HepMC3 event record library
Public Member Functions | Data Fields | Protected Member Functions
GenHeavyIon Class Reference

Detailed Description

Stores additional information about Heavy Ion generator.

This is an example of event attribute used to store Heavy Ion information

Examples:
HepMC3_fileIO_example.cc.

Definition at line 27 of file GenHeavyIon.h.

#include <GenHeavyIon.h>

+ Inheritance diagram for GenHeavyIon:
+ Collaboration diagram for GenHeavyIon:

Public Member Functions

 GenHeavyIon ()
 Empty default constructor. More...
 
bool from_string (const string &att) override
 Implementation of Attribute::from_string. More...
 
bool to_string (string &att) const override
 Implementation of Attribute::to_string. More...
 
bool operator== (const GenHeavyIon &) const
 Operator ==. More...
 
bool operator!= (const GenHeavyIon &) const
 Operator !=. More...
 
void set (const int &nh, const int &np, const int &nt, const int &nc, const int &ns, const int &nsp, const int &nnw=0, const int &nwn=0, const int &nwnw=0, const double &im=0., const double &pl=0., const double &ec=0., const double &s=0., const double &cent=0., const double &ucent=0.)
 Set all fields. More...
 
bool is_valid () const
 Verify that the instance contains non-zero information. More...
 
virtual bool init ()
 Optionally initialize the attribute after from_string. More...
 
virtual bool init (const GenRunInfo &)
 Optionally initialize the attribute after from_string. More...
 
bool is_parsed () const
 Check if this attribute is parsed. More...
 
const string & unparsed_string () const
 Get unparsed string. More...
 
const GenEventevent () const
 
GenParticlePtr particle ()
 
ConstGenParticlePtr particle () const
 
GenVertexPtr vertex ()
 
ConstGenVertexPtr vertex () const
 

Data Fields

int Ncoll_hard
 the number of hard nucleon-nucleon collisions. More...
 
int Npart_proj
 the number of participating nucleons in the projectile. More...
 
int Npart_targ
 the number of participating nucleons in the target. More...
 
int Ncoll
 the number of inelastic nucleon-nucleon collisions. More...
 
int spectator_neutrons
 Total number of spectator neutrons. More...
 
int spectator_protons
 Total number of spectator protons. More...
 
int N_Nwounded_collisions
 Collisions with a diffractively excited target nucleon. More...
 
int Nwounded_N_collisions
 Collisions with a diffractively excited projectile nucleon. More...
 
int Nwounded_Nwounded_collisions
 Non-diffractive or doubly diffractive collisions. More...
 
double impact_parameter
 The impact parameter. More...
 
double event_plane_angle
 The event plane angle. More...
 
double eccentricity
 The eccentricity. More...
 
double sigma_inel_NN
 The assumed inelastic nucleon-nucleon cross section. More...
 
double centrality
 The centrality. More...
 
double user_cent_estimate
 A user defined centrality estimator. More...
 
int Nspec_proj_n
 The number of spectator neutrons in the projectile. More...
 
int Nspec_targ_n
 The number of spectator neutrons in the target. More...
 
int Nspec_proj_p
 The number of spectator protons in the projectile. More...
 
int Nspec_targ_p
 The number of spectator protons in the target. More...
 
map< int, double > participant_plane_angles
 Participant plane angles. More...
 
map< int, double > eccentricities
 Eccentricities. More...
 
bool forceoldformat
 force writing in old format for compatibility purposes. More...
 

Protected Member Functions

void set_is_parsed (bool flag)
 Set is_parsed flag. More...
 
void set_unparsed_string (const string &st)
 Set unparsed string. More...
 

Constructor & Destructor Documentation

◆ GenHeavyIon()

GenHeavyIon ( )
inline

Empty default constructor.

Definition at line 32 of file GenHeavyIon.h.

Member Function Documentation

◆ event()

const GenEvent* event ( ) const
inlineinherited

return the GenEvent to which this Attribute belongs, if at all.

Definition at line 109 of file Attribute.h.

References Attribute::m_event.

◆ from_string()

bool from_string ( const string &  att)
overridevirtual

◆ init() [1/2]

virtual bool init ( )
inlinevirtualinherited

Optionally initialize the attribute after from_string.

Reimplemented in HEPEUPAttribute.

Definition at line 82 of file Attribute.h.

◆ init() [2/2]

virtual bool init ( const GenRunInfo )
inlinevirtualinherited

Optionally initialize the attribute after from_string.

Is passed a reference to the GenRunInfo object to which the Attribute belongs.

Reimplemented in HEPEUPAttribute.

Definition at line 91 of file Attribute.h.

◆ is_parsed()

bool is_parsed ( ) const
inlineinherited

Check if this attribute is parsed.

Definition at line 103 of file Attribute.h.

References Attribute::m_is_parsed.

◆ is_valid()

bool is_valid ( ) const

◆ operator!=()

bool operator!= ( const GenHeavyIon a) const

Operator !=.

Definition at line 113 of file GenHeavyIon.cc.

◆ operator==()

bool operator== ( const GenHeavyIon a) const

Operator ==.

Definition at line 109 of file GenHeavyIon.cc.

◆ particle() [1/2]

GenParticlePtr particle ( )
inlineinherited

return the GenParticle to which this Attribute belongs, if at all.

Definition at line 114 of file Attribute.h.

References Attribute::m_particle.

◆ particle() [2/2]

ConstGenParticlePtr particle ( ) const
inlineinherited

return the GenParticle to which this Attribute belongs, if at all.

Definition at line 119 of file Attribute.h.

References Attribute::m_particle.

◆ set()

void set ( const int &  nh,
const int &  np,
const int &  nt,
const int &  nc,
const int &  ns,
const int &  nsp,
const int &  nnw = 0,
const int &  nwn = 0,
const int &  nwnw = 0,
const double &  im = 0.,
const double &  pl = 0.,
const double &  ec = 0.,
const double &  s = 0.,
const double &  cent = 0.,
const double &  ucent = 0. 
)

◆ set_is_parsed()

void set_is_parsed ( bool  flag)
inlineprotectedinherited

Set is_parsed flag.

Definition at line 135 of file Attribute.h.

References Attribute::m_is_parsed.

◆ set_unparsed_string()

void set_unparsed_string ( const string &  st)
inlineprotectedinherited

Set unparsed string.

Definition at line 138 of file Attribute.h.

References Attribute::m_string.

◆ to_string()

bool to_string ( string &  att) const
overridevirtual

◆ unparsed_string()

const string& unparsed_string ( ) const
inlineinherited

Get unparsed string.

Definition at line 106 of file Attribute.h.

References Attribute::m_string.

◆ vertex() [1/2]

GenVertexPtr vertex ( )
inlineinherited

return the GenVertex to which this Attribute belongs, if at all.

Definition at line 124 of file Attribute.h.

References Attribute::m_vertex.

◆ vertex() [2/2]

ConstGenVertexPtr vertex ( ) const
inlineinherited

return the GenVertex to which this Attribute belongs, if at all.

Definition at line 129 of file Attribute.h.

References Attribute::m_vertex.

Field Documentation

◆ centrality

double centrality

The centrality.

The generated centrality in percentiles, where 0 is the maximally central and 100 is the minimally central. A negative value means that the information is not available.

Definition at line 149 of file GenHeavyIon.h.

◆ eccentricities

map<int,double> eccentricities

Eccentricities.

Calculated to different orders. The key of the map specifies the order, and the value gives the corresponding eccentricity.

Definition at line 200 of file GenHeavyIon.h.

◆ eccentricity

double eccentricity

The eccentricity.

HEPMC3_DEPRECATED("Use eccentricities insted.")

Definition at line 134 of file GenHeavyIon.h.

◆ event_plane_angle

double event_plane_angle

The event plane angle.

The angle wrt. the x-axix of the impact parameter vector (pointing frm the target to the projectile). A positive number between 0 and two pi. A negative value means that the information is not available.

Definition at line 128 of file GenHeavyIon.h.

◆ forceoldformat

bool forceoldformat

force writing in old format for compatibility purposes.

HEPMC3_DEPRECATED("This should really not be needed");

Definition at line 239 of file GenHeavyIon.h.

◆ impact_parameter

double impact_parameter

The impact parameter.

The impact parameter given in units of femtometer. A negative value means that the information is not available.

Definition at line 120 of file GenHeavyIon.h.

◆ N_Nwounded_collisions

int N_Nwounded_collisions

Collisions with a diffractively excited target nucleon.

The number of single diffractive nucleon-nucleon collisions where the target nucleon is excited. A negative value means that the information is not available.

Definition at line 100 of file GenHeavyIon.h.

◆ Ncoll

int Ncoll

the number of inelastic nucleon-nucleon collisions.

Note that a one participating nucleon can be involved in many inelastic collisions, and that inelastic also includes diffractive excitation. A negative value means that the information is not available.

Definition at line 81 of file GenHeavyIon.h.

◆ Ncoll_hard

int Ncoll_hard

the number of hard nucleon-nucleon collisions.

Model-dependent. Usually the number of nucleon-nucleon collisions containing a special signal process. A negative value means that the information is not available.

Definition at line 58 of file GenHeavyIon.h.

◆ Npart_proj

int Npart_proj

the number of participating nucleons in the projectile.

The number of nucleons in the projectile participating in an inelastic collision (see Ncoll). A negative value means that the information is not available.

Definition at line 65 of file GenHeavyIon.h.

◆ Npart_targ

int Npart_targ

the number of participating nucleons in the target.

The number of nucleons in the target participating in an inelastic collision (see Ncoll). A negative value means that the information is not available.

Definition at line 72 of file GenHeavyIon.h.

◆ Nspec_proj_n

int Nspec_proj_n

The number of spectator neutrons in the projectile.

ie. those that thave not participated in any inelastic nucleon-nucleon collision. A negative value indicatess that the information is not available.

Definition at line 166 of file GenHeavyIon.h.

◆ Nspec_proj_p

int Nspec_proj_p

The number of spectator protons in the projectile.

ie. those that thave not participated in any inelastic nucleon-nucleon collision. A negative value indicatess that the information is not available.

Definition at line 180 of file GenHeavyIon.h.

◆ Nspec_targ_n

int Nspec_targ_n

The number of spectator neutrons in the target.

ie. those that thave not participated in any inelastic nucleon-nucleon collision. A negative value indicatess that the information is not available.

Definition at line 173 of file GenHeavyIon.h.

◆ Nspec_targ_p

int Nspec_targ_p

The number of spectator protons in the target.

ie. those that thave not participated in any inelastic nucleon-nucleon collision. A negative value indicatess that the information is not available.

Definition at line 187 of file GenHeavyIon.h.

◆ Nwounded_N_collisions

int Nwounded_N_collisions

Collisions with a diffractively excited projectile nucleon.

The number of single diffractive nucleon-nucleon collisions where the projectile nucleon is excited. A negative value means that the information is not available.

Definition at line 107 of file GenHeavyIon.h.

◆ Nwounded_Nwounded_collisions

int Nwounded_Nwounded_collisions

Non-diffractive or doubly diffractive collisions.

The number of nucleon-nucleon collisions where both projectile and target nucleons are wounded. A negative value means that the information is not available.

Definition at line 114 of file GenHeavyIon.h.

◆ participant_plane_angles

map<int,double> participant_plane_angles

Participant plane angles.

calculated to different orders. The key of the map specifies the order, and the value gives to the angle wrt. the event plane.

Definition at line 194 of file GenHeavyIon.h.

◆ sigma_inel_NN

double sigma_inel_NN

The assumed inelastic nucleon-nucleon cross section.

in units of millibarn. As used in a Glauber calculation to simulate the distribution in Ncoll. A negative value means that the information is not available.

Definition at line 142 of file GenHeavyIon.h.

◆ spectator_neutrons

int spectator_neutrons

Total number of spectator neutrons.

HEPMC3_DEPRECATED("Use Nspec_proj_n and Nspec_targ_n instead.")

Definition at line 87 of file GenHeavyIon.h.

◆ spectator_protons

int spectator_protons

Total number of spectator protons.

HEPMC3_DEPRECATED("Use Nspec_proj_p and Nspec_targ_p instead.")

Definition at line 92 of file GenHeavyIon.h.

◆ user_cent_estimate

double user_cent_estimate

A user defined centrality estimator.

This variable may contain anything a generator feels is reasonable for estimating centrality. The value should be non-negative, and a low value corresponds to a low centrality. A negative value indicatess that the information is not available.

Definition at line 158 of file GenHeavyIon.h.


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