EvtFlatte Class Reference

#include <EvtFlatte.hh>

List of all members.

Public Member Functions
EvtFlatte &	operator= (const EvtFlatte &)
	EvtFlatte (const EvtVector4R &p4_p, const EvtVector4R &p4_d1, const EvtVector4R &p4_d2, double ampl, double theta, double mass, vector< EvtFlatteParam > &params)
virtual	~EvtFlatte ()
const EvtVector4R &	p4_p ()
const EvtVector4R &	p4_d1 ()
const EvtVector4R &	p4_d2 ()
double	amplitude ()
double	theta ()
double	mass ()
EvtComplex	resAmpl ()
Private Member Functions
EvtComplex	sqrtCplx (double in)
Private Attributes
EvtVector4R	_p4_p
EvtVector4R	_p4_d1
EvtVector4R	_p4_d2
double	_ampl
double	_theta
double	_mass
vector< EvtFlatteParam >	_params

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Detailed Description

Definition at line 48 of file EvtFlatte.hh.

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Constructor & Destructor Documentation

EvtFlatte::EvtFlatte	(	const EvtVector4R &	p4_p,
		const EvtVector4R &	p4_d1,
		const EvtVector4R &	p4_d2,
		double	ampl,
		double	theta,
		double	mass,
		vector< EvtFlatteParam > &	params
	)

Definition at line 55 of file EvtFlatte.cc.

                      : 
  _p4_p(p4_p),_p4_d1(p4_d1), _p4_d2(p4_d2), _ampl(ampl), _theta(theta), 
  _mass(mass),
  _params(params)
  //  _m1a(m1a), _m1b(m1b), _g1(g1),
  //  _m2a(m2a), _m2b(m2b), _g2(g2)
{}

EvtFlatte::~EvtFlatte

(

)

[virtual]

Definition at line 30 of file EvtFlatte.cc.

{}

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Member Function Documentation

double EvtFlatte::amplitude

(

)

[inline]

Definition at line 75 of file EvtFlatte.hh.

References _ampl.

{ return _ampl; }  

double EvtFlatte::mass

(

)

[inline]

Definition at line 81 of file EvtFlatte.hh.

References _mass.

Referenced by resAmpl().

{ return _mass; } 

EvtFlatte & EvtFlatte::operator=

(

const EvtFlatte &

)

Definition at line 34 of file EvtFlatte.cc.

References _ampl, _mass, _p4_d1, _p4_d2, _p4_p, _params, and _theta.

{
  if ( &n == this ) return *this;
  _p4_p = n._p4_p;
  _p4_d1 = n._p4_d1;
  _p4_d2 = n._p4_d2;
  _ampl = n._ampl;
  _theta = n._theta;
  _mass = n._mass;
  _params = n._params;
  //  _m1a = n._m1a;
  //  _m1b = n._m1b;
  //  _g1 = n._g1;
  //  _m2a = n._m2a;
  //  _m2b = n._m2b;
  //  _g2 = n._g2;
  return  *this;
}

const EvtVector4R& EvtFlatte::p4_d1

(

)

[inline]

Definition at line 70 of file EvtFlatte.hh.

References _p4_d1.

{ return _p4_d1; }

const EvtVector4R& EvtFlatte::p4_d2

(

)

[inline]

Definition at line 71 of file EvtFlatte.hh.

References _p4_d2.

{ return _p4_d2; }  

const EvtVector4R& EvtFlatte::p4_p

(

)

[inline]

Definition at line 69 of file EvtFlatte.hh.

References _p4_p.

{ return _p4_p; }

EvtComplex EvtFlatte::resAmpl

(

)

Definition at line 71 of file EvtFlatte.cc.

References _ampl, _mass, _p4_d1, _p4_d2, _params, _theta, cos(), mass(), EvtConst::radToDegrees, sin(), sqrtCplx(), and w.

Referenced by EvtDDalitz::decay().

                              {
 
  double pi180inv = 1.0/EvtConst::radToDegrees;

  //   EvtComplex ampl(cos(_theta*pi180inv), sin(_theta*pi180inv));
  //   ampl *= _ampl;

  // SCALARS ONLY
  double mR = (_p4_d1+_p4_d2).mass();

  EvtComplex w;

  for (vector<EvtFlatteParam>::const_iterator param = _params.begin();
       param != _params.end();
       ++param) {

    double m1 = (*param).m1(); double m2 = (*param).m2(); 
    double g = (*param).g();
    w += (g*g
          *sqrtCplx((1-((m1-m2)*(m1-m2))/(mR*mR))*
                    (1-((m1+m2)*(m1+m2))/(mR*mR))));
    //     cout << m1 << " " << mR << " " << w << endl;
  }

  EvtComplex denom = _mass*_mass - mR*mR - EvtComplex(0,1)*w;
  EvtComplex ampl = _ampl*EvtComplex(cos(_theta*pi180inv), sin(_theta*pi180inv))/denom;
  //  cout << abs(1/denom) << endl;
  return ampl;
}

EvtComplex EvtFlatte::sqrtCplx

(

double

in

)

[inline, private]

Definition at line 90 of file EvtFlatte.hh.

Referenced by resAmpl().

                                        { return (in > 0) ? EvtComplex(sqrt(in), 0) : EvtComplex
                                            (0, sqrt(-in)); }

double EvtFlatte::theta

(

)

[inline]

Definition at line 78 of file EvtFlatte.hh.

References _theta.

{ return _theta; } 

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Member Data Documentation

double EvtFlatte::_ampl [private]

Definition at line 94 of file EvtFlatte.hh.

Referenced by amplitude(), operator=(), and resAmpl().

double EvtFlatte::_mass [private]

Definition at line 94 of file EvtFlatte.hh.

Referenced by mass(), operator=(), and resAmpl().

EvtVector4R EvtFlatte::_p4_d1 [private]

Definition at line 93 of file EvtFlatte.hh.

Referenced by operator=(), p4_d1(), and resAmpl().

EvtVector4R EvtFlatte::_p4_d2 [private]

Definition at line 93 of file EvtFlatte.hh.

Referenced by operator=(), p4_d2(), and resAmpl().

EvtVector4R EvtFlatte::_p4_p [private]

Definition at line 93 of file EvtFlatte.hh.

Referenced by operator=(), and p4_p().

vector<EvtFlatteParam> EvtFlatte::_params [private]

Definition at line 95 of file EvtFlatte.hh.

Referenced by operator=(), and resAmpl().

double EvtFlatte::_theta [private]

Definition at line 94 of file EvtFlatte.hh.

Referenced by operator=(), resAmpl(), and theta().

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