EvtMultibody Class Reference

#include <EvtMultibody.hh>

Inheritance diagram for EvtMultibody:

Public Member Functions
	EvtMultibody ()
virtual	~EvtMultibody ()
void	getName (std::string &name)
EvtDecayBase *	clone ()
void	init ()
void	initProbMax ()
void	decay (EvtParticle *p)
Public Member Functions inherited from EvtDecayAmp
void	makeDecay (EvtParticle *p)
void	setWeight (double weight)
void	vertex (const EvtComplex &amp)
void	vertex (int i1, const EvtComplex &amp)
void	vertex (int i1, int i2, const EvtComplex &amp)
void	vertex (int i1, int i2, int i3, const EvtComplex &amp)
void	vertex (int *i1, const EvtComplex &amp)
virtual	~EvtDecayAmp ()
Public Member Functions inherited from EvtDecayBase
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 ()

Additional Inherited Members
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)
Protected Member Functions inherited from EvtDecayBase
bool	daugsDecayedByParentModel ()
Protected Attributes inherited from EvtDecayAmp
EvtAmp	_amp2
Protected Attributes inherited from EvtDecayBase
bool	_daugsDecayedByParentModel

Detailed Description

Definition at line 10 of file EvtMultibody.hh.

Constructor & Destructor Documentation

EvtMultibody()

EvtMultibody::EvtMultibody ( )

inline

Definition at line 13 of file EvtMultibody.hh.

{ _decayTree = NULL; }

Referenced by clone().

~EvtMultibody()

EvtMultibody::~EvtMultibody ( )

virtual

Definition at line 13 of file EvtMultibody.cc.

{
    if( _decayTree != NULL ) delete _decayTree;
    _decayTree=NULL;
}

Member Function Documentation

clone()

EvtDecayBase * EvtMultibody::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 24 of file EvtMultibody.cc.

{
    return new EvtMultibody;
}

decay()

void EvtMultibody::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 54 of file EvtMultibody.cc.

{
    // Initialize the phase space before doing anything else!
    p->initializePhaseSpace(getNDaug(),getDaugs());
    std::vector<EvtVector4R> product;
 
    for(int i=0; i<getNDaug(); ++i) 
        product.push_back(p->getDaug(i)->getP4Lab());
 
    EvtSpinAmp amp = _decayTree->amplitude( product );
 
    int * ilist = new int[amp.rank()];
    
    // Set up the rotation matrix for the root particle
    EvtSpinDensity R = p->rotateToHelicityBasis();
 
    EvtSpinType::spintype type = EvtPDL::getSpinType(getParentId());
    int twospin = EvtSpinType::getSpin2( EvtPDL::getSpinType(getParentId()) );
    
    std::vector<EvtSpinType::spintype> types(2, type);
    EvtSpinAmp newamp( types, EvtComplex(0.0, 0.0) );
    std::vector<int> index = newamp.iterallowedinit();
    do {
        newamp(index) = R.Get((index[0]+twospin)/2,(index[1]+twospin)/2);
    } while( newamp.iterateallowed( index ) );
 
    newamp.extcont(amp, 1, 0);
    amp=newamp;
 
    index = amp.iterallowedinit();
    std::vector<int> spins = amp.dims();
    
    do {
        for( int i=0; i<index.size(); ++i ) {
            ilist[i]=index[i]+spins[i];
        }
        
        vertex( ilist, amp( index ) );
    } while( amp.iterateallowed( index ) );
 
    delete [] ilist;
}

getName()

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

virtual

Implements EvtDecayBase.

Definition at line 19 of file EvtMultibody.cc.

{
    model_name = "D_MULTIBODY";
}

init()

void EvtMultibody::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 29 of file EvtMultibody.cc.

{
    int N = getNArg();
 
    _decayTree = new EvtMTree( getDaugs(), getNDaug() );
 
    for(int i=0; i<N-1; ++i) {
        if(getArgStr( i )=="RESONANCE") {
            _decayTree->addtree( getArgStr( ++i ) );
        } else {
            report(ERROR,"EvtGen")
                << "Syntax error at " << getArgStr( i ) << std::endl;
            ::abort();
        }
    }
}

initProbMax()

void EvtMultibody::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 49 of file EvtMultibody.cc.

{
    // setProbMax(1.0);
}

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

• EvtMultibody.hh
• EvtMultibody.cc