#include <EvtCalHelAmp.hh>

Inheritance diagram for EvtCalHelAmp:

Public Member Functions
	EvtCalHelAmp ()

virtual	~EvtCalHelAmp ()

void	getName (std::string &name)

EvtDecayBase *	clone ()

void	initProbMax ()

void	init ()

void	decay (EvtParticle *p)

std::vector< double >	firstder (std::vector< double > vh)

double	getBlattRatio (int L, double R, double pmag, double pmag0)

double	blattfactor (int L, double R, double pmag)

double	phsp (double m0, double m1, double m2)

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 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 Attributes
static double	_H2 =0

static double	_H1 =0

static double	_H0 =0

static double	_H2err =0

static double	_H1err =0

static double	_H0err =0

static int	nevt =0

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 EvtDecayBase
bool	_daugsDecayedByParentModel

Detailed Description

Definition at line 42 of file EvtCalHelAmp.hh.

Constructor & Destructor Documentation

◆ EvtCalHelAmp()

EvtCalHelAmp::EvtCalHelAmp ( )

inline

Definition at line 46 of file EvtCalHelAmp.hh.

46{}

Referenced by clone().

◆ ~EvtCalHelAmp()

EvtCalHelAmp::~EvtCalHelAmp ( )

virtual

Definition at line 38 of file EvtCalHelAmp.cc.

38{}

Member Function Documentation

◆ blattfactor()

double EvtCalHelAmp::blattfactor	(	int	L,
		double	R,
		double	pmag )

Definition at line 182 of file EvtCalHelAmp.cc.

                                                            {//pmag is the magnitude of one daughter particle, instead of difference of momentum between two daugs.
  double rp = R*pmag;
  double rp2 = rp*rp;
  double rp4 = rp2*rp2;
  double rp6 = rp2 * rp4;
  double rp8 = rp4 * rp4;
  switch (L){
  case 0:
    return 1.0;
    break;
  case 1:
    return 1.0/sqrt(1+R*R*pmag*pmag);
    break;
  case 2:
    return 1.0/sqrt(1+rp2/3.+rp4/9.);
    break;
  case 3:
    return 1.0/sqrt(225 + 45*rp2 + 6*rp4 + rp6 );
    break;
  case 4:
    return 1.0/sqrt(11025 + 1575*rp2 + 135*rp4 + 10*rp6 + rp8 );
    break;
  default:
    cout<<"lineshape::blattfactor: No expression for L>4 is availabe."<<endl;
    ::abort();
  }
 
}

Referenced by getBlattRatio().

◆ clone()

EvtDecayBase * EvtCalHelAmp::clone ( )

virtual

Implements EvtDecayBase.

Definition at line 46 of file EvtCalHelAmp.cc.

                                 {
 
  return new EvtCalHelAmp;
 
}

◆ decay()

void EvtCalHelAmp::decay ( EvtParticle * p )

virtual

Implements EvtDecayBase.

Definition at line 78 of file EvtCalHelAmp.cc.

                                        {
  if(getNArg()!=4) {cout<<"The model have 6 parameters: |g00| phi00 |g22| phi22 |g42| phi42"<<endl; abort();}
 
  double weight = p->initializePhaseSpace(getNDaug(),getDaugs());
  //  std::cout<<"weight= "<<weight<<std::endl;
  //std::cout<<p->getP4().mass()<<" "<<p->getDaug(0)->getP4().mass()<<" "<<p->getDaug(1)->getP4().mass()<<std::endl;
  std::string p0str=EvtPDL::name(p->getId());
  std::string p1str=EvtPDL::name(p->getDaug(0)->getId());
  std::string p2str=EvtPDL::name(p->getDaug(1)->getId());
  if(p1str=="K_2*+" || p2str=="K_2*+" ||p1str=="K_2*0" || p2str=="K_2*0" ) {flag=2;} else
  if(p1str=="K_3*+" || p2str=="K_3*+" ||p1str=="K_3*0" || p2str=="K_3*0" ) {flag=3;} else
  if(p1str=="Zc+"   || p2str=="pi-"   ||p1str=="Zc-"   || p2str=="pi^+"  ) {flag=4;} else
  if(p0str=="Zc+"   && (p1str=="J/psi" || p2str=="J/psi")  ) {flag=5;} 
  //Helicity amplitude for 2+ -> VP
  EvtVector4R p1= p->getDaug(0)->getP4();
  double r= 2*p1.d3mag();  //to be consistent with PWA HelAmp.cc
  double R=3.0;
  double pi=3.1415926;
  double mm0=EvtPDL::getMeanMass(p->getId());
  double mm1=EvtPDL::getMeanMass(p->getDaug(0)->getId());
  double mm2=EvtPDL::getMeanMass(p->getDaug(1)->getId());
  double pmag=phsp(mm0,mm1,mm2);//for normalization Blatt factor, momentum without factor 2, consistent with the PWA HelAmp.cc
  double b0=getBlattRatio(0,R,r,pmag);
  double b1=getBlattRatio(1,R,r,pmag);
  double b2=getBlattRatio(2,R,r,pmag);
  double b3=getBlattRatio(3,R,r,pmag);
  double b4=getBlattRatio(4,R,r,pmag);
  //std::cout<<"b0,b1,b2,b3,b4 "<<b0<<" "<<b1<<" "<<b2<<" "<<b3<<" "<<b4<<std::endl;    
  double g02   = getArg(0);
  double phi02 = getArg(1)*2*pi;
  double g22 =   getArg(2);
  double phi22 = getArg(3)*2*pi;
  //double g42 =   getArg(4);
  //double phi42 = getArg(5)*2*pi;
  EvtComplex G02(g02*cos(phi02),g02*sin(phi02));
  EvtComplex G22(g22*cos(phi22),g22*sin(phi22));
  //EvtComplex G42(g42*cos(phi42),g42*sin(phi42));
  std::vector<EvtComplex> VG; VG.clear();
  VG.push_back(G02); VG.push_back(G22);// VG.push_back(G42);
  std::vector<double> VH2,VH1,VH0;
  VH2.resize(nd/2);VH1.resize(nd/2);VH0.resize(nd/2);
  if(flag==2){
    VH2[0]=sqrt(2./5.)*b1*r;  VH2[1]= 1/sqrt(10.)*r*r*r*b3; 
    VH1[0]=-1/sqrt(10.)*b1*r; VH1[1]= r*r*r*b3*sqrt(2./5.);
  }else if(flag==3){
    VH2[0]=sqrt(5./14.)*b2*r*r;  VH2[1]= 1/sqrt(7.)*r*r*r*r*b4; 
    VH1[0]=sqrt(1./7.)*b2*r*r;   VH1[1]= -sqrt(5./14.)*r*r*r*r*b4;
  }else if(flag==4 || flag==5){
    VH2[0]=sqrt(1./3.)*b0;  VH2[1]= 1/sqrt(6.)*r*r*b2; 
    VH1[0]=sqrt(1./3.)*b0;  VH1[1]=-2/sqrt(6.)*r*r*b2;
  }else{std::cout<<"Not allowed mode!"<<std::endl; abort();}
  EvtComplex H2 = G02*VH2[0] + G22*VH2[1];
  EvtComplex H1 = G02*VH1[0] + G22*VH1[1];
  
  _H2 += abs2(H2); _H1 += abs2(H1); 
  std::vector<double> DH1,DH2;
  DH2=firstder(VH2);
  DH1=firstder(VH1);
 
  // std::cout<<DH2[0]<<" "<<DH2[1]<<" "<<DH2[2]<<" "<<DH2[3]<<std::endl;
  //std::cout<<DH1[0]<<" "<<DH1[1]<<" "<<DH1[2]<<" "<<DH1[3]<<std::endl;
 
  for(int i=0;i<nd;i++){
    for(int j=0;j<nd;j++){
      _H2err += DH2[i]*DH2[j]*VC[i][j]; 
      _H1err += DH1[i]*DH1[j]*VC[i][j];
    }
  }
  
  nevt++;
 
  return ;
}

◆ firstder()

std::vector< double > EvtCalHelAmp::firstder ( std::vector< double > vh )

Definition at line 153 of file EvtCalHelAmp.cc.

                                                            {
  // vh: vector of helicity part
  double pi=3.1415926;
  std::vector<double> fd;
  double g02 =   getArg(0);
  double phi02 = getArg(1)*2*pi;
  double g22 =   getArg(2);
  double phi22 = getArg(3)*2*pi;
  std::vector<double> vpar;
  vpar.push_back(g02);vpar.push_back(phi02);vpar.push_back(g22);vpar.push_back(phi22);
  EvtComplex G02(vpar[0]*cos(vpar[1]),vpar[0]*sin(vpar[1]));
  EvtComplex G22(vpar[2]*cos(vpar[3]),vpar[2]*sin(vpar[3]));
  EvtComplex H20 = G02*vh[0] + G22*vh[1];
  double hamps0 = abs2(H20);
  for(int i=0;i<vpar.size();i++){
    vpar.clear();
    vpar.push_back(g02);vpar.push_back(phi02);vpar.push_back(g22);vpar.push_back(phi22);
    double dev=0.01;
    vpar[i] += dev;
    EvtComplex G02(vpar[0]*cos(vpar[1]),vpar[0]*sin(vpar[1]));
    EvtComplex G22(vpar[2]*cos(vpar[3]),vpar[2]*sin(vpar[3]));
    EvtComplex H20 = G02*vh[0] + G22*vh[1];
    double hamps2=abs2(H20);
    double xder=(hamps2-hamps0)/dev; 
    fd.push_back(xder);
  }
  return fd;
}

Referenced by decay().

◆ getBlattRatio()

double EvtCalHelAmp::getBlattRatio	(	int	L,
		double	R,
		double	pmag,
		double	pmag0 )

Definition at line 212 of file EvtCalHelAmp.cc.

                                                                           {
  double blattRatio = blattfactor(L,R,pmag)/blattfactor(L,R,pmag0);
  return blattRatio;
}

Referenced by decay().

◆ getName()

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

virtual

Implements EvtDecayBase.

Definition at line 40 of file EvtCalHelAmp.cc.

                                               {
 
  model_name="CALHELAMP";     
 
}

◆ init()

void EvtCalHelAmp::init ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 53 of file EvtCalHelAmp.cc.

                       {
  _H2=0;_H1=0;_H0=0;_H2err=0;_H1err=0;_H0err=0;nevt=0;
  // check that there are 1 arguments (the number of parameters)
  checkNArg(4);
  nd=getNArg();
  VC.resize(nd); 
  for(int i=0;i<nd;i++) VC[i].resize(nd);
  ifstream coverrf("myerr.dat");
  if(coverrf==0) {std::cout<<"File of covariant error (myerr.dat)" <<" is not found"<<endl;abort();}
  for(int i=0;i<nd;i++){
    for(int j=0;j<nd;j++){
      double xr;
      coverrf>>xr;
      VC[i][j]=xr;
    }
  }
 
}

◆ initProbMax()

void EvtCalHelAmp::initProbMax ( )

virtual

Reimplemented from EvtDecayBase.

Definition at line 72 of file EvtCalHelAmp.cc.

                              {
 
  noProbMax();
 
}

◆ phsp()

double EvtCalHelAmp::phsp	(	double	m0,
		double	m1,
		double	m2 )

Definition at line 217 of file EvtCalHelAmp.cc.

                                                       {  //phase space for m0->m1 + m2
     if(m1+m2>m0) {cout<<"HelAmp::phsp: m1("<<m1<<") + m2("<<m2<<") > m0("<<m0<<") "<<endl;::abort();}
     //if(m1+m2>m0) {return 0;}
     double m0s = m0*m0;
     double m12 =(m1+m2);
     double m12s = m12*m12;
     double md12 = m1-m2;
     double md12s=md12*md12;
 
     double pmag = sqrt( fabs( (m0s-m12s)*(m0s-md12s) ) )/2/m0;
  
     //-- for debugging
     // cout<<m0<<" ->"<<m1<<" + "<<m2<<", pmag= "<<pmag<<endl;
       return pmag;
 } 

Referenced by decay().

Member Data Documentation

◆ _H0

double EvtCalHelAmp::_H0 =0

static

Definition at line 58 of file EvtCalHelAmp.hh.

Referenced by EvtDecay::finalize(), and init().

◆ _H0err

double EvtCalHelAmp::_H0err =0

static

Definition at line 58 of file EvtCalHelAmp.hh.

Referenced by EvtDecay::finalize(), and init().

◆ _H1

double EvtCalHelAmp::_H1 =0

static

Definition at line 58 of file EvtCalHelAmp.hh.

Referenced by decay(), EvtDecay::finalize(), and init().

◆ _H1err

double EvtCalHelAmp::_H1err =0

static

Definition at line 58 of file EvtCalHelAmp.hh.

Referenced by decay(), EvtDecay::finalize(), and init().

◆ _H2

double EvtCalHelAmp::_H2 =0

static

Definition at line 58 of file EvtCalHelAmp.hh.

Referenced by decay(), EvtDecay::finalize(), and init().

◆ _H2err

double EvtCalHelAmp::_H2err =0

static

Definition at line 58 of file EvtCalHelAmp.hh.

Referenced by decay(), EvtDecay::finalize(), and init().

◆ nevt

int EvtCalHelAmp::nevt =0

static

Definition at line 59 of file EvtCalHelAmp.hh.

Referenced by decay(), EvtDecay::finalize(), and init().

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

Public Member Functions

Static Public Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ EvtCalHelAmp()

◆ ~EvtCalHelAmp()

Member Function Documentation

◆ blattfactor()

◆ clone()

◆ decay()

◆ firstder()

◆ getBlattRatio()

◆ getName()

◆ init()

◆ initProbMax()

◆ phsp()

Member Data Documentation

◆ _H0

◆ _H0err

◆ _H1

◆ _H1err

◆ _H2

◆ _H2err

◆ nevt