RooFlatte Class Reference

#include <RooFlatte.hh>

List of all members.

Public Member Functions
	RooFlatte (const char *name, const char *title, RooAbsReal &_x, RooAbsReal &_mean, RooAbsReal &_g0, RooAbsReal &_m0a, RooAbsReal &_m0b, RooAbsReal &_g1, RooAbsReal &_m1a, RooAbsReal &_m1b)
	RooFlatte (const RooFlatte &other, const char *name=0)
virtual TObject *	clone (const char *newname) const
virtual	~RooFlatte ()
Protected Member Functions
Double_t	evaluate () const
Protected Attributes
RooRealProxy	x
RooRealProxy	mean
RooRealProxy	g0
RooRealProxy	m0a
RooRealProxy	m0b
RooRealProxy	g1
RooRealProxy	m1a
RooRealProxy	m1b

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Detailed Description

Definition at line 9 of file RooFlatte.hh.

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Constructor & Destructor Documentation

RooFlatte::RooFlatte	(	const char *	name,
		const char *	title,
		RooAbsReal &	_x,
		RooAbsReal &	_mean,
		RooAbsReal &	_g0,
		RooAbsReal &	_m0a,
		RooAbsReal &	_m0b,
		RooAbsReal &	_g1,
		RooAbsReal &	_m1a,
		RooAbsReal &	_m1b
	)

Referenced by clone().

RooFlatte::RooFlatte	(	const RooFlatte &	other,
		const char *	name = 0
	)

Definition at line 60 of file RooFlatte.cc.

                                       : 
  RooAbsPdf(other,name), 
  x("x",this,other.x), 
  mean("mean",this,other.mean),
  g0("g0",this,other.g0),
  m0a("m0a",this,other.m0a),
  m0b("m0b",this,other.m0b),
  g1("g1",this,other.g1),
  m1a("m1a",this,other.m1a),
  m1b("m1b",this,other.m1b)
{
}

virtual RooFlatte::~RooFlatte

(

)

[inline, virtual]

Definition at line 22 of file RooFlatte.hh.

{ }

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Member Function Documentation

virtual TObject* RooFlatte::clone

(

const char *

newname

)

const [inline, virtual]

Definition at line 19 of file RooFlatte.hh.

References RooFlatte().

                                                    { 
    return new RooFlatte(*this,newname); 
  }

Double_t RooFlatte::evaluate

(

)

const [protected]

Definition at line 75 of file RooFlatte.cc.

References g0, g1, m0a, m0b, m1a, m1b, mean, and x.

{
  // calculate Flatte amplitude

  if (g0<0 || g1<0) {return(0);}

  Double_t s = x*x;

  // Energy, centre of mass p^2 of first channel
  Double_t E0a = 0.5 * (s + m0a*m0a - m0b*m0b) / x;
  Double_t qSq0 = E0a*E0a - m0a*m0a; 

  // Energy, centre of mass p^2 of second channel
  Double_t E1a = 0.5 * (s + m1a*m1a - m1b*m1b) / x;
  Double_t qSq1 = E1a*E1a - m1a*m1a; 

  RooComplex gamma0 = (qSq0 > 0) ? RooComplex(g0*sqrt(qSq0),0) : 
    RooComplex(0, g0*sqrt(-qSq0));

  RooComplex gamma1 = (qSq1 > 0) ? RooComplex(g1*sqrt(qSq1),0) : 
    RooComplex(0, g1*sqrt(-qSq1));

  RooComplex gamma = gamma0 + gamma1;

  RooComplex partB = RooComplex(0.0, 2*mean/x) * gamma;
  RooComplex partA(mean*mean - s, 0);

  RooComplex denom = partA - partB;

  //RooComplex T(mean*sqrt(g0*g1),0);
  RooComplex T(1,0);
  T = T / denom;

  return(T.abs2()); // Amplitude (arbitrary scale)

}

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Member Data Documentation

RooRealProxy RooFlatte::g0 [protected]

Definition at line 28 of file RooFlatte.hh.

Referenced by evaluate().

RooRealProxy RooFlatte::g1 [protected]

Definition at line 31 of file RooFlatte.hh.

Referenced by evaluate().

RooRealProxy RooFlatte::m0a [protected]

Definition at line 29 of file RooFlatte.hh.

Referenced by evaluate().

RooRealProxy RooFlatte::m0b [protected]

Definition at line 30 of file RooFlatte.hh.

Referenced by evaluate().

RooRealProxy RooFlatte::m1a [protