Namespaces
	Dynamics

	EvtGen

	HelicityFormalism

Classes
class	IntegrationSample

class	IntensityBuilderXML

class	ParticleStateTransitionKinematicsInfo

class	SubSystem
	Definition of a two-body decay node within a sequential decay tree. More...

struct	TwoBodyDecayInfo

Functions
TwoBodyDecayInfo	extractDecayInfo (const boost::property_tree::ptree &pt)

void	updateDataContainerState (ComPWA::FunctionTree::ParameterList &DataSample, const Kinematics &Kinematics)

void	updateDataContainerContent (ComPWA::FunctionTree::ParameterList &DataList, const EventCollection &DataSample, const Kinematics &Kinematics)

FourMomentum	createFourMomentum (const boost::property_tree::ptree &pt)

ParticleStateTransitionKinematicsInfo	createKinematicsInfo (const ComPWA::ParticleList &PartList, const boost::property_tree::ptree &pt)

HelicityKinematics	createHelicityKinematics (const std::string XmlFile)
	Create HelicityKinematics object from an XML file that contains both a kinematics section and a particle section. More...

HelicityKinematics	createHelicityKinematics (const ComPWA::ParticleList &PartList, const std::string XmlFile)
	Create HelicityKinematics object from an XML file with a kinematics section and provide a particle list separately. More...

HelicityKinematics	createHelicityKinematics (const ComPWA::ParticleList &ParticleList, const boost::property_tree::ptree &ptree)

std::ostream &	operator<< (std::ostream &outstream, const ParticleStateTransitionKinematicsInfo &kininfo)

std::pair< double, double >	SRange (double s, std::vector< double > &masses)

std::pair< double, double >	PhspVolume (double s, std::vector< double > &FSMasses, std::size_t SampleSize=1000)
	Compute phasespace volume of momentum space for an arbitrary number of particles in the final state using Riemann integration. More...

double	PhspVolumeTwoParticles (double s, double m1, double m2)
	Phase space element for a two particle decay. More...

double	KallenFunction (double x, double y, double z)
	Original Källén function, that is, not having square values in its argument. More...

std::ostream &	operator<< (std::ostream &stream, const SubSystem &s)

std::vector< unsigned int >	stringToVectInt (std::string str)
	Helper funtions to transfor a string of space-separated numbers to a vector<unsigned int>. More...

Function Documentation

◆ createFourMomentum()

FourMomentum ComPWA::Physics::createFourMomentum ( const boost::property_tree::ptree & pt )

Definition at line 965 of file BuilderXML.cpp.

◆ createHelicityKinematics() [1/3]

HelicityFormalism::HelicityKinematics ComPWA::Physics::createHelicityKinematics ( const std::string XmlFile )

Create HelicityKinematics object from an XML file that contains both a kinematics section and a particle section.

Definition at line 1046 of file BuilderXML.cpp.

◆ createHelicityKinematics() [2/3]

HelicityFormalism::HelicityKinematics ComPWA::Physics::createHelicityKinematics	(	const ComPWA::ParticleList &	PartList,
		const std::string	XmlFile
	)

Create HelicityKinematics object from an XML file with a kinematics section and provide a particle list separately.

Definition at line 1052 of file BuilderXML.cpp.

◆ createHelicityKinematics() [3/3]

HelicityFormalism::HelicityKinematics ComPWA::Physics::createHelicityKinematics	(	const ComPWA::ParticleList &	ParticleList,
		const boost::property_tree::ptree &	ptree
	)

Definition at line 1066 of file BuilderXML.cpp.

◆ createKinematicsInfo()

ParticleStateTransitionKinematicsInfo ComPWA::Physics::createKinematicsInfo	(	const ComPWA::ParticleList &	PartList,
		const boost::property_tree::ptree &	pt
	)

Definition at line 1000 of file BuilderXML.cpp.

◆ extractDecayInfo()

TwoBodyDecayInfo ComPWA::Physics::extractDecayInfo ( const boost::property_tree::ptree & pt )

Definition at line 609 of file BuilderXML.cpp.

◆ KallenFunction()

double ComPWA::Physics::KallenFunction	(	double	x,
		double	y,
		double	z
	)

Original Källén function, that is, not having square values in its argument.

We use this function instead of the one that can be factorised (see Heron's formula), because we need to enter $s$ without taking its square root.

Definition at line 81 of file PhspVolume.cpp.

◆ operator<<() [1/2]

std::ostream& ComPWA::Physics::operator<<	(	std::ostream &	stream,
		const SubSystem &	s
	)

Definition at line 23 of file SubSystem.cpp.

◆ operator<<() [2/2]

std::ostream& ComPWA::Physics::operator<<	(	std::ostream &	outstream,
		const ParticleStateTransitionKinematicsInfo &	kininfo
	)

Definition at line 129 of file ParticleStateTransitionKinematicsInfo.cpp.

◆ PhspVolume()

std::pair< double, double > ComPWA::Physics::PhspVolume	(	double	s,
		std::vector< double > &	FSMasses,
		std::size_t	SampleSize = `1000`
	)

Compute phasespace volume of momentum space for an arbitrary number of particles in the final state using Riemann integration.

Returns: A pair: first value is the volume, second is the error (currently set to 0.)

Todo:

Implement errors (second member of the pair).

Algorithm might be improved with Simpson's rule, because we integrate over a function that is polynomial in the limit $m_i\rightarrow 0$

Todo:: Better to reuse this sample per recursion. Now it is regenerated for each iteration.

Definition at line 42 of file PhspVolume.cpp.

◆ PhspVolumeTwoParticles()

double ComPWA::Physics::PhspVolumeTwoParticles	(	double	s,
		double	m1,
		double	m2
	)

Phase space element for a two particle decay.

An analytic solution exists only for the volume of the phasespace of two-particle decays.

Definition at line 77 of file PhspVolume.cpp.

◆ SRange()

std::pair<double, double> ComPWA::Physics::SRange	(	double	s,
		std::vector< double > &	masses
	)

Definition at line 30 of file PhspVolume.cpp.

◆ stringToVectInt()

std::vector<unsigned int> ComPWA::Physics::stringToVectInt ( std::string str )

inline

Helper funtions to transfor a string of space-separated numbers to a vector<unsigned int>.

E.g. "1 2 3" =? vector<unsigned int>({1,2,3})

Definition at line 54 of file SubSystem.hpp.

◆ updateDataContainerContent()

void ComPWA::Physics::updateDataContainerContent	(	ComPWA::FunctionTree::ParameterList &	DataList,
		const EventCollection &	DataSample,
		const Kinematics &	Kinematics
	)

Definition at line 898 of file BuilderXML.cpp.

◆ updateDataContainerState()

void ComPWA::Physics::updateDataContainerState	(	ComPWA::FunctionTree::ParameterList &	DataSample,
		const Kinematics &	Kinematics
	)

Definition at line 869 of file BuilderXML.cpp.

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Classes

Functions