siscone_spherical::CSphmomentum Class Reference

base class for dynamic coordinates management More...

#include <momentum.h>

Inheritance diagram for siscone_spherical::CSphmomentum:

Collaboration diagram for siscone_spherical::CSphmomentum:

Public Member Functions
	CSphmomentum ()
	default ctor
	CSphmomentum (CSph3vector &init, double E=0.0)
	init from a 3-vect
	CSphmomentum (double _px, double _py, double _pz, double _E)
	ctor with initialisation
	~CSphmomentum ()
	ctor with detailed initialisation
double	mass () const
	computes m
double	mass2 () const
	computes m^2
double	perpmass () const
	transverse mass, mt = sqrt(pt^2+m^2) = sqrt(E^2 - pz^2)
double	perpmass2 () const
	transverse mass squared, mt^2 = pt^2+m^2 = E^2 - pz^2
double	Et () const
	computes transverse energy
double	Et2 () const
	computes transverse energy (squared)
CSphmomentum &	operator= (const CSphmomentum &v)
	assignment of vectors
const CSphmomentum	operator+ (const CSphmomentum &v)
	addition of vectors !!! WARNING !!! no updating of eta and phi !!!
CSphmomentum &	operator+= (const CSphmomentum &v)
	incrementation of vectors !!! WARNING !!! no updating of eta and phi !!!
CSphmomentum &	operator-= (const CSphmomentum &v)
	decrementation of vectors !!! WARNING !!! no updating of eta and phi !!!
Public Member Functions inherited from siscone_spherical::CSph3vector
	CSph3vector ()
	default ctor
	CSph3vector (double _px, double _py, double _pz)
	ctor with initialisation
	~CSph3vector ()
	default dtor
CSph3vector &	operator= (const CSph3vector &v)
	assignment of vectors
const CSph3vector	operator+ (const CSph3vector &v)
	addition of vectors WARNING= norm is not updated
const CSph3vector	operator- (const CSph3vector &v)
	subtraction of vectors WARNING= norm is not updated
const CSph3vector	operator/ (const double &r)
	division by a constant WARNING= norm is not updated
CSph3vector &	operator+= (const CSph3vector &v)
	incrementation of vectors WARNING= norm is not updated
CSph3vector &	operator-= (const CSph3vector &v)
	decrementation of vectors WARNING= norm is not updated
CSph3vector &	operator*= (const double &r)
	multiplication by a constant WARNING= norm is not updated
CSph3vector &	operator/= (const double &r)
	division by a constant WARNING= norm is not updated
double	perp () const
	computes pT
double	perp2 () const
	computes pT^2
double	norm () const
	3-vect norm
double	norm2 () const
	3-vect norm squared
double	phi () const
	3-vect azimuthal angle
double	theta () const
	3-vect polar angle
void	build_norm ()
	build the spatial normfrom 4-momentum info !!! WARNING !!! !!! computing the norm is the only time-consuming !!! !!! information we need in all computations.
void	build_thetaphi ()
	just a useful tool to store theta and phi locally (in _theta and _phi) in case you need repeated access
void	get_angular_directions (CSph3vector &angular_dir1, CSph3vector &angular_dir2)
	for this direction, compute the two reference directions used to measure angles

Public Attributes
double	E
	energy
int	parent_index
	particle number in the parent list
int	index
	internal particle number
Public Attributes inherited from siscone_spherical::CSph3vector
double	px
	x-momentum
double	py
	y-momentum
double	pz
	z-momentum
double	_norm
	particle spatial norm (available ONLY after a call to build_norm)
double	_theta
	particle theta angle (available ONLY after a call to build_thetaphi)
double	_phi
	particle phi angle (available ONLY after a call to build_thetaphi)
siscone::Creference	ref
	reference number for the vector

Detailed Description

base class for dynamic coordinates management

This class contains the information for particle or group of particles management. It is adapted to use spherical geometry, where, for our purposes, the only time-consuming operation we need is the computation of the norm. To compute it once-and-for-all and store it in a local variable, you should call the 'build_norm' method. On top of that, the angle phi is computed from the x-axis and theta from the "north pole".

Definition at line 158 of file momentum.h.

Constructor & Destructor Documentation

CSphmomentum() [1/3]

siscone_spherical::CSphmomentum::CSphmomentum

(

)

default ctor

Definition at line 194 of file momentum.cpp.

References E, and index.

CSphmomentum() [2/3]

siscone_spherical::CSphmomentum::CSphmomentum	(	CSph3vector &	init,
		double	E = 0.0
	)

init from a 3-vect

Definition at line 211 of file momentum.cpp.

References E.

CSphmomentum() [3/3]

siscone_spherical::CSphmomentum::CSphmomentum	(	double	_px,
		double	_py,
		double	_pz,
		double	_E
	)

ctor with initialisation

Definition at line 201 of file momentum.cpp.

