PYTHIA  8.312
Public Member Functions | List of all members
SigmaCombined Class Reference

#include <SigmaLowEnergy.h>

Inheritance diagram for SigmaCombined:
PhysicsBase

Public Member Functions

void init (SigmaLowEnergy *sigmaLowPtrIn)
 Initialize. More...
 
double sigmaTotal (int id1, int id2, double eCM12, double m1, double m2, int mixLoHi=0)
 Get total cross section. More...
 
double sigmaPartial (int id1, int id2, double eCM12, double m1, double m2, int type, int mixLoHi=0)
 Get partial cross sections. 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
 
vector< bool > fvec (string key) const
 
vector< int > mvec (string key) const
 
vector< double > pvec (string key) const
 
vector< string > wvec (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, HADRONLEVEL_USERVETO
}
 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.
 
LoggerloggerPtr = {}
 Pointer to logger.
 
HadronWidthshadronWidthsPtr = {}
 Pointer to the hadron widths data table.
 
RndmrndmPtr = {}
 Pointer to the random number generator.
 
CoupSMcoupSMPtr = {}
 Pointers to SM and SUSY couplings.
 
CoupSUSYcoupSUSYPtr = {}
 
BeamSetupbeamSetupPtr = {}
 
BeamParticlebeamAPtr = {}
 
BeamParticlebeamBPtr = {}
 
BeamParticlebeamPomAPtr = {}
 
BeamParticlebeamPomBPtr = {}
 
BeamParticlebeamGamAPtr = {}
 
BeamParticlebeamGamBPtr = {}
 
BeamParticlebeamVMDAPtr = {}
 
BeamParticlebeamVMDBPtr = {}
 
PartonSystemspartonSystemsPtr = {}
 Pointer to information on subcollision parton locations.
 
SigmaTotalsigmaTotPtr = {}
 Pointers to the total/elastic/diffractive cross sections.
 
SigmaCombinedsigmaCmbPtr = {}
 
set< PhysicsBase * > subObjects
 
UserHooksPtr userHooksPtr
 

Detailed Description

Get hadron-hadron cross sections, interpolating the low- and high-energy behaviours in SigmaLowEnergy and SigmaSaSDL respectively.

Member Function Documentation

void init ( SigmaLowEnergy sigmaLowPtrIn)

Initialize.

The SigmaCombined class.

Initialize.

Save pointer to low-energy cross sections.

Initialize high-energy cross sections.

Get parameters for transition from low- to high-energy description.

double sigmaPartial ( int  id1,
int  id2,
double  eCM12,
double  m1,
double  m2,
int  type,
int  mixLoHi = 0 
)

Get partial cross sections.

Routine to return a collision cross section for a subcollision. type = 0 : total; = 1 : nondiff; = 2 : el; = 3 : SD (XB); = 4 : SD (AX); = 5 : DD; = 6 : CD (AXB); = 7 : excitation; = 8 : annihilation; = 9 : resonant. mixLoHi = -1 : low-energy; = 0: mixed by energy; = 1 : high-energy.

Reject non-hadrons, including nuclei.

Resonances can only use low energy.

Reject unallowed type.

Perform calculation if new configuration.

Variables.

Decide if in crossover region, and if so relative mix.

Calculate cross sections at low energies.

Calculate cross sections at high energies.

Find hadron masses; for mesons replaced by vector meson ditto.

Evaluate cross sections.

Save used values to avoid need for recalculation.

Read out cross sections.

Done.

double sigmaTotal ( int  id1,
int  id2,
double  eCM12,
double  m1,
double  m2,
int  mixLoHi = 0 
)

Get total cross section.

Routine to return a collision total cross section for a subcollision. mixLoHi = -1 : low-energy; = 0: mixed by energy; = 1 : high-energy.

Reject non-hadrons, including nuclei.

Determine bounds of crossover region.

Pure low energy description.

Pure high energy description.

Mixed description.


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