HelicityVariables.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
#include <analysis/VariableManager/Manager.h>
 
#include <vector>
#include <string>
 
namespace Belle2 {
  class Particle;
 
  namespace Variable {

    double cosHelicityAngleMomentum(const Particle* part);

    double cosHelicityAngleMomentumPi0Dalitz(const Particle* part);

    double cosHelicityAngleBeamMomentum(const Particle* mother, const std::vector<double>& index);

    double cosHelicityAngle(const Particle* mother, const std::vector<double>& indices);

    double cosAcoplanarityAngle(const Particle* mother, const std::vector<double>& granddaughters);

    double cosHelicityAnglePrimary(const Particle* part);

    double cosHelicityAngleDaughter(const Particle* part, const std::vector<double>& indices);

    double acoplanarityAngle(const Particle* part);

    double cosHelicityAngleForQuasiTwoBodyDecay(const Particle* mother, const std::vector<double>& indices);

    Manager::FunctionPtr momentaTripleProduct(const std::vector<std::string>& arguments);
 
  }
} // Belle2 namespace