EvtPto3P Class Reference

#include <EvtPto3P.hh>

Inheritance diagram for EvtPto3P:

Public Member Functions
	EvtPto3P ()
virtual	~EvtPto3P ()
void	getName (std::string &model_name)
EvtDecayBase *	clone ()
virtual EvtAmpFactory< EvtDalitzPoint > *	createFactory (const EvtMultiChannelParser &parser)
virtual std::vector< EvtVector4R >	initDaughters (const EvtDalitzPoint &p) const
EvtDalitzPlot	dp ()
Public Member Functions inherited from EvtIntervalDecayAmp< EvtDalitzPoint >
	EvtIntervalDecayAmp ()
	EvtIntervalDecayAmp (const EvtIntervalDecayAmp< EvtDalitzPoint > &other)
virtual	~EvtIntervalDecayAmp ()
virtual void	init ()
virtual void	initProbMax ()
virtual void	decay (EvtParticle *p)
const EvtDalitzPoint &	x () const
EvtComplex	amplNonCP (const EvtDalitzPoint &x)
EvtPdfSum< EvtDalitzPoint > *	getPC ()
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 EvtIntervalDecayAmp< EvtDalitzPoint >
double	_probMax
int	_nScan
EvtDalitzPoint	_x
EvtAmpFactory< EvtDalitzPoint > *	_fact
Protected Attributes inherited from EvtDecayAmp
EvtAmp	_amp2
Protected Attributes inherited from EvtDecayBase
bool	_daugsDecayedByParentModel

Detailed Description

Definition at line 26 of file EvtPto3P.hh.

Constructor & Destructor Documentation

EvtPto3P()

EvtPto3P::EvtPto3P ( )

inline

Definition at line 30 of file EvtPto3P.hh.

{}

Referenced by clone().

~EvtPto3P()

virtual EvtPto3P::~EvtPto3P ( )

inlinevirtual

Definition at line 31 of file EvtPto3P.hh.

{}

Member Function Documentation

clone()

EvtDecayBase * EvtPto3P::clone ( )

inlinevirtual

Implements EvtDecayBase.

Definition at line 33 of file EvtPto3P.hh.

{ return new EvtPto3P(); } 

createFactory()

EvtAmpFactory< EvtDalitzPoint > * EvtPto3P::createFactory ( const EvtMultiChannelParser & parser )

virtual

Implements EvtIntervalDecayAmp< EvtDalitzPoint >.

Definition at line 45 of file EvtPto3P.cc.

{
  // Compute the interval size
 
  EvtDalitzPlot plot = dp();
  EvtAmpFactory<EvtDalitzPoint>* fact = new EvtPto3PAmpFactory(plot);
  fact->build(parser,10000);
  return fact;
}

dp()

EvtDalitzPlot EvtPto3P::dp

(

)

Definition at line 24 of file EvtPto3P.cc.

{
  // There must be 3 daughters. All particles must be pseudoscalars.
  // Charge must be conserved. Number of arguments must be non-zero.
 
  EvtId parent = getParentId();
  assert(getNDaug() == 3);
  EvtId dau0 = getDaug(0);
  EvtId dau1 = getDaug(1);
  EvtId dau2 = getDaug(2);
  
  assert(EvtPDL::getSpinType(parent) == EvtSpinType::SCALAR);
  assert(EvtPDL::getSpinType(dau0) == EvtSpinType::SCALAR);
  assert(EvtPDL::getSpinType(dau1) == EvtSpinType::SCALAR);
  assert(EvtPDL::getSpinType(dau2) == EvtSpinType::SCALAR);  
  assert(EvtPDL::chg3(parent) == EvtPDL::chg3(dau0) + EvtPDL::chg3(dau1) + EvtPDL::chg3(dau2));
  assert(getNArg() > 0);
 
  return EvtDalitzPlot(EvtPDL::getMass(dau0),EvtPDL::getMass(dau1),EvtPDL::getMass(dau2),EvtPDL::getMass(parent));
}

Referenced by createFactory().

getName()

void EvtPto3P::getName ( std::string & model_name )

inlinevirtual

Implements EvtDecayBase.

Definition at line 32 of file EvtPto3P.hh.

{ model_name="PTO3P"; }

Referenced by EvtBtoKD3P::decay().

initDaughters()

std::vector< EvtVector4R > EvtPto3P::initDaughters ( const EvtDalitzPoint & p ) const

virtual

Implements EvtIntervalDecayAmp< EvtDalitzPoint >.

Definition at line 56 of file EvtPto3P.cc.

{
  std::vector<EvtVector4R> v;
  assert(x.isValid());
  
  // Calculate in the r.f. of AB
                                                                              
  double eA = x.e(A,AB);
  double eB = x.e(B,AB);
  double eC = x.e(C,AB);
  double pA = x.p(A,AB);
  double pC = x.p(C,AB);
  double cos = x.cosTh(CA,AB);
  double sin = sqrt(1.0-cos*cos);
                                                                                  
  EvtVector4R vA(eA,0,0,pA);                                                   
  EvtVector4R vB(eB,0,0,-pA); 
  EvtVector4R vC(eC,0,pC*sin,pC*cos);
 
  // Boost from rest frame of AB to rest-frame of decaying particle
  // vboost is the 4-momentum of frame being boosted from in the frame
  // being boosted into.
 
  EvtVector4R vboost = vA + vB + vC;
  vboost.set(1,-vboost.get(1));
  vboost.set(2,-vboost.get(2));
  vboost.set(3,-vboost.get(3));
  vA.applyBoostTo(vboost);
  vB.applyBoostTo(vboost);
  vC.applyBoostTo(vboost);
  
  // Rotate
                                                                                
  double alpha = EvtRandom::Flat( EvtConst::twoPi );
  double beta = acos(EvtRandom::Flat( -1.0, 1.0 ));
  double gamma = EvtRandom::Flat( EvtConst::twoPi );
                                                                                
  vA.applyRotateEuler( alpha, beta, gamma );
  vB.applyRotateEuler( alpha, beta, gamma );
  vC.applyRotateEuler( alpha, beta, gamma );
                                                                                 
   // Fill vector
                                                                                 
  assert(v.size() == 0);  
  v.push_back(vA);
  v.push_back(vB);
  v.push_back(vC);
 
  return v;
}                                                                             

Referenced by EvtBtoKD3P::decay().

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

• EvtPto3P.hh
• EvtPto3P.cc