Provide some static functions to calculate kinematic variables. More...

#include "NAGASH/Kinematics.h"

Inheritance diagram for NAGASH::Kinematics:

Public Member Functions
	Kinematics (std::shared_ptr< MSGTool > MSG)

Static Public Member Functions
static double	CosthStar (const TLorentzVector &Lepton, const TLorentzVector &AntiLepton)
	Calculate the Collins-Soper angle of a two-particle-system.

static double	DeltaPhi (double, double)
	Calculate the \(\Delta\phi\) between two angles.

static double	DeltaR (double, double, double, double)
	Calculate the \(\Delta R\) between two particles.

static std::vector< double >	GetAiPolynominals (double costh, double phi)
	Calculate angular terms corresponding to each angular coefficient.

static void	GetAiPolynominals (double costh, double phi, std::vector< double > &aipols)
	Calculate angular terms corresponding to each angular coefficient.

static void	GetBDFAngles (const TLorentzVector &tlv1, const int &charge1, const TLorentzVector &tlv2, double &costh, double &phi)
	Calculate the decay angles in the Beam Direction Frame.

static void	GetCSFAngles (const TLorentzVector &lep1, const int &charge1, const TLorentzVector &lep2, double ebeam, double &costh, double &phi)
	Calculate the decay angles in the Collins-Soper Frame.

static void	GetProjections (const TLorentzVector &proj, const TLorentzVector &axis, double &par, double &perp)
	Get the parallel and perpendicular components of a vector corresponding to an axis.

static void	GetVHFAngles (const TLorentzVector &lep1, const int &charge1, const TLorentzVector &lep2, double &costh, double &phi)
	Calculate the decay angles in the Vector Boson Helicity Frame.

static double	MT (const TLorentzVector &l1, const TLorentzVector &l2)
	Calculate the transverse momentum of a two-particle-system.

static double	SumAiPolynominals (std::vector< double > &ai, std::vector< double > &aimom)
	Calculate the angular polynomials.

Additional Inherited Members
Protected Member Functions inherited from NAGASH::Tool
	Tool ()=delete

	Tool (const Tool &tool)=delete

	Tool (std::shared_ptr< MSGTool > MSG)
	Constructor.

	Tool (Tool &&tool)=delete

virtual	~Tool ()=default

std::shared_ptr< MSGTool >	MSGUser ()
	return the MSGTool inside.

Tool &	operator= (const Tool &tool)=delete

Tool &	operator= (Tool &&tool)=delete

Detailed Description

Provide some static functions to calculate kinematic variables.

Definition at line 16 of file Kinematics.h.

Constructor & Destructor Documentation

◆ Kinematics()

NAGASH::Kinematics::Kinematics ( std::shared_ptr< MSGTool > MSG )

inline

Definition at line 19 of file Kinematics.h.

Member Function Documentation

◆ CosthStar()

double NAGASH::Kinematics::CosthStar	(	const TLorentzVector &	Lepton,
		const TLorentzVector &	AntiLepton
	)

inlinestatic

Calculate the Collins-Soper angle of a two-particle-system.

Parameters

Lepton	four-vector of the lepton.
AntiLepton	four-vector of the anti-lepton.

Returns: the cosine value of the angle.

Definition at line 50 of file Kinematics.h.

◆ DeltaPhi()

double NAGASH::Kinematics::DeltaPhi	(	double	phi1,
		double	phi2
	)

inlinestatic

Calculate the \(\Delta\phi\) between two angles.

Parameters

phi1	angle 1.
phi2	angle 2.

Returns: the \(\Delta\phi\) between two them, in the range between \([-\pi,\pi]\).

Definition at line 107 of file Kinematics.h.

◆ DeltaR()

double NAGASH::Kinematics::DeltaR	(	double	eta1,
		double	phi1,
		double	eta2,
		double	phi2
	)

inlinestatic

Calculate the \(\Delta R\) between two particles.

Parameters

eta1	the \(\eta\) of the first particle.
phi1	the \(\phi\) of the first particle.
eta2	the \(\eta\) of the second particle.
phi2	the \(\phi\) of the second particle.

Returns: \(\Delta R\) value.

Definition at line 98 of file Kinematics.h.

◆ GetAiPolynominals() [1/2]

std::vector< double > Kinematics::GetAiPolynominals	(	double	costh,
		double	phi
	)

static

Calculate angular terms corresponding to each angular coefficient.

Parameters

[in]	costh	Cosine value of the decay angle.
[in]	phi	Phi value of the decay angle.

Returns: aipols Output terms in the form of a vector.

Definition at line 119 of file Kinematics.cxx.

◆ GetAiPolynominals() [2/2]

void Kinematics::GetAiPolynominals	(	double	costh,
		double	phi,
		std::vector< double > &	aipols
	)

static

Calculate angular terms corresponding to each angular coefficient.

Parameters

[in]	costh	Cosine value of the decay angle.
[in]	phi	Phi value of the decay angle.
[out]	aipols	Output terms in the form of a vector.

Definition at line 91 of file Kinematics.cxx.

◆ GetBDFAngles()

void Kinematics::GetBDFAngles	(	const TLorentzVector &	lep1,
		const int &	charge1,
		const TLorentzVector &	lep2,
		double &	costh,
		double &	phi
	)

static

Calculate the decay angles in the Beam Direction Frame.

Parameters

[in]	lep1	four-vector of lepton one.
[in]	charge1	charge of lepton one.
[in]	lep2	four-vector of lepton two.
[out]	costh	\(\cos\theta_{BD}\).
[out]	phi	\(\phi_{BD}\).

Definition at line 56 of file Kinematics.cxx.

◆ GetCSFAngles()

void Kinematics::GetCSFAngles	(	const TLorentzVector &	lep1,
		const int &	charge1,
		const TLorentzVector &	lep2,
		double	ebeam,
		double &	costh,
		double &	phi
	)

static

Calculate the decay angles in the Collins-Soper Frame.

Parameters

[in]	lep1	four-vector of lepton one.
[in]	charge1	charge of lepton one.
[in]	lep2	four-vector of lepton two.
[in]	ebeam	energy of the beam.
[out]	costh	\(\cos\theta_{CS}\).
[out]	phi	\(\phi_{CS}\).

Definition at line 13 of file Kinematics.cxx.

◆ GetProjections()

void NAGASH::Kinematics::GetProjections	(	const TLorentzVector &	proj,
		const TLorentzVector &	axis,
		double &	par,
		double &	perp
	)

inlinestatic

Get the parallel and perpendicular components of a vector corresponding to an axis.

Parameters

[in]	proj	the vector to be projected.
[in]	axis	the axis.
[out]	par	the parallel component of the vector.
[out]	perp	the perpendicular component of the vector.

Definition at line 70 of file Kinematics.h.

◆ GetVHFAngles()

void Kinematics::GetVHFAngles	(	const TLorentzVector &	lep1,
		const int &	charge1,
		const TLorentzVector &	lep2,
		double &	costh,
		double &	phi
	)

static

Calculate the decay angles in the Vector Boson Helicity Frame.

Parameters

[in]	lep1	four-vector of lepton one.
[in]	charge1	charge of lepton one.
[in]	lep2	four-vector of lepton two.
[out]	costh	\(\cos\theta_{VH}\).
[out]	phi	\(\phi_{VH}\).

Definition at line 74 of file Kinematics.cxx.

◆ MT()

double NAGASH::Kinematics::MT	(	const TLorentzVector &	l1,
		const TLorentzVector &	l2
	)

inlinestatic

Calculate the transverse momentum of a two-particle-system.

Parameters

l1	four-vector of particle one.
l2	four-vector particle two.

Returns: the transverse momentum value.

Definition at line 41 of file Kinematics.h.

◆ SumAiPolynominals()

double NAGASH::Kinematics::SumAiPolynominals	(	std::vector< double > &	ai,
		std::vector< double > &	aimom
	)

inlinestatic

Calculate the angular polynomials.

Parameters

ai	the \(A_i\)s
aimom	the value of each angular term.

Returns

Definition at line 80 of file Kinematics.h.

The documentation for this class was generated from the following files:

include/NAGASH/Kinematics.h
src/Kinematics.cxx

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Kinematics()

Member Function Documentation

◆ CosthStar()

◆ DeltaPhi()

◆ DeltaR()

◆ GetAiPolynominals() [1/2]

◆ GetAiPolynominals() [2/2]

◆ GetBDFAngles()

◆ GetCSFAngles()

◆ GetProjections()

◆ GetVHFAngles()

◆ MT()

◆ SumAiPolynominals()