PYTHIA  8.303
Public Member Functions | List of all members
MiniStringFragmentation Class Reference

#include <MiniStringFragmentation.h>

Inheritance diagram for MiniStringFragmentation:
PhysicsBase

Public Member Functions

 MiniStringFragmentation ()
 Constructor.
 
void init (StringFlav *flavSelPtrIn, StringPT *pTSelPtrIn, StringZ *zSelPtrIn)
 Initialize and save pointers. More...
 
bool fragment (int iSub, ColConfig &colConfig, Event &event, bool isDiff=false, bool systemRecoil=true)
 Do the fragmentation: driver routine. More...
 
- Public Member Functions inherited from PhysicsBase
void initInfoPtr (Info &infoPtrIn)
 This function is called from above for physics objects used in a run. More...
 
virtual ~PhysicsBase ()
 Empty virtual destructor.
 
bool flag (string key) const
 Shorthand to read settings values.
 
int mode (string key) const
 
double parm (string key) const
 
string word (string key) const
 

Additional Inherited Members

- Public Types inherited from PhysicsBase
enum  Status {
  INCOMPLETE = -1, COMPLETE = 0, CONSTRUCTOR_FAILED, INIT_FAILED,
  LHEF_END, LOWENERGY_FAILED, PROCESSLEVEL_FAILED, PROCESSLEVEL_USERVETO,
  MERGING_FAILED, PARTONLEVEL_FAILED, PARTONLEVEL_USERVETO, HADRONLEVEL_FAILED,
  CHECK_FAILED, OTHER_UNPHYSICAL, HEAVYION_FAILED
}
 Enumerate the different status codes the event generation can have.
 
- Protected Member Functions inherited from PhysicsBase
 PhysicsBase ()
 Default constructor.
 
virtual void onInitInfoPtr ()
 
virtual void onBeginEvent ()
 This function is called in the very beginning of each Pythia::next call.
 
virtual void onEndEvent (Status)
 
virtual void onStat ()
 This function is called from the Pythia::stat() call.
 
void registerSubObject (PhysicsBase &pb)
 Register a sub object that should have its information in sync with this.
 
- Protected Attributes inherited from PhysicsBase
InfoinfoPtr = {}
 
SettingssettingsPtr = {}
 Pointer to the settings database.
 
ParticleDataparticleDataPtr = {}
 Pointer to the particle data table.
 
HadronWidthshadronWidthsPtr = {}
 Pointer to the hadron widths data table.
 
RndmrndmPtr = {}
 Pointer to the random number generator.
 
CoupSMcoupSMPtr = {}
 Pointers to SM and SUSY couplings.
 
CoupSUSYcoupSUSYPtr = {}
 
BeamParticlebeamAPtr = {}
 
BeamParticlebeamBPtr = {}
 
BeamParticlebeamPomAPtr = {}
 
BeamParticlebeamPomBPtr = {}
 
BeamParticlebeamGamAPtr = {}
 
BeamParticlebeamGamBPtr = {}
 
BeamParticlebeamVMDAPtr = {}
 
BeamParticlebeamVMDBPtr = {}
 
PartonSystemspartonSystemsPtr = {}
 Pointer to information on subcollision parton locations.
 
SigmaTotalsigmaTotPtr = {}
 Pointer to the total/elastic/diffractive cross sections.
 
set< PhysicsBase * > subObjects
 
UserHooksPtr userHooksPtr
 

Detailed Description

The MiniStringFragmentation class contains the routines to fragment occasional low-mass colour singlet partonic systems, where the string approach is not directly applicable (for technical reasons).

Member Function Documentation

bool fragment ( int  iSub,
ColConfig colConfig,
Event event,
bool  isDiff = false,
bool  systemRecoil = true 
)

Do the fragmentation: driver routine.

Junction topologies not yet considered - is very rare.

Read in info on system to be treated.

Do not want diffractive systems to easily collapse to one particle.

First try to produce two hadrons from the system.

If this fails, then form one hadron and shuffle momentum.

If also this fails, try to produce two hadrons with lower mass.

If also this fails, try to form a hadron with lower mass.

For low-energy systems may also search for a single hadron recoiler.

Else complete failure.

void init ( StringFlav flavSelPtrIn,
StringPT pTSelPtrIn,
StringZ zSelPtrIn 
)

Initialize and save pointers.

Save pointers.

Calculation and definition of hadron space-time production vertices.

Charm and bottom quark masses used for space-time offset.

Initialize the MiniStringFragmentation class proper.

Initialize the b parameter of the z spectrum, used when joining jets.


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