TFormFactor Class Reference

#include <TFormFactor.h>

Inheritance diagram for TFormFactor:

List of all members.

Public Member Functions
	TFormFactor ()
virtual	~TFormFactor ()
void	SetUnitFF ()
void	SetDefaultFF ()
bool	GetFFMode ()
void	SetNpoints (const unsigned int &i)
void	Init ()
void	Init (const double &)
std::complex< double >	Eval (const double &s)
void	Print ()
Protected Member Functions
virtual std::complex< double >	ff (const double &)=0
Protected Attributes
unsigned int	fNp
TRadSpline *	fsvsr
TRadSpline *	fsvsi
bool	fUnitFF

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Detailed Description

Definition at line 7 of file TFormFactor.h.

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Constructor & Destructor Documentation

TFormFactor::TFormFactor

(

)

Definition at line 8 of file TFormFactor.C.

References fNp, fsvsi, fsvsr, and fUnitFF.

                        {
  fsvsr = NULL;
  fsvsi = NULL;
  fNp   = 4000;
  fUnitFF = false;
}

TFormFactor::~TFormFactor

(

)

[virtual]

Definition at line 15 of file TFormFactor.C.

References fsvsi, and fsvsr.

                         {
  if(fsvsr) delete fsvsr;
  if(fsvsr) delete fsvsi;
  //  std::cout<<"Deleting FormFactor"<<std::endl;
}

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Member Function Documentation

std::complex<double> TFormFactor::Eval

(

const double &

s

)

[inline]

Definition at line 23 of file TFormFactor.h.

References TRadSpline::Eval(), fsvsi, fsvsr, and fUnitFF.

Referenced by TPiCrossPart::BornShift(), isr(), main(), Print(), TPiCrossPart::R_Gamma(), TPiCrossPart::R_Gamma_kuraev_eidelman(), and TPiCrossPart::R_Gamma_t().

                                                  {
    if(fUnitFF) return std::complex<double>(1,0);
    return std::complex<double>(fsvsr->Eval(s),fsvsi->Eval(s));
  }

virtual std::complex<double> TFormFactor::ff

(

const double &

)

[protected, pure virtual]

Implemented in TKcFormFactor, TKnFormFactor, and TPiFormFactor.

Referenced by Init().

bool TFormFactor::GetFFMode

(

)

[inline]

Definition at line 19 of file TFormFactor.h.

References fUnitFF.

{return fUnitFF;}

void TFormFactor::Init

(

const double &

)

Definition at line 30 of file TFormFactor.C.

References ff(), fNp, fsvsi, fsvsr, TRadGlobal::Get_MF2(), TRadGlobal::Get_s(), gGlobal, genRecEmupikp::i, imag(), and s.

                                        {
  double *s     = new double[fNp];
  double *re_vs = new double[fNp];
  double *im_vs = new double[fNp];
  /*  
  for(int i = 1;i<=1;i++){
    double en = 500 + i;
    std::complex<double> form = ff(pow(2*en,2));
    std::cout<< en << " " << form<<" "<<std::abs(form*std::conj(form))<<std::endl;
  }
  exit(0);
  */
  double smin = gGlobal->Get_MF2()*gGlobal->Get_s();
  double ds = (smax-smin)/(fNp-1);
  for(unsigned int i=0; i<fNp; i++){
    s[i] = smin + i*ds;
    std::complex<double> vs = ff( (i>0) ? s[i] : smin + 0.01*ds);
    //    std::cout<<i<<" "<<s[i]<<" "<<vs<<std::endl;
    re_vs[i] = std::real(vs);
    im_vs[i] = std::imag(vs);
  }

  if(fsvsr) delete fsvsr;
  fsvsr = new TRadSpline3("vsr", s, re_vs, fNp);

  if(fsvsi) delete fsvsi;
  fsvsi = new TRadSpline3("vsi", s, im_vs, fNp);

  delete [] re_vs;
  delete [] im_vs;
  delete [] s;
}

void TFormFactor::Init

(

)

Definition at line 21 of file TFormFactor.C.

References TRadGlobal::Get_s(), and gGlobal.

Referenced by TPiCrossPart::Init(), and main().

                      {
#ifndef ALONE
  double smax = gGlobal->Get_s();
#else
  double smax = 4*800*800;
#endif
  Init(smax);
}

void TFormFactor::Print

(

)

Definition at line 63 of file TFormFactor.C.

References abs, conj(), Eval(), TRadGlobal::Get_s(), and gGlobal.

                       {
#ifndef ALONE
  std::complex<double> form = Eval(gGlobal->Get_s());
#else
  std::complex<double> form = Eval(4*200*200);
#endif
  std::cout<<"Formfactor is "<<form<<std::endl;
  std::cout<<"Squared formfactor is "<<std::abs(form*std::conj(form))<<std::endl;
  std::cout<<std::flush;
}

void TFormFactor::SetDefaultFF

(

)

[inline]

Definition at line 18 of file TFormFactor.h.

References fUnitFF.

Referenced by TPiCrossPart::Init().

{fUnitFF = false;}

void TFormFactor::SetNpoints

(

const unsigned int &

i

)

[inline]

Definition at line 20 of file TFormFactor.h.

References fNp.

{fNp = i;}

void TFormFactor::SetUnitFF

(

)

[inline]

Definition at line 17 of file TFormFactor.h.

References fUnitFF.

Referenced by TPiCrossPart::Init(), and main().

{fUnitFF = true;}

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Member Data Documentation

unsigned int TFormFactor::fNp [protected]

Definition at line 9 of file TFormFactor.h.

Referenced by Init(), SetNpoints(), and TFormFactor().

TRadSpline* TFormFactor::fsvsi [protected]

Definition at line 11 of file TFormFactor.h.

Referenced by Eval(), Init(), TFormFactor(), and ~TFormFactor().

TRadSpline* TFormFactor::fsvsr [protected]

Definition at line 10 of file TFormFactor.h.

Referenced by Eval(), Init(), TFormFactor(), and ~TFormFactor().

bool TFormFactor::fUnitFF [protected]

Definition at line 12 of file TFormFactor.h.

Referenced by Eval(), GetFFMode(), SetDefaultFF(), SetUnitFF(), and TFormFactor().

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