Implements constraint 0 = mass1 - mass2 - m. More...

#include <MassConstraint.h>

Inheritance diagram for MassConstraint:

Public Member Functions
	MassConstraint (double mass_=0.)
	Constructor. More...

virtual	~MassConstraint ()
	Virtual destructor.

virtual double	getValue () const
	Returns the value of the constraint.

virtual void	getDerivatives (int idim, double der[]) const
	Get first order derivatives. More...

virtual double	getMass (int flag=1)
	Get the actual invariant mass of the fit objects with a given flag. More...

virtual void	setMass (double mass_)
	Sets the target mass of the constraint. More...

virtual int	getVarBasis () const

Public Member Functions inherited from ParticleConstraint
	ParticleConstraint ()
	Creates an empty ParticleConstraint object.

virtual	~ParticleConstraint ()
	Virtual destructor.

virtual void	setFOList (std::vector< ParticleFitObject * > *fitobjects_)
	Adds several ParticleFitObject objects to the list. More...

virtual void	addToFOList (ParticleFitObject &fitobject, int flag=1)
	Adds one ParticleFitObject objects to the list.

virtual void	resetFOList ()
	Resests ParticleFitObject list.

virtual void	invalidateCache () const
	Invalidates any cached values for the next event.

Public Member Functions inherited from BaseHardConstraint
virtual	~BaseHardConstraint ()
	Virtual destructor.

virtual void	add1stDerivativesToMatrix (double *M, int idim) const
	Adds first order derivatives to global covariance matrix M. More...

virtual void	add2ndDerivativesToMatrix (double *M, int idim, double lambda) const
	Adds second order derivatives to global covariance matrix M. More...

virtual void	addToGlobalChi2DerVector (double *y, int idim, double lambda) const
	Add lambda times derivatives of chi squared to global derivative vector. More...

virtual double	dirDer (double p, double w, int idim, double mu=1)
	Calculate directional derivative. More...

virtual double	dirDerAbs (double p, double w, int idim, double mu=1)
	Calculate directional derivative for abs(c) More...

virtual double	getError () const
	Returns the error on the value of the constraint.

virtual int	getGlobalNum () const
	Accesses position of constraint in global constraint list.

virtual void	setGlobalNum (int iglobal)
	Sets position of constraint in global constraint list. More...

virtual void	printFirstDerivatives () const

virtual void	printSecondDerivatives () const

virtual void	test1stDerivatives ()

virtual void	test2ndDerivatives ()

virtual double	num1stDerivative (int ifo, int ilocal, double eps)
	Evaluates numerically the 1st derivative w.r.t. a parameter. More...

virtual double	num2ndDerivative (int ifo1, int ilocal1, double eps1, int ifo2, int ilocal2, double eps2)
	Evaluates numerically the 2nd derivative w.r.t. 2 parameters. More...

Public Member Functions inherited from BaseConstraint
	BaseConstraint ()
	Creates an empty BaseConstraint object.

	BaseConstraint (const BaseConstraint &rhs)
	Copy constructor. More...

BaseConstraint &	operator= (const BaseConstraint &rhs)
	Assignment. More...

virtual	~BaseConstraint ()
	Virtual destructor.

virtual const char *	getName () const
	Returns the name of the constraint.

virtual void	setName (const char *name_)
	Set object's name.

virtual std::ostream &	print (std::ostream &os) const
	print object to ostream More...

Protected Types
enum	{ VAR_BASIS =0 }

Protected Types inherited from BaseHardConstraint
typedef std::vector < BaseFitObject * >	FitObjectContainer
	Vector of pointers to ParticleFitObjects.

typedef FitObjectContainer::iterator	FitObjectIterator
	Iterator through vector of pointers to ParticleFitObjects.

typedef FitObjectContainer::const_iterator	ConstFitObjectIterator
	Constant iterator through vector of pointers to ParticleFitObjects.

