TPythia6Decayer

TPythia6Decayer* Instance()

 Get the singleton object.

TPythia6Decayer()

 Constructor

void Init()

 Initialize the decayer

void Decay(Int_t idpart, TLorentzVector* p)

 Decay a particle of type IDPART (PDG code) and momentum P.

Int_t ImportParticles(TClonesArray *particles)

 Get the decay products into the passed PARTICLES TClonesArray of
 TParticles

void SetForceDecay(Int_t type)

 Force a particular decay type

void ForceDecay()

 Force a particle decay mode

Float_t GetPartialBranchingRatio(Int_t ipart)

 Get the partial branching ratio for a particle of type IPART (a
 PDG code).

Float_t GetLifetime(Int_t kf)

 Get the life-time of a particle of type KF (a PDG code).

void ReadDecayTable()

 Read in particle data from an ASCII file.   The file name must
 previously have been set using the member function
 SetDecayTableFile.

void WriteDecayTable()

 write particle data to an ASCII file.   The file name must
 previously have been set using the member function
 SetDecayTableFile.

 Users can use this function to make an initial decay list file,
 which then can be edited by hand, and re-loaded into the decayer
 using ReadDecayTable.

 The file syntax is

    particle_list : partcle_data
                  | particle_list particle_data
                  ;
    particle_data : particle_info
                  | particle_info '\n' decay_list
                  ;
    particle_info : See below
                  ;
    decay_list    : decay_entry
                  | decay_list decay_entry
                  ;
    decay_entry   : See below

 The particle_info consists of 13 fields:

     PDG code             int
     Name                 string
     Anti-particle name   string  if there's no anti-particle,
                                  then this field must be the
                                  empty string
     Electic charge       int     in units of |e|/3
     Color charge         int     in units of quark color charges
     Have anti-particle   int     1 of there's an anti-particle
                                  to this particle, or 0
                                  otherwise
     Mass                 float   in units of GeV
     Resonance width      float
     Max broadning        float
     Lifetime             float
     MWID                 int     ??? (some sort of flag)
     Decay                int     1 if it decays. 0 otherwise

 The format to write these entries in are

    " %9  %-16s  %-16s%3d%3d%3d%12.5f%12.5f%12.5f%13.gf%3d%d\n"

 The decay_entry consists of 8 fields:

     On/Off               int     1 for on, -1 for off
     Matrix element type  int
     Branching ratio      float
     Product 1            int     PDG code of decay product 1
     Product 2            int     PDG code of decay product 2
     Product 3            int     PDG code of decay product 3
     Product 4            int     PDG code of decay product 4
     Product 5            int     PDG code of decay product 5

 The format for these lines are

    "          %5d%5d%12.5f%10d%10d%10d%10d%10d\n"

Int_t CountProducts(Int_t channel, Int_t particle)

 Count number of decay products

void ForceHadronicD()

 Force golden D decay modes

void ForceParticleDecay(Int_t particle, Int_t product, Int_t mult)

  Force decay of particle into products with multiplicity mult

void ForceParticleDecay(Int_t particle, Int_t* products, Int_t* mult, Int_t npart)

  Force decay of particle into products with multiplicity mult

void ForceOmega()

 Force Omega -> Lambda K- Decay

void SetForceDecay(Int_t type)

void SetDecayTableFile(const char* name)

 Extension member functions

TPythia6Decayer

class TPythia6Decayer : public TVirtualMCDecayer

Data Members

Class Description