C++ Flavour::Width方法代码示例

double Soft_Cluster_Handler::
TransformKin(const double MC,const Flavour & flav,const bool & enforce) {
  double mass2(sqr(flav.HadMass()));
  double width2(sqr(Max(flav.Width(),1.e-6)));
  if (!enforce && sqr(MC*MC-mass2)>10.*mass2*width2) return 0.;
  return
    pow(sqr(mass2)/(sqr(MC*MC-mass2) + mass2*width2),m_kappa) * 
    pow(mass2*width2/(sqr(MC*MC-mass2) + mass2*width2),m_lambda);
}

T3Channel::T3Channel(int _nin,int _nout,Flavour * fl,Flavour res) 
{  
  nin  = _nin; 
  nout = _nout;
  ms   = new double[nin+nout];
  for (int i=0;i<nin+nout;i++) ms[i] = ATOOLS::sqr(fl[i].Mass());
  rannum = 3*nout-4;
  rans   = new double[rannum];
  s      = smax  = pt2max = sqr(ATOOLS::rpa->gen.Ecms());
  pt2min = 0.0;
  E      = 0.5 * sqrt(s);
  name   = "T3-Channel";
  if (nout>2) name   = ToString(nin)+"->"+ToString(nout)+"_"+name;
  mass   = width = 0.; 
  type   = 0;
  if (res!=Flavour(kf_none)) {
    mass = res.Mass(); width = res.Width(); type = 1;
  }
  p_vegas = new Vegas(rannum,100,name,0);
}

Decay2Channel::Decay2Channel(int _nin,int _nout,const Flavour * fl,Flavour res) 
{  
  if (_nout != 2 || _nin!=1) {
    msg_Error()<<"Tried to initialize Decay2Channel with nout = "<<_nin<<" -> "<<_nout<<endl;
    abort();
  }
  nin  = _nin; nout = _nout;
  ms   = new double[nin+nout];
  for (short int i=0;i<nin+nout;i++) ms[i] = ATOOLS::sqr(fl[i].Mass());
  rannum = 2;
  rans   = new double[rannum];

  s      = smax  = pt2max = sqr(ATOOLS::rpa->gen.Ecms());
  pt2min = 0.;
  E      = 0.5 * sqrt(s);
  name   = "Decay2-Channel";
  mass   = width = 0.; 
  type   = 0;
  if (res!=Flavour(kf_none)) {
    mass = res.Mass(); width = res.Width(); type = 1;
  }
}

void Channel_Generator_Decays::GenerateMasses(int flag,Point** _plist,int pcount,
				       int& rannum,ofstream& sf)
{
  string * lm    = new string[pcount];
  string * momp  = new string[pcount];
  int    * sflag = new int[pcount];
  string mummy;
  string sum_s_i;
  string help;
  for (short int i=0;i<pcount;i++) {
    lm[i] = LinkedMasses(_plist[i]);
    mummy += lm[i];
    if (_plist[i]->left==0) {
      if (flag==0 || flag==10) AddToVariables(flag,lm[i],string("ms[")+GetMassIndex(lm[i])+string("]"),0,sf);
      //sf<<"  double s"<<lm[i]<<" = ms["<<lm[i]<<"];"<<endl;
      momp[i]  = string("p[") + GetMassIndex(lm[i]) + string("]");
      sflag[i] = 1;
      //sum_s_i  += string("-sqrt(s")+lm[i]+string(")");
      help    += lm[i];
    }
    else {
      CalcSmin(flag,"min",lm[i],sf,_plist[i]);
      momp[i]  = string("p") + Order(lm[i]);
      sflag[i] = 0;
    }
  }
  if (help.length()>0) {
    //CalcSmin(flag,"restmin",help,sf,0);
    //sum_s_i = string("-sqrt(s")+Order(help)+string("_restmin)");
    CalcSmin(flag,"min",help,sf,0);
    sum_s_i = string("-sqrt(s")+Order(help)+string("_min)");
  }
  int hit;
  double maxpole;
  double res;
  Flavour flav;
  string smax;
  for (;;) {
    hit = -1;
    maxpole = -1.;
    for (short int j=0;j<pcount;j++) {
      if (sflag[j]==0) {
	flav = _plist[j]->fl;
	res  = ATOOLS::sqr(flav.Width()*flav.Mass());
	if (!ATOOLS::IsZero(res) && Massive(flav)) {
	  if (1./res>maxpole) {
	    maxpole = 1./res;
	    hit = j;
	  }
	}
	else {
	  if (hit==-1) hit = j;
	}
      }
    }
    if (hit==-1) break;
    smax = string("sqr(sqrt(s")+Order(mummy)+string(")")+sum_s_i;
    
    for (short int j=0;j<pcount;j++) {
      if (sflag[j]==0 && j!=hit) {
	smax  += string("-sqrt(s")+Order(lm[j])+string("_min)");
      }
    }
    smax += string(")");
    
    AddToVariables(flag,lm[hit] +string("_max"),smax,0,sf);
    //sf<<"  double s"<<Order(lm[hit])<<"_max = "<<smax<<endl;

    int hi = 0;
    if (maxpole>0.) {
      hi = (_plist[hit]->fl).Kfcode();
      if (flag>=0) sf<<"  Flavour fl"<<lm[hit]<<" = "<<"Flavour((kf_code)("<<hi<<"));"<<endl;
    } 
    switch (flag) {
    case -11: case -1:
      if (maxpole>0.) {
	m_idc.push_back(string("MP")+ToString(hi)+string("_")+Order(lm[hit]));
      }
      else m_idc.push_back(string("MlP_")+Order(lm[hit]));
      break;
    case 0: case 10:
      sf<<"  Vec4D  "<<momp[hit]<<";"<<endl
	<<"  double s"<<Order(lm[hit])<<";"<<endl;
      if (maxpole>0.) {
	sf<<"  s"<<Order(lm[hit])
	  <<" = CE.MassivePropMomenta(fl"<<lm[hit]<<".Mass(),"<<"fl"<<lm[hit]<<".Width(),1,"
	  <<"s"<<Order(lm[hit])<<"_min,s"<<Order(lm[hit])<<"_max,ran["<<rannum<<"]);"<<endl;
      }
      else {
	sf<<"  s"<<Order(lm[hit])<<" = CE.MasslessPropMomenta(1.,s"<<Order(lm[hit])<<"_min,"
	  <<"s"<<Order(lm[hit])<<"_max,ran["<<rannum<<"]);"<<endl;
      }
      rannum++;
      break;
    default:
      string s(""); 
      for (int i=0;i<(int)lm[hit].length()-1;i++) s += string("p[")+GetMassIndex(lm[hit][i])+string("]+");
      s += string("p[")+GetMassIndex(lm[hit][lm[hit].length()-1])+string("]");
     
      AddToVariables(flag,lm[hit],s,1,sf);
//.........这里部分代码省略.........