Protected Member Functions
virtual bool	secondDerivatives (int i, int j, double *derivatives) const
	Second derivatives with respect to the 4-vectors of Fit objects i and j; result false if all derivatives are zero. More...

virtual bool	firstDerivatives (int i, double *derivatives) const
	First derivatives with respect to the 4-vector of Fit objects i; result false if all derivatives are zero. More...

Protected Attributes
double	mass
	The mass difference between object sets 1 and 2.

Protected Attributes inherited from BaseHardConstraint
FitObjectContainer	fitobjects
	The FitObjectContainer.

std::vector< double >	derivatives
	The derivatives.

std::vector< int >	flags
	The flags can be used to divide the FitObjectContainer into several subsets used for example to implement an equal mass constraint (see MassConstraint). More...

int	globalNum
	Position of constraint in global constraint list.

Protected Attributes inherited from BaseConstraint
char *	name

Additional Inherited Members
Related Functions inherited from BaseConstraint
std::ostream &	operator<< (std::ostream &os, const BaseConstraint &bc)
	Prints out a BaseConstraint, using its print method. More...

Detailed Description

Implements constraint 0 = mass1 - mass2 - m.

This class implements different mass constraints:

the invariant mass of several objects should be m
the difference of the invariant masses between two sets of objects should be m (normally m=0 in this case).

Author: Jenny List, Benno List Last update:

Date:: 2008/02/12 11:03:32

by:

Author:: blist

Constructor & Destructor Documentation

MassConstraint::MassConstraint ( double mass_ = 0. )

Constructor.

Parameters

mass_ The mass difference between object sets 1 and 2

Member Function Documentation

bool MassConstraint::firstDerivatives	(	int	i,
		double *	derivatives
	)		const

protectedvirtual

First derivatives with respect to the 4-vector of Fit objects i; result false if all derivatives are zero.

Parameters

i	number of 1st FitObject
derivatives	The result 4-vector

Implements BaseHardConstraint.

References BaseHardConstraint::fitobjects, BaseHardConstraint::flags, ParticleFitObject::getE(), ParticleFitObject::getPx(), ParticleFitObject::getPy(), and ParticleFitObject::getPz().

void MassConstraint::getDerivatives	(	int	idim,
		double	der[]
	)		const

virtual

Get first order derivatives.

Call this with a predefined array "der" with the necessary number of entries!

Parameters

idim	First dimension of the array
der	Array of derivatives, at least idim x idim

Implements BaseHardConstraint.

References BaseHardConstraint::fitobjects, BaseHardConstraint::flags, ParticleFitObject::getDE(), ParticleFitObject::getDPx(), ParticleFitObject::getDPy(), ParticleFitObject::getDPz(), ParticleFitObject::getE(), BaseFitObject::getName(), ParticleFitObject::getPx(), ParticleFitObject::getPy(), and ParticleFitObject::getPz().

double MassConstraint::getMass ( int flag = 1 )

virtual

Get the actual invariant mass of the fit objects with a given flag.

Parameters

flag The flag

References BaseHardConstraint::fitobjects, BaseHardConstraint::flags, ParticleFitObject::getE(), ParticleFitObject::getPx(), ParticleFitObject::getPy(), and ParticleFitObject::getPz().

bool MassConstraint::secondDerivatives	(	int	i,
		int	j,
		double *	derivatives
	)		const

protectedvirtual

Second derivatives with respect to the 4-vectors of Fit objects i and j; result false if all derivatives are zero.

Parameters

i	number of 1st FitObject
j	number of 2nd FitObject
derivatives	The result 4x4 matrix

Implements BaseHardConstraint.

References BaseHardConstraint::fitobjects, BaseHardConstraint::flags, ParticleFitObject::getE(), ParticleFitObject::getPx(), ParticleFitObject::getPy(), and ParticleFitObject::getPz().

void MassConstraint::setMass ( double mass_ )

virtual

Sets the target mass of the constraint.

Parameters

mass_ The new mass

References mass.

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

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation