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VVS Class Reference

#include <EvtVVS.hh>

List of all members.

Public Member Functions

double amps ()
EvtComplex amps1 (int m, int i, int j)
double Fij (int i, int j, double r)
double R00 (double r)
 VVS (EvtVector4R pd1, EvtVector4R pd2, EvtVector4R pd3, double ResonanceMass, double ResonanceWidth, double r1, double r2, double phase1, double phase2)

Private Attributes

double _par [5]
EvtVector4R _pd [5]
double _res [5]

Constructor & Destructor Documentation

VVS::VVS (  EvtVector4R  pd1,
EvtVector4R  pd2,
EvtVector4R  pd3,
double  ResonanceMass,
double  ResonanceWidth,
double  r1,
double  r2,
double  phase1,
double  phase2
)  [inline]
  

00037                                                                                                                                                   {
00039 //     For the decay 1-- -->R(1--) +Pseudoscalar-->3 Pseudoscalars
00040 //  pd1,pd2,pd3: four momentum vector for three daughters
00041 //   ResonanceMass,  ResonanceWidth : resonance parameter for intermediate state R(1--)
00042 //  r1,r2      : the relative coupling strength for two resonaces R R.P.T another R
00043 //  phase1,phase2: the relatev phase of two phases R.P.T another R
00045  _pd[0]=pd1;
00046  _pd[1]=pd2;
00047  _pd[2]=pd3;
00048  _res[0]=ResonanceMass;
00049  _res[1]=ResonanceWidth;
00050  _par[0]=r1;
00051  _par[1]=phase1;
00052  _par[2]=r2;
00053  _par[3]=phase2;
00054  }

Member Function Documentation

double VVS::amps (   ) 
  

00071                  {
00072  double r1=_par[0];
00073  double phase1=_par[1];
00074  double r2=_par[2];
00075  double phase2=_par[3];
00076  double temp=0.0;
00077  int m;
00078  for(m=-1;m<=1;m+=2) temp=temp+pow(abs(r1*exp(EvtComplex(0,phase1))*amps1(m,0,1)+r2*exp(EvtComplex(0,phase2))*amps1(m,0,2)+amps1(m,1,2)),2.);
00079  return temp;
00080  }

EvtComplex VVS::amps1 (  int  m,
int  i,
int  j
) 
  

00049                                            {
00050    double mrho=_res[0];
00051    double wrho=_res[1];
00052    double s;
00053    EvtComplex img(0.0,1.0),dpro;
00054    EvtVector4R prho;
00055    prho=_pd[i]+_pd[j];
00056    s=prho.mass2();
00057    dpro=s-mrho*mrho+img*sqrt(s)*wrho;
00058    EvtHelSys angles(prho,_pd[i]),labAngles;
00059    double theta,phi,ct1,st1,phi1,st,ct;
00060    double rpp=angles.getHelAng(0);
00061    theta=angles.getHelAng(1);
00062    phi  =angles.getHelAng(2);
00063    ct1 =labAngles.Angles(prho,1);
00064    phi1=labAngles.Angles(prho,2);
00065    int lamb;
00066    EvtComplex temp(0.0,0.0);
00067    for(lamb=-1;lamb<=1;lamb++) temp=temp+Fij(lamb,0,prho.d3mag())*Djmn(1,m,lamb,phi1,ct1,0.0)/dpro*R00(rpp)*Djmn(1,lamb,0,phi,theta,0.0); 
00068     return temp;
00069   }

double VVS::Fij (  int  i,
int  j,
double  r
) 
  

00040                                         {
00041    double mpsi=(_pd[0]+_pd[1]+_pd[2]).mass();
00042    double temp=mpsi*r;
00043    if(i==0&& j==0) return 0;
00044    if(i==1&& j==0) return temp;
00045    if(i==-1&& j==0) return -temp;
00046  
00047   }

double VVS::R00 (  double  r  ) 
  

00036                          {
00037   return r;
00038   }

Member Data Documentation

double VVS::_par[5] [private]
 

EvtVector4R VVS::_pd[5] [private]
 

double VVS::_res[5] [private]
 

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