Belle II Software  light-2212-foldex
HelicityVariables.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 <vector>
12 
13 namespace Belle2 {
18  class Particle;
19 
20  namespace Variable {
21 
29  double cosHelicityAngleMomentum(const Particle* part);
30 
36  double cosHelicityAngleMomentumPi0Dalitz(const Particle* part);
37 
43  double cosHelicityAngleBeamMomentum(const Particle* mother, const std::vector<double>& index);
44 
53  double cosHelicityAngle(const Particle* mother, const std::vector<double>& indices);
54 
64  double cosAcoplanarityAngle(const Particle* mother, const std::vector<double>& granddaughters);
65 
69  double cosHelicityAnglePrimary(const Particle* part);
70 
75  double cosHelicityAngleDaughter(const Particle* part, const std::vector<double>& indices);
76 
80  double acoplanarityAngle(const Particle* part);
81 
88  double cosHelicityAngleForQuasiTwoBodyDecay(const Particle* mother, const std::vector<double>& indices);
89 
90  }
92 } // Belle2 namespace
Abstract base class for different kinds of events.
Definition: ClusterUtils.h:23