EvtBtoXsll Class Reference

#include <EvtBtoXsll.hh>

Inheritance diagram for EvtBtoXsll:

List of all members.

Public Member Functions
void	checkNArg (int a1, int a2=-1, int a3=-1, int a4=-1)
void	checkNDaug (int d1, int d2=-1)
void	checkQ ()
void	checkSpinDaughter (int d1, EvtSpinType::spintype sp)
void	checkSpinParent (EvtSpinType::spintype sp)
EvtDecayBase *	clone ()
virtual void	command (std::string cmd)
virtual std::string	commandName ()
void	decay (EvtParticle *p)
void	disableCheckQ ()
	EvtBtoXsll ()
double	getArg (int j)
double *	getArgs ()
std::string *	getArgsStr ()
std::string	getArgStr (int j)
double	getBranchingFraction ()
EvtId	getDaug (int i)
EvtId *	getDaugs ()
int	getDSum ()
std::string	getModelName ()
void	getName (std::string &name)
int	getNArg ()
int	getNDaug ()
EvtId	getParentId ()
int	getPHOTOS ()
double	getProbMax (double prob)
void	init ()
void	initProbMax ()
int	isDaughterSpinDensitySet (int daughter)
void	makeDecay (EvtParticle *p)
virtual bool	matchingDecay (const EvtDecayBase &other) const
void	noProbMax ()
virtual int	nRealDaughters ()
void	printSummary ()
double	resetProbMax (double prob)
void	saveDecayInfo (EvtId ipar, int ndaug, EvtId *daug, int narg, std::vector< std::string > &args, std::string name, double brfr)
void	setDaughterSpinDensity (int daughter)
void	setPHOTOS ()
void	setProbMax (double prbmx)
void	setSummary ()
void	setVerbose ()
int	summary ()
int	verbose ()
virtual	~EvtBtoXsll ()
Static Public Member Functions
void	findMass (EvtParticle *p)
void	findMasses (EvtParticle *p, int ndaugs, EvtId daugs[10], double masses[10])
double	findMaxMass (EvtParticle *p)
Protected Member Functions
bool	daugsDecayedByParentModel ()
Protected Attributes
bool	_daugsDecayedByParentModel
Private Attributes
EvtBtoXsllUtil *	_calcprob
double	_dGdsdupProbMax
double	_dGdsProbMax
double	_mb
double	_mq
double	_ms
double	_mxmin
double	_pf

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Constructor & Destructor Documentation

EvtBtoXsll::EvtBtoXsll (   )  [inline]

{}

EvtBtoXsll::~EvtBtoXsll (   )  [virtual]

{}

---

Member Function Documentation

void EvtDecayBase::checkNArg (  int  a1, int  a2 = -1, int  a3 = -1, int  a4 = -1 )  [inherited]

{ if ( _narg != a1 && _narg != a2 && _narg != a3 && _narg != a4 ) { report(ERROR,"EvtGen") << _modelname.c_str() << " generator expected "<<endl; report(ERROR,"EvtGen") << a1<<endl;; if ( a2>-1) { report(ERROR,"EvtGen") << " or " << a2<<endl; } if ( a3>-1) { report(ERROR,"EvtGen") << " or " << a3<<endl; } if ( a4>-1) { report(ERROR,"EvtGen") << " or " << a4<<endl; } report(ERROR,"EvtGen") << " arguments but found:"<< _narg << endl; printSummary(); report(ERROR,"EvtGen") << "Will terminate execution!"<<endl; ::abort(); } }

void EvtDecayBase::checkNDaug (  int  d1, int  d2 = -1 )  [inherited]

{ if ( _ndaug != d1 && _ndaug != d2 ) { report(ERROR,"EvtGen") << _modelname.c_str() << " generator expected "; report(ERROR,"EvtGen") << d1; if ( d2>-1) { report(ERROR,"EvtGen") << " or " << d2; } report(ERROR,"EvtGen") << " daughters but found:"<< _ndaug << endl; printSummary(); report(ERROR,"EvtGen") << "Will terminate execution!"<<endl; ::abort(); } }

void EvtDecayBase::checkQ (   )  [inherited]

