngleXZ(), m_axisCmsDB->getAngleYZ());
70 }
71
76 const ROOT::Math::LorentzRotation rotateCmsToLab() const
77 {
78 return rotateLabToCms().Inverse();
79 }
80
86 static ROOT::Math::PxPyPzMVector labToCms(const ROOT::Math::PxPyPzMVector& vec);
87
93 static ROOT::Math::PxPyPzMVector cmsToLab(const ROOT::Math::PxPyPzMVector& vec);
94
100 static ROOT::Math::PxPyPzEVector labToCms(const ROOT::Math::PxPyPzEVector& vec);
101
107 static ROOT::Math::PxPyPzEVector cmsToLab(const ROOT::Math::PxPyPzEVector& vec);
108
109 private:
113 };
114
116} // Belle2 namespace
117
118
119
120
Class for accessing objects in the database.
Definition: DBObjPtr.h:21
static ROOT::Math::LorentzRotation rotateLabToCms(const ROOT::Math::XYZVector &boostVector, double cmsAngleXZ, double cmsAngleYZ)
Function takes 3D boostVector and angles of the HER momentum in the CM system obtained by pure boost.
Definition: LabToCms.h:43
Class to hold Lorentz transformations from/to CMS and boost vector.
ROOT::Math::PxPyPzEVector getBeamFourMomentum() const
Returns LAB four-momentum of e+e-, i.e.
double getCMSEnergy() const
Returns CMS energy of e+e- (aka.
static ROOT::Math::PxPyPzMVector labToCms(const ROOT::Math::PxPyPzMVector &vec)
Transforms Lorentz vector into CM System.
const ROOT::Math::LorentzRotation rotateLabToCms() const
Returns Lorentz transformation from Lab to CMS.
PCmsLabTransform()
Constructor.
static ROOT::Math::PxPyPzMVector cmsToLab(const ROOT::Math::PxPyPzMVector &vec)
Transforms Lorentz vector into Laboratory System.
const DBObjPtr< CollisionBoostVector > m_boostVectorDB
db object for boost vector.
const ROOT::Math::LorentzRotation rotateCmsToLab() const
Returns Lorentz transformation from CMS to Lab.
const DBObjPtr< CollisionInvariantMass > m_invariantMassDB
db object for invariant mass.
B2Vector3D getBoostVector() const
Returns boost vector (beta=p/E)
const DBObjPtr< CollisionAxisCMS > m_axisCmsDB
db object for collision axis in CM system from boost.
Abstract base class for different kinds of events.
Definition: ClusterUtils.h:24