References siscone_spherical::CSph3vector::build_thetaphi(), and E.

~CSphmomentum()

siscone_spherical::CSphmomentum::~CSphmomentum

(

)

ctor with detailed initialisation

default dtor

Definition at line 218 of file momentum.cpp.

Member Function Documentation

Et()

double siscone_spherical::CSphmomentum::Et ( ) const

inline

computes transverse energy

Definition at line 188 of file momentum.h.

References E, siscone_spherical::CSph3vector::perp2(), and siscone_spherical::CSph3vector::pz.

Et2()

double siscone_spherical::CSphmomentum::Et2 ( ) const

inline

computes transverse energy (squared)

Definition at line 191 of file momentum.h.

References E, siscone_spherical::CSph3vector::perp2(), and siscone_spherical::CSph3vector::pz.

mass()

double siscone_spherical::CSphmomentum::mass ( ) const

inline

computes m

Definition at line 176 of file momentum.h.

References mass2().

mass2()

double siscone_spherical::CSphmomentum::mass2 ( ) const

inline

computes m^2

Definition at line 179 of file momentum.h.

References siscone_spherical::CSph3vector::perp2(), and perpmass2().

Referenced by mass().

operator+()

const CSphmomentum siscone_spherical::CSphmomentum::operator+

(

const CSphmomentum &

v

)

addition of vectors !!! WARNING !!! no updating of eta and phi !!!

Definition at line 241 of file momentum.cpp.

operator+=()

CSphmomentum & siscone_spherical::CSphmomentum::operator+=

(

const CSphmomentum &

v

)

incrementation of vectors !!! WARNING !!! no updating of eta and phi !!!

Definition at line 249 of file momentum.cpp.

References E, siscone_spherical::CSph3vector::px, siscone_spherical::CSph3vector::py, siscone_spherical::CSph3vector::pz, and siscone_spherical::CSph3vector::ref.

operator-=()

CSphmomentum & siscone_spherical::CSphmomentum::operator-=

(

const CSphmomentum &

v

)

decrementation of vectors !!! WARNING !!! no updating of eta and phi !!!

Definition at line 263 of file momentum.cpp.

References E, siscone_spherical::CSph3vector::px, siscone_spherical::CSph3vector::py, siscone_spherical::CSph3vector::pz, and siscone_spherical::CSph3vector::ref.

operator=()

CSphmomentum & siscone_spherical::CSphmomentum::operator=

(

const CSphmomentum &

v

)

assignment of vectors

Definition at line 224 of file momentum.cpp.

References siscone_spherical::CSph3vector::_norm, siscone_spherical::CSph3vector::_phi, siscone_spherical::CSph3vector::_theta, E, siscone_spherical::CSph3vector::px, siscone_spherical::CSph3vector::py, siscone_spherical::CSph3vector::pz, and siscone_spherical::CSph3vector::ref.

perpmass()

double siscone_spherical::CSphmomentum::perpmass ( ) const

inline

transverse mass, mt = sqrt(pt^2+m^2) = sqrt(E^2 - pz^2)

Definition at line 182 of file momentum.h.

References E, and siscone_spherical::CSph3vector::pz.

perpmass2()

double siscone_spherical::CSphmomentum::perpmass2 ( ) const

inline

transverse mass squared, mt^2 = pt^2+m^2 = E^2 - pz^2

Definition at line 185 of file momentum.h.

References E, and siscone_spherical::CSph3vector::pz.

Referenced by mass2().

Member Data Documentation

E

double siscone_spherical::CSphmomentum::E

energy

Definition at line 208 of file momentum.h.

Referenced by siscone_spherical::CSphsplit_merge::add_hardest_protocone_to_jets(), CSphmomentum(), CSphmomentum(), CSphmomentum(), Et(), Et2(), siscone_spherical::CSphsplit_merge_ptcomparison::get_difference(), siscone_spherical::CSphsplit_merge_ptcomparison::operator()(), operator+=(), operator-=(), operator=(), perpmass(), perpmass2(), siscone_spherical::CSphsplit_merge::save_contents(), and siscone_spherical::CSphsplit_merge::show().

index

int siscone_spherical::CSphmomentum::index

internal particle number

Definition at line 211 of file momentum.h.

Referenced by siscone_spherical::CSphsplit_merge::add_hardest_protocone_to_jets(), siscone_spherical::CSphsplit_merge::add_protocones(), siscone_spherical::CSphvicinity::append_to_vicinity(), and CSphmomentum().

parent_index

int siscone_spherical::CSphmomentum::parent_index

particle number in the parent list

Definition at line 210 of file momentum.h.

Referenced by siscone_spherical::CSphsplit_merge::add_hardest_protocone_to_jets(), and siscone_spherical::CSphsplit_merge::add_protocones().

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

• siscone/spherical/momentum.h
• siscone/spherical/momentum.cpp