{ int i; int q=0; int qpar; //If there are no daughters (jetset etc) then we do not //want to do this test. Why? Because sometimes the parent //will have a nonzero charge. if ( _ndaug != 0) { for(i=0; i<_ndaug; i++ ) { q += EvtPDL::chg3(_daug[i]); } qpar = EvtPDL::chg3(_parent); if ( q != qpar ) { report(ERROR,"EvtGen") <<_modelname.c_str()<< " generator expected " << " charge to be conserved, found:"<<endl; report(ERROR,"EvtGen") << "Parent charge of "<<(qpar/3)<<endl; report(ERROR,"EvtGen") << "Sum of daughter charge of "<<(q/3)<<endl; report(ERROR,"EvtGen") << "The parent is "<< EvtPDL::name(_parent).c_str()<<endl; for(i=0; i<_ndaug; i++ ) { report(ERROR,"EvtGen") << "Daughter "<< EvtPDL::name(_daug[i]).c_str()<<endl; } report(ERROR,"EvtGen") << "Will terminate execution!"<<endl; ::abort(); } } }

void EvtDecayBase::checkSpinDaughter (  int  d1, EvtSpinType::spintype  sp )  [inherited]

{ EvtSpinType::spintype parenttype = EvtPDL::getSpinType(getDaug(d1)); if ( parenttype != sp ) { report(ERROR,"EvtGen") << _modelname.c_str() << " did not get the correct daughter spin d=" << d1 << endl; printSummary(); report(ERROR,"EvtGen") << "Will terminate execution!"<<endl; ::abort(); } }

void EvtDecayBase::checkSpinParent (  EvtSpinType::spintype  sp  )  [inherited]

{ EvtSpinType::spintype parenttype = EvtPDL::getSpinType(getParentId()); if ( parenttype != sp ) { report(ERROR,"EvtGen") << _modelname.c_str() << " did not get the correct parent spin\n"; printSummary(); report(ERROR,"EvtGen") << "Will terminate execution!"<<endl; ::abort(); } }

EvtDecayBase * EvtBtoXsll::clone (   )  [virtual]

Implements EvtDecayBase. { return new EvtBtoXsll; }

void EvtDecayBase::command (  std::string  cmd  )  [virtual, inherited]

Reimplemented in EvtJetSet, EvtLunda, EvtLundCharm, EvtPythia, and EvtTauola. { report(ERROR,"EvtGen") << "Should never call EvtDecayBase::command"<<endl; ::abort(); }

std::string EvtDecayBase::commandName (   )  [virtual, inherited]

Reimplemented in EvtJetSet, EvtLunda, EvtLundCharm, EvtPythia, and EvtTauola. { return std::string(""); }

bool EvtDecayBase::daugsDecayedByParentModel (   )  [inline, protected, inherited]

{return _daugsDecayedByParentModel;}

void EvtBtoXsll::decay (  EvtParticle *  p  )  [virtual]

Implements EvtDecayBase. { p->makeDaughters(getNDaug(),getDaugs()); EvtParticle* xhadron = p->getDaug(0); EvtParticle* leptonp = p->getDaug(1); EvtParticle* leptonn = p->getDaug(2); double mass[3]; findMasses( p, getNDaug(), getDaugs(), mass ); double mB = p->mass(); double ml = mass[1]; double pb; int im = 0; static int nmsg = 0; double xhadronMass = -999.0; EvtVector4R p4xhadron; EvtVector4R p4leptonp; EvtVector4R p4leptonn; // require the hadronic system has mass greater than that of a Kaon pion pair // while (xhadronMass < 0.6333) // the above minimum value of K+pi mass appears to be too close // to threshold as far as JETSET is concerned // (JETSET gets caught in an infinite loop) // so we choose a lightly larger value for the threshold while (xhadronMass < _mxmin) { im++; // Apply Fermi motion and determine effective b-quark mass // Old BaBar MC parameters // double pf = 0.25; // double ms = 0.2; // double mq = 0.3; double mb = 0.0; double xbox, ybox; while (mb <= 0.0) { pb = _calcprob->FermiMomentum(_pf); // effective b-quark mass mb = mB*mB + _mq*_mq - 2.0*mB*sqrt(pb*pb + _mq*_mq); } mb = sqrt(mb); // cout << "b-quark momentum = " << pb << " mass = " << mb << endl; // generate a dilepton invariant mass double s = 0.0; double smin = 4.0 * ml * ml; double smax = (mb - _ms)*(mb - _ms); while (s == 0.0) { xbox = EvtRandom::Flat(smin, smax); ybox = EvtRandom::Flat(_dGdsProbMax); if (ybox < _calcprob->dGdsProb(mb, _ms, ml, xbox)) { s = xbox;} } // cout << "dGdsProb(s) = " << _calcprob->dGdsProb(mb, _ms, ml, s) // << " for s = " << s << endl; // two-body decay of b quark at rest into s quark and dilepton pair: // b -> s (ll) EvtVector4R p4sdilep[2]; double msdilep[2]; msdilep[0] = _ms; msdilep[1] = sqrt(s); EvtGenKine::PhaseSpace(2, msdilep, p4sdilep, mb); // generate dilepton decay with the expected asymmetry: (ll) -> l+ l- EvtVector4R p4ll[2]; double mll[2]; mll[0] = ml; mll[1] = ml; double tmp = 0.0; while (tmp == 0.0) { // (ll) -> l+ l- decay in dilepton rest frame EvtGenKine::PhaseSpace(2, mll, p4ll, msdilep[1]); // boost to b-quark rest frame p4ll[0] = boostTo(p4ll[0], p4sdilep[1]); p4ll[1] = boostTo(p4ll[1], p4sdilep[1]); // compute kinematical variable u EvtVector4R p4slp = p4sdilep[0] + p4ll[0]; EvtVector4R p4sln = p4sdilep[0] + p4ll[1]; double u = p4slp.mass2() - p4sln.mass2(); ybox = EvtRandom::Flat(_dGdsdupProbMax); double prob = _calcprob->dGdsdupProb(mb, _ms, ml, s, u); if (prob > _dGdsdupProbMax && nmsg < 20) { report(INFO,"EvtGen") << "d2gdsdup GT d2gdsdup_max:" << prob << " " << _dGdsdupProbMax << " for s = " << s << " u = " << u << " mb = " << mb << endl; nmsg++; } if (ybox < prob) { tmp = 1.0; // cout << "dGdsdupProb(s) = " << prob // << " for u = " << u << endl; } } // assign 4-momenta to valence quarks inside B meson in B rest frame double phi = EvtRandom::Flat( EvtConst::twoPi ); double costh = EvtRandom::Flat( -1.0, 1.0 ); double sinth = sqrt(1.0 - costh*costh); // b-quark four-momentum in B meson rest frame EvtVector4R p4b(sqrt(mb*mb + pb*pb), pb*sinth*sin(phi), pb*sinth*cos(phi), pb*costh); // B meson in its rest frame // // EvtVector4R p4B(mB, 0.0, 0.0, 0.0); // // boost B meson to b-quark rest frame // // p4B = boostTo(p4B, p4b); // // cout << " B meson mass in b-quark rest frame = " << p4B.mass() << endl; // boost s, l+ and l- to B meson rest frame // EvtVector4R p4s = boostTo(p4sdilep[0], p4B); // p4leptonp = boostTo(p4ll[0], p4B); // p4leptonn = boostTo(p4ll[1], p4B); EvtVector4R p4s = boostTo(p4sdilep[0], p4b); p4leptonp = boostTo(p4ll[0], p4b); p4leptonn = boostTo(p4ll[1], p4b); // spectator quark in B meson rest frame EvtVector4R p4q( sqrt(pb*pb + _mq*_mq), -p4b.get(1), -p4b.get(2), -p4b.get(3) ); // hadron system in B meson rest frame p4xhadron = p4s + p4q; xhadronMass = p4xhadron.mass(); // cout << "Xs mass = " << xhadronMass << " trial " << im << endl; } // initialize the decay products xhadron->init(getDaug(0), p4xhadron); // For B-bar mesons (i.e. containing a b quark) we have the normal // order of leptons if ( p->getId() == EvtPDL::getId("anti-B0") || p->getId() == EvtPDL::getId("B-") ) { leptonp->init(getDaug(1), p4leptonp); leptonn->init(getDaug(2), p4leptonn); } // For B mesons (i.e. containing a b-bar quark) we need to flip the // role of the positive and negative leptons in order to produce the // correct forward-backward asymmetry between the two leptons else { leptonp->init(getDaug(1), p4leptonn); leptonn->init(getDaug(2), p4leptonp); } return ; }

void EvtDecayBase::disableCheckQ (   )  [inline, inherited]

{_chkCharge=0;};

void EvtDecayBase::findMass (  EvtParticle *  p  )  [static, inherited]

{ //Need to also check that this mass does not screw //up the parent //This code assumes that for the ith daughter, 0..i-1 //already have a mass double maxOkMass=findMaxMass(p); int count=0; double mass; bool massOk=false; int i; while (!massOk) { count++; if ( count > 10000 ) { report(INFO,"EvtGen") << "Can not find a valid mass for: " << EvtPDL::name(p->getId()).c_str() <<endl; report(INFO,"EvtGen") << "Now printing parent and/or grandparent tree\n"; if ( p->getParent() ) { if ( p->getParent()->getParent() ) { p->getParent()->getParent()->printTree(); report(INFO,"EvtGen") << p->getParent()->getParent()->mass() <<endl; report(INFO,"EvtGen") << p->getParent()->mass() <<endl; } else{ p->getParent()->printTree(); report(INFO,"EvtGen") << p->getParent()->mass() <<endl; } } else p->printTree(); report(INFO,"EvtGen") << "maxokmass=" << maxOkMass << " " << EvtPDL::getMinMass(p->getId()) << " " << EvtPDL::getMaxMass(p->getId())<<endl; if ( p->getNDaug() ) { for (i=0; i<p->getNDaug(); i++) { report(INFO,"EvtGen") << p->getDaug(i)->mass()<<" "; } report(INFO,"EvtGen") << endl; } if ( maxOkMass >= EvtPDL::getMinMass(p->getId()) ) { report(INFO,"EvtGen") << "taking a default value\n"; p->setMass(maxOkMass); return; } assert(0); } mass = EvtPDL::getMass(p->getId()); //Just need to check that this mass is > than //the mass of all daughters double massSum=0.; if ( p->getNDaug() ) { for (i=0; i<p->getNDaug(); i++) { massSum+= p->getDaug(i)->mass(); } } //some special cases are handled with 0 (stable) or 1 (k0->ks/kl) daughters if (p->getNDaug()<2) massOk=true; if ( p->getParent() ) { if ( p->getParent()->getNDaug()==1 ) massOk=true; } if ( !massOk ) { if (massSum < mass) massOk=true; if ( mass> maxOkMass) massOk=false; } } p->setMass(mass); }

void EvtDecayBase::findMasses (  EvtParticle *  p, int  ndaugs, EvtId  daugs[10], double  masses[10] )  [static, inherited]

{ int i; double mass_sum; int count=0; if (!( p->firstornot() )) { for (i = 0; i < ndaugs; i++ ) { masses[i] = p->getDaug(i)->mass(); } //for } //if else { p->setFirstOrNot(); // if only one daughter do it if (ndaugs==1) { masses[0]=p->mass(); return; } //until we get a combo whose masses are less than _parent mass. do { mass_sum = 0.0; for (i = 0; i < ndaugs; i++ ) { masses[i] = EvtPDL::getMass(daugs[i]); mass_sum = mass_sum + masses[i]; } count++; if(count==10000) { report(ERROR,"EvtGen") <<"Decaying particle:"<< EvtPDL::name(p->getId()).c_str()<<" (m="<<p->mass()<<")"<<endl; report(ERROR,"EvtGen") <<"To the following daugthers"<<endl; for (i = 0; i < ndaugs; i++ ) { report(ERROR,"EvtGen") << EvtPDL::name(daugs[i]).c_str() << endl; } report(ERROR,"EvtGen") << "Has been rejected "<<count << " times, will now take minimal masses " << " of daugthers"<<endl; mass_sum=0.; for (i = 0; i < ndaugs; i++ ) { masses[i] = EvtPDL::getMinMass(daugs[i]); mass_sum = mass_sum + masses[i]; } if (mass_sum > p->mass()){ report(ERROR,"EvtGen") << "Parent mass="<<p->mass() << "to light for daugthers."<<endl << "Will throw the event away."<<endl; //dont terminate - start over on the event. EvtStatus::setRejectFlag(); mass_sum=0.; // ::abort(); } } } while ( mass_sum > p->mass()); } //else return; }

double EvtDecayBase::findMaxMass (  EvtParticle *  p  )  [static, inherited]

{ double maxOkMass=EvtPDL::getMaxMass(p->getId()); //protect against vphotons if ( maxOkMass < 0.0000000001 ) return 10000000.; //and against already determined masses if ( p->hasValidP4() ) maxOkMass=p->mass(); EvtParticle *par=p->getParent(); if ( par ) { double maxParMass=findMaxMass(par); int i; double minDaugMass=0.; for(i=0;i<par->getNDaug();i++){ EvtParticle *dau=par->getDaug(i); if ( dau!=p) { // it might already have a mass if ( dau->isInitialized() || dau->hasValidP4() ) minDaugMass+=dau->mass(); else //give it a bit of phase space minDaugMass+=1.000001*EvtPDL::getMinMass(dau->getId()); } } if ( maxOkMass>(maxParMass-minDaugMass)) maxOkMass=maxParMass-minDaugMass; } return maxOkMass; }

double EvtDecayBase::getArg (  int  j  )  [inherited]

{ // Verify string const char* str = _args[j].c_str(); int i = 0; while(str[i]!=0){ if (isalpha(str[i]) && str[i]!='e') { report(INFO,"EvtGen") << "String " << str << " is not a number" << endl; assert(0); } i++; } char** tc=0; return strtod(_args[j].c_str(),tc); }

double * EvtDecayBase::getArgs (   )  [inherited]

{ if ( _argsD ) return _argsD; //The user has asked for a list of doubles - the arguments //better all be doubles... if ( _narg==0 ) return _argsD; _argsD = new double[_narg]; int i; char * tc; for(i=0;i<_narg;i++) { _argsD[i] = strtod(_args[i].c_str(),&tc); } return _argsD; }

std::string* EvtDecayBase::getArgsStr (   )  [inline, inherited]

{return _args;}

std::string EvtDecayBase::getArgStr (  int  j  )  [inline, inherited]

{return _args[j];}

double EvtDecayBase::getBranchingFraction (   )  [inline, inherited]

{return _brfr;}

EvtId EvtDecayBase::getDaug (  int  i  )  [inline, inherited]

{return _daug[i];}

EvtId* EvtDecayBase::getDaugs (   )  [inline, inherited]

{return _daug;}

int EvtDecayBase::getDSum (   )  [inline, inherited]

{return _dsum; }

std::string EvtDecayBase::getModelName (   )  [inline, inherited]

{return _modelname; }

void EvtBtoXsll::getName (  std::string &  name  )  [virtual]

Implements EvtDecayBase. { model_name="BTOXSLL"; }

int EvtDecayBase::getNArg (   )  [inline, inherited]

{return _narg;}

int EvtDecayBase::getNDaug (   )  [inline, inherited]

{return _ndaug;}

EvtId EvtDecayBase::getParentId (   )  [inline, inherited]

{return _parent;}

int EvtDecayBase::getPHOTOS (   )  [inline, inherited]

{return _photos;}

double EvtDecayBase::getProbMax (  double  prob  )  [inherited]

{ int i; //diagnostics sum_prob+=prob; if (prob>max_prob) max_prob=prob; if ( defaultprobmax && ntimes_prob<=500 ) { //We are building up probmax with this iteration ntimes_prob += 1; if ( prob > probmax ) { probmax = prob;} if (ntimes_prob==500) { probmax*=1.2; } return 1000000.0*prob; } if ( prob> probmax*1.0001) { report(INFO,"EvtGen") << "prob > probmax:("<<prob<<">"<<probmax<<")"; report(INFO,"") << "("<<_modelname.c_str()<<") "; report(INFO,"") << EvtPDL::name(_parent).c_str()<<" -> "; for(i=0;i<_ndaug;i++){ report(INFO,"") << EvtPDL::name(_daug[i]).c_str() << " "; } report(INFO,"") << endl; if (defaultprobmax) probmax = prob; } ntimes_prob += 1; return probmax; } //getProbMax

void EvtBtoXsll::init (   )  [virtual]

Reimplemented from EvtDecayBase. { // check that there are no arguments checkNArg(0,4,5); checkNDaug(3); // Check that the two leptons are the same type EvtId lepton1type = getDaug(1); EvtId lepton2type = getDaug(2); int etyp = 0; int mutyp = 0; int tautyp = 0; if ( lepton1type == EvtPDL::getId("e+") || lepton1type == EvtPDL::getId("e-") ) { etyp++;} if ( lepton2type == EvtPDL::getId("e+") || lepton2type == EvtPDL::getId("e-") ) { etyp++;} if ( lepton1type == EvtPDL::getId("mu+") || lepton1type == EvtPDL::getId("mu-") ) { mutyp++;} if ( lepton2type == EvtPDL::getId("mu+") || lepton2type == EvtPDL::getId("mu-") ) { mutyp++;} if ( lepton1type == EvtPDL::getId("tau+") || lepton1type == EvtPDL::getId("tau-") ) { tautyp++;} if ( lepton2type == EvtPDL::getId("tau+") || lepton2type == EvtPDL::getId("tau-") ) { tautyp++;} if ( etyp != 2 && mutyp != 2 && tautyp != 2 ) { report(ERROR,"EvtGen") << "Expect two leptons of the same type in EvtBtoXsll.cc\n"; ::abort(); } // Check that the second and third entries are leptons with positive // and negative charge, respectively int lpos = 0; int lneg = 0; if ( lepton1type == EvtPDL::getId("e+") || lepton1type == EvtPDL::getId("mu+") || lepton1type == EvtPDL::getId("tau+") ) { lpos++;} if ( lepton2type == EvtPDL::getId("e-") || lepton2type == EvtPDL::getId("mu-") || lepton2type == EvtPDL::getId("tau-") ) { lneg++;} if ( lpos != 1 || lneg != 1 ) { report(ERROR,"EvtGen") << "Expect 2nd and 3rd particles to be positive and negative leptons in EvtBtoXsll.cc\n"; ::abort(); } _mb=4.8; _ms=0.2; _mq=0.; _pf=0.41; _mxmin=1.1; if ( getNArg()==4) { // b-quark mass _mb = getArg(0); // s-quark mass _ms = getArg(1); // spectator quark mass _mq = getArg(2); // Fermi motion parameter _pf = getArg(3); } if ( getNArg()==5) { _mxmin = getArg(4); } _calcprob = new EvtBtoXsllUtil; double ml = EvtPDL::getMeanMass(getDaug(1)); // determine the maximum probability density from dGdsProb int i, j; int nsteps = 100; double s = 0.0; double smin = 4.0 * ml * ml; double smax = (_mb - _ms)*(_mb - _ms); double probMax = -10000.0; double sProbMax = -10.0; double uProbMax = -10.0; for (i=0;i<nsteps;i++) { s = smin + (i+0.0005)*(smax - smin)/(double)nsteps; double prob = _calcprob->dGdsProb(_mb, _ms, ml, s); if (prob > probMax) { sProbMax = s; probMax = prob; } } _dGdsProbMax = probMax; if ( verbose() ) { report(INFO,"EvtGen") << "dGdsProbMax = " << probMax << " for s = " << sProbMax << endl; } // determine the maximum probability density from dGdsdupProb probMax = -10000.0; sProbMax = -10.0; for (i=0;i<nsteps;i++) { s = smin + (i+0.0005)*(smax - smin)/(double)nsteps; double umax = sqrt((s - (_mb + _ms)*(_mb + _ms)) * (s - (_mb - _ms)*(_mb - _ms))); for (j=0;j<nsteps;j++) { double u = -umax + (j+0.0005)*(2.0*umax)/(double)nsteps; double prob = _calcprob->dGdsdupProb(_mb, _ms, ml, s, u); if (prob > probMax) { sProbMax = s; uProbMax = u; probMax = prob; } } } _dGdsdupProbMax = probMax; if ( verbose() ) { report(INFO,"EvtGen") << "dGdsdupProbMax = " << probMax << " for s = " << sProbMax << " and u = " << uProbMax << endl; } }

void EvtBtoXsll::initProbMax (   )  [virtual]

Reimplemented from EvtDecayBase. { noProbMax(); }

int EvtDecayIncoherent::isDaughterSpinDensitySet (  int  daughter  )  [inline, inherited]

{return spinDensitySet[daughter];}

void EvtDecayIncoherent::makeDecay (  EvtParticle *  p  )  [virtual, inherited]

Implements EvtDecayBase. { int i; //initialize this the hard way.. //Lange June 26, 2000 for (i=0; i<MAX_DAUG; i++ ) { spinDensitySet[i]=0;} _daugsDecayedByParentModel=false; decay(p); p->setDecayProb(1.); EvtSpinDensity rho; rho.SetDiag(p->getSpinStates()); p->setSpinDensityBackward(rho); if (getPHOTOS() || EvtRadCorr::alwaysRadCorr()) { EvtRadCorr::doRadCorr(p); } //Now decay the daughters. if ( !daugsDecayedByParentModel()) { for(i=0;i<p->getNDaug();i++){ //Need to set the spin density of the daughters to be //diagonal. rho.SetDiag(p->getDaug(i)->getSpinStates()); //if (p->getDaug(i)->getNDaug()==0){ //only do this if the user has not already set the //spin density matrix herself. //Lange June 26, 2000 if ( isDaughterSpinDensitySet(i)==0 ) { p->getDaug(i)->setSpinDensityForward(rho); } else{ //report(INFO,"EvtGen") << "spinDensitymatrix already set!!!\n"; EvtSpinDensity temp=p->getDaug(i)->getSpinDensityForward(); // report(INFO,"EvtGen") <<temp<<endl; } //Now decay the daughter. Really! p->getDaug(i)->decay(); //} } } }

bool EvtDecayBase::matchingDecay (  const EvtDecayBase &  other  )  const [virtual, inherited]

{ if ( _ndaug != other._ndaug) return false; if ( _parent != other._parent) return false; std::vector<int> useDs; for ( unsigned int i=0; i<_ndaug; i++) useDs.push_back(0); for ( unsigned int i=0; i<_ndaug; i++) { bool foundIt=false; for ( unsigned int j=0; j<_ndaug; j++) { if ( useDs[j] == 1 ) continue; if ( _daug[i] == other._daug[j] && _daug[i].getAlias() == other._daug[j].getAlias()) { foundIt=true; useDs[j]=1; break; } } if ( foundIt==false) return false; } for ( unsigned int i=0; i<_ndaug; i++) if ( useDs[i]==0) return false; return true; }

void EvtDecayBase::noProbMax (   )  [inherited]

{ defaultprobmax=0; }

virtual int EvtDecayBase::nRealDaughters (   )  [inline, virtual, inherited]

Reimplemented in EvtBtoKD3P, and EvtVSSBMixCPT. { return _ndaug;}

void EvtDecayBase::printSummary (   )  [inherited]

{ int i; if (ntimes_prob>0) { report(INFO,"EvtGen") << "Calls="<<ntimes_prob<<" eff:"<< sum_prob/(probmax*ntimes_prob)<<" frac. max:"<<max_prob/probmax; report(INFO,"") <<" probmax:"<<probmax<<" max:"<<max_prob<<" : "; } report(INFO,"") << EvtPDL::name(_parent).c_str()<<" -> "; for(i=0;i<_ndaug;i++){ report(INFO,"") << EvtPDL::name(_daug[i]).c_str() << " "; } report(INFO,"") << " ("<<_modelname.c_str()<<"):"<< endl; }

double EvtDecayBase::resetProbMax (  double  prob  )  [inherited]

{ report(INFO,"EvtGen") << "Reseting prob max\n"; report(INFO,"EvtGen") << "prob > probmax:("<<prob<<">"<<probmax<<")"; report(INFO,"") << "("<<_modelname.c_str()<<")"; report(INFO,"") << EvtPDL::getStdHep(_parent)<<"->"; for( int i=0;i<_ndaug;i++){ report(INFO,"") << EvtPDL::getStdHep(_daug[i]) << " "; } report(INFO,"") << endl; probmax = 0.0; defaultprobmax = 0; ntimes_prob = 0; return prob; }

void EvtDecayBase::saveDecayInfo (  EvtId  ipar, int  ndaug, EvtId *  daug, int  narg, std::vector< std::string > &  args, std::string  name, double  brfr )  [inherited]

{ int i; _brfr=brfr; _ndaug=ndaug; _narg=narg; _parent=ipar; _dsum=0; if (_ndaug>0) { _daug=new EvtId [_ndaug]; for(i=0;i<_ndaug;i++){ _daug[i]=daug[i]; _dsum+=daug[i].getAlias(); } } else{ _daug=0; } if (_narg>0) { _args=new std::string[_narg+1]; for(i=0;i<_narg;i++){ _args[i]=args[i]; } } else{ _args = 0; } _modelname=name; this->init(); this->initProbMax(); if (_chkCharge){ this->checkQ(); } if (defaultprobmax){ report(INFO,"EvtGen") << "No default probmax for "; report(INFO,"") << "("<<_modelname.c_str()<<") "; report(INFO,"") << EvtPDL::name(_parent).c_str()<<" -> "; for(i=0;i<_ndaug;i++){ report(INFO,"") << EvtPDL::name(_daug[i]).c_str() << " "; } report(INFO,"") << endl; report(INFO,"") << "This is fine for development, but must be provided for production."<<endl; report(INFO,"EvtGen") << "Never fear though - the decay will use the \n"; report(INFO,"EvtGen") << "500 iterations to build up a good probmax \n"; report(INFO,"EvtGen") << "before accepting a decay. "<<endl; } }

void EvtDecayIncoherent::setDaughterSpinDensity (  int  daughter  )  [inline, inherited]

{ spinDensitySet[daughter]=1; return;}

void EvtDecayBase::setPHOTOS (   )  [inline, inherited]

{_photos=1;}

void EvtDecayBase::setProbMax (  double  prbmx  )  [inherited]

{ defaultprobmax=0; probmax=prbmx; }

void EvtDecayBase::setSummary (   )  [inline, inherited]

{_summary=1;}

void EvtDecayBase::setVerbose (   )  [inline, inherited]

{_verbose=1;}

int EvtDecayBase::summary (   )  [inline, inherited]

{return _summary; }

int EvtDecayBase::verbose (   )  [inline, inherited]

{return _verbose; }

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Member Data Documentation

EvtBtoXsllUtil* EvtBtoXsll::_calcprob [private]

bool EvtDecayBase::_daugsDecayedByParentModel [protected, inherited]

double EvtBtoXsll::_dGdsdupProbMax [private]

double EvtBtoXsll::_dGdsProbMax [private]

double EvtBtoXsll::_mb [private]

double EvtBtoXsll::_mq [private]

double EvtBtoXsll::_ms [private]

double EvtBtoXsll::_mxmin [private]

double EvtBtoXsll::_pf [private]

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

• /data0/mdestefa/bes3soft/Boss_6.5.5/dist/6.5.5/Generator/BesEvtGen/BesEvtGen-00-01-11/src/EvtGen/EvtGenModels/EvtBtoXsll.hh
• /data0/mdestefa/bes3soft/Boss_6.5.5/dist/6.5.5/Generator/BesEvtGen/BesEvtGen-00-01-11/src/EvtGen/EvtGenModels/EvtBtoXsll.cc

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