EvtLundCharm Class Reference

#include <EvtLundCharm.hh>

Inheritance diagram for EvtLundCharm:

Public Member Functions
	EvtLundCharm ()
virtual	~EvtLundCharm ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	decay (EvtParticle *p)
std::string	commandName ()
void	command (std::string cmd)
void	init ()
void	initProbMax ()
int	getTotalEvt ()
Public Member Functions inherited from EvtDecayIncoherent
void	makeDecay (EvtParticle *p)
virtual	~EvtDecayIncoherent ()
void	setDaughterSpinDensity (int daughter)
int	isDaughterSpinDensitySet (int daughter)
Public Member Functions inherited from EvtDecayBase
virtual void	getName (std::string &name)=0
virtual void	decay (EvtParticle *p)=0
virtual void	makeDecay (EvtParticle *p)=0
virtual EvtDecayBase *	clone ()=0
virtual void	init ()
virtual void	initProbMax ()
virtual std::string	commandName ()
virtual void	command (std::string cmd)
double	getProbMax (double prob)
double	resetProbMax (double prob)
	EvtDecayBase ()
virtual	~EvtDecayBase ()
virtual bool	matchingDecay (const EvtDecayBase &other) const
EvtId	getParentId ()
double	getBranchingFraction ()
void	disableCheckQ ()
void	checkQ ()
int	getNDaug ()
EvtId *	getDaugs ()
EvtId	getDaug (int i)
int	getNArg ()
int	getPHOTOS ()
void	setPHOTOS ()
void	setVerbose ()
void	setSummary ()
double *	getArgs ()
std::string *	getArgsStr ()
double	getArg (int j)
std::string	getArgStr (int j)
std::string	getModelName ()
int	getDSum ()
int	summary ()
int	verbose ()
void	saveDecayInfo (EvtId ipar, int ndaug, EvtId *daug, int narg, std::vector< std::string > &args, std::string name, double brfr)
void	printSummary ()
void	setProbMax (double prbmx)
void	noProbMax ()
void	checkNArg (int a1, int a2=-1, int a3=-1, int a4=-1)
void	checkNDaug (int d1, int d2=-1)
void	checkSpinParent (EvtSpinType::spintype sp)
void	checkSpinDaughter (int d1, EvtSpinType::spintype sp)
virtual int	nRealDaughters ()

Static Public Member Functions
static void	LundcrmInit (int f)
Static Public Member Functions inherited from EvtDecayBase
static void	findMasses (EvtParticle *p, int ndaugs, EvtId daugs[10], double masses[10])
static void	findMass (EvtParticle *p)
static double	findMaxMass (EvtParticle *p)

Additional Inherited Members
Protected Member Functions inherited from EvtDecayBase
bool	daugsDecayedByParentModel ()
Protected Attributes inherited from EvtDecayBase
bool	_daugsDecayedByParentModel

Detailed Description

Definition at line 34 of file EvtLundCharm.hh.

Constructor & Destructor Documentation

EvtLundCharm()

EvtLundCharm::EvtLundCharm

(

)

Definition at line 72 of file EvtLundCharm.cc.

{}

Referenced by clone().

~EvtLundCharm()

EvtLundCharm::~EvtLundCharm ( )

virtual

Definition at line 74 of file EvtLundCharm.cc.

                           {
 
 
  int i;
 
 
  //the deletion of commands is really uggly!
 
  if (nlundcharmdecays==0) {
    delete [] commands;
    commands=0;
    return;
  }
 
  for(i=0;i<nlundcharmdecays;i++){
    if (lundcharmdecays[i]==this){
      lundcharmdecays[i]=lundcharmdecays[nlundcharmdecays-1];
      nlundcharmdecays--;
      if (nlundcharmdecays==0) {
    delete [] commands;
    commands=0;
      }
      return;
    }
  }
 
  report(ERROR,"EvtGen") << "Error in destroying LundCharm model!"<<endl;
 
}

Member Function Documentation

clone()

EvtDecayBase * EvtLundCharm::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 111 of file EvtLundCharm.cc.

                                 {
 
  return new EvtLundCharm;
 
}

command()

void EvtLundCharm::command ( std::string  cmd )

virtual

Reimplemented from EvtDecayBase.

Definition at line 154 of file EvtLundCharm.cc.

                                       {
 
  if (ncommand==lcommand){
 
    lcommand=10+2*lcommand;
 
    std::string* newcommands=new std::string[lcommand];
    
    int i;
 
    for(i=0;i<ncommand;i++){
      newcommands[i]=commands[i];
    }
    
    delete [] commands;
 
    commands=newcommands;
 
  }
 
  commands[ncommand]=cmd;
 
  ncommand++;
 
 
}

commandName()

std::string EvtLundCharm::commandName ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 148 of file EvtLundCharm.cc.

                                   {
     
  return std::string("LundCharmPar");
  
}

decay()

void EvtLundCharm::decay ( EvtParticle *  p )

virtual

Implements EvtDecayBase.

Definition at line 183 of file EvtLundCharm.cc.

                                       {
 
  static int iniflag=0;
 
  static EvtId STRNG=EvtPDL::getId("string");
 
  int istdheppar=EvtPDL::getStdHep(p->getId());
 
/*
  if (pycomp_(&istdheppar)==0){
    report(ERROR,"EvtGen") << "LundCharm can not decay:"
      <<EvtPDL::name(p->getId()).c_str()<<endl;
    return;
  }
*/
 
//  std::cout<<"Lundcharm decaying "<<EvtPDL::name(p->getId())<<" mass: "<<p->getP4().mass()<<std::endl;
 
// no eta_c(2S) in jetset74, so we don't include it in lundcharm
  if(istdheppar != 443 && istdheppar != 100443 && istdheppar != 10441 &&istdheppar != 20443 &&istdheppar != 445 &&istdheppar != 10443 &&istdheppar != 441 &&istdheppar!= 30443){
    std::cout<<"EvtGen: EvtLundCharm cann't not decay the particle pid= "<<istdheppar<<endl;
    ::abort();
  }
  
  double mp=p->mass();
  float xmp=mp;
  double totEn=0;
//  std::cout<<"float xmp="<<xmp<<std::endl;
 
  EvtVector4R p4[20];
  
  int i,more, pflag;;
  int ip=EvtPDL::getStdHep(p->getId());
  int ndaugjs;
  static int kf[100];
  EvtId evtnumstable[100],evtnumparton[100];
  int stableindex[100],partonindex[100];
  int numstable;
  int numparton;
  static int km[100];
  EvtId type[MAX_DAUG];
 
  static double px[100],py[100],pz[100],e[100];
  static int myflag;
  if (iniflag==0) lundcrm_(&iniflag,&istdheppar,&xmp,&ndaugjs,kf,km,px,py,pz,e, &myflag);
  LundcrmInit(0); // Allow user to set LundCharmPar in decay list
 
  if ( p->getNDaug() != 0 ) { p->deleteDaughters(true);}
 
  string name_parent = EvtPDL::name(p->getId());
  double parityi=parityC::getC(name_parent);
  int count=0;
  do{
    //report(INFO,"EvtGen") << "calling lundcharm " << ip<< " " << mp <<endl;
    iniflag=iniflag+1;  //to count the event number
    lundcrm_(&iniflag,&istdheppar,&xmp,&ndaugjs,kf,km,px,py,pz,e, &myflag);
    //-- change myflag to unsigned int
 
    p->setGeneratorFlag(myflag);
    // std::cout<<"EvtLundCharm::setGeneratorFalg= "<<myflag<<std::endl; 
    numstable=0;
    numparton=0;
    //report(INFO,"EvtGen") << "found some daughters " << ndaugjs << endl;
    totEn=0;    
    double parityf=1;
    for(i=0;i<ndaugjs;i++){
      //std::cout<<"ndaugjs,kf,km,px,py,pz,e: "<<i<<", "<<km[i]<<", "<<kf[i]<<", "<<px[i]<<" ,"<<py[i]<<", "<<pz[i]<<", "<<e[i]<<std::endl; //for debugging
      totEn +=e[i];
      string name_daugi = EvtPDL::name( EvtPDL::evtIdFromStdHep(kf[i]) );
      parityf = parityf*parityC::getC(name_daugi);
 
      if (EvtPDL::evtIdFromStdHep(kf[i])==EvtId(-1,-1)) {
    report(ERROR,"EvtGen") << "LundCharm returned particle:"<<kf[i]<<endl;
    report(ERROR,"EvtGen") << "This can not be translated to evt number"<<endl;
    report(ERROR,"EvtGen") << "and the decay will be rejected!"<<endl;
    report(ERROR,"EvtGen") << "The decay was of particle:"<<ip<<endl;
 
      }
 
      //sort out the partons
      if (abs(kf[i])<=6||kf[i]==21){
    partonindex[numparton]=i;
    evtnumparton[numparton]=EvtPDL::evtIdFromStdHep(kf[i]);
    numparton++;
      }
      else{
    stableindex[numstable]=i;
    evtnumstable[numstable]=EvtPDL::evtIdFromStdHep(kf[i]); 
    numstable++;
      }
 
 
      // have to protect against negative mass^2 for massless particles
      // i.e. neutrinos and photons.
      // this is uggly but I need to fix it right now....
 
      if (px[i]*px[i]+py[i]*py[i]+pz[i]*pz[i]>=e[i]*e[i]){
 
        e[i]=sqrt(px[i]*px[i]+py[i]*py[i]+pz[i]*pz[i])+0.0000000001;
 
      }
 
      p4[i].set(e[i],px[i],py[i],pz[i]);
 
 
    }
 
    int channel=EvtDecayTable::inChannelList(p->getId(),numstable,evtnumstable);
  
    // Test the branching fraction of lundcharm
    // the specified decay mode is put as the 0-th channel with specifing mother particle
    /*
    if(ip==100443 && channel==0){
      nevt++;
      std::cout<<"nevt= "<<nevt<<std::endl;
      channel=-1;
    }
    */
    // std::cout<<"channel= "<<channel<<std::endl;
   if(parityi!=0 && parityf!=0){
      pflag=(parityi!=parityf);
   }else{pflag=2;}
 
    bool eck = fabs(xmp-totEn)>0.01;
    // std::cout<<"eck= "<<eck<<", "<<fabs(xmp-totEn)<<std::endl;
    more=(channel!=-1 || pflag ==1 || eck);
  // more=(channel!=-1);
 
    //---debugging
    //std::cout<<"parentId= "<<istdheppar<<", pflag= "<<pflag<<std::endl;
    //if(pflag==1) abort();
 
 
  count++;
 
  }while( more && (count<10000) );
 
  /*
  if(fabs(xmp-totEn)>0.01){ 
    std::cout<<"Warning:LUNDCHARM generate incomplet final state, "<<mp<<" "<<totEn<<endl;
    ::abort();
  }
  */
 
  if (count>9999) {
    report(INFO,"EvtGen") << "Too many loops in EvtLundCharm!!!"<<endl;
    report(INFO,"EvtGen") << "Parent:"<<EvtPDL::name(getParentId()).c_str()<<endl;
    for(i=0;i<numstable;i++){
      report(INFO,"EvtGen") << "Daug("<<i<<")"<<EvtPDL::name(evtnumstable[i]).c_str()<<endl;
    }
 
  }
 
 
 
  if (numparton==0){
 
    p->makeDaughters(numstable,evtnumstable);
    int ndaugFound=0;
    for(i=0;i<numstable;i++){
      p->getDaug(i)->init(evtnumstable[i],p4[stableindex[i]]);
      ndaugFound++;
    }
    if ( ndaugFound == 0 ) {
      report(ERROR,"EvtGen") << "Lundcharm has failed to do a decay ";
      report(ERROR,"EvtGen") << EvtPDL::name(p->getId()).c_str() << " " << p->mass()<<endl;
      assert(0);
    }
 
    fixPolarizations(p);
 
    return ;
   
  }
  else{
 
    //have partons in LUNDCHARM
 
    EvtVector4R p4string(0.0,0.0,0.0,0.0);
 
    for(i=0;i<numparton;i++){
      p4string+=p4[partonindex[i]];
    }
 
    int nprimary=1;
    type[0]=STRNG;
    for(i=0;i<numstable;i++){
      if (km[stableindex[i]]==0){
    type[nprimary++]=evtnumstable[i];
      }
    }
 
    p->makeDaughters(nprimary,type);
 
    p->getDaug(0)->init(STRNG,p4string);
 
    EvtVector4R p4partons[10];
 
    for(i=0;i<numparton;i++){
      p4partons[i]=p4[partonindex[i]];
    }
 
    ((EvtStringParticle*)p->getDaug(0))->initPartons(numparton,p4partons,evtnumparton);
 
 
 
    nprimary=1;
 
    for(i=0;i<numstable;i++){
 
      if (km[stableindex[i]]==0){
    p->getDaug(nprimary++)->init(evtnumstable[i],p4[stableindex[i]]);
      }
    }
 
 
    int nsecond=0;
    for(i=0;i<numstable;i++){
      if (km[stableindex[i]]!=0){
    type[nsecond++]=evtnumstable[i];
      }
    }
 
 
    p->getDaug(0)->makeDaughters(nsecond,type);
 
    EvtVector4R p4stringboost(p4string.get(0),-p4string.get(1),
                  -p4string.get(2),-p4string.get(3));
 
    nsecond=0;
    for(i=0;i<numstable;i++){
      if (km[stableindex[i]]!=0){
    p4[stableindex[i]]=boostTo(p4[stableindex[i]],p4stringboost);
    p->getDaug(0)->getDaug(nsecond)->init(evtnumstable[i],p4[stableindex[i]]);
    p->getDaug(0)->getDaug(nsecond)->setDiagonalSpinDensity();
    p->getDaug(0)->getDaug(nsecond)->decay();
    nsecond++;
      }
    }
 
    if ( nsecond == 0 ) {
      report(ERROR,"EvtGen") << "Jetset has failed to do a decay ";
      report(ERROR,"EvtGen") << EvtPDL::name(p->getId()).c_str() << " " << p->mass() <<endl;
      assert(0);
    }
 
    fixPolarizations(p);
 
    return ;
 
  }
 
}

getName()

void EvtLundCharm::getName ( std::string &  name )

virtual

Implements EvtDecayBase.

Definition at line 105 of file EvtLundCharm.cc.

                                               {
 
  model_name="LUNDCHARM";     
 
}

getTotalEvt()

int EvtLundCharm::getTotalEvt ( )

inline

Definition at line 51 of file EvtLundCharm.hh.

{return nevt;}

init()

void EvtLundCharm::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 125 of file EvtLundCharm.cc.

                       {
 
//  checkNArg(1);
    parityC::readParityC();
 
  if (getParentId().isAlias()){
 
    report(ERROR,"EvtGen") << "EvtLundCharm finds that you are decaying the"<<endl
                           << " aliased particle "
               << EvtPDL::name(getParentId()).c_str()
               << " with the LundCharm model"<<endl
               << " this does not work, please modify decay table."
               << endl;
    report(ERROR,"EvtGen") << "Will terminate execution!"<<endl;
    ::abort();
 
  }
 
  store(this);
 
}

initProbMax()

void EvtLundCharm::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 118 of file EvtLundCharm.cc.

                              {
 
  noProbMax();
 
}

LundcrmInit()

void EvtLundCharm::LundcrmInit ( int  f )

static

Definition at line 499 of file EvtLundCharm.cc.

                                       {
  
  static int first=1;
  if (first){
    
    first=0;
    for(int i=0;i<ncommand;i++)
      lugive_(commands[i].c_str(),strlen(commands[i].c_str()));
  }
 
 
}

Referenced by decay().

---

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

• EvtLundCharm.hh
• EvtLundCharm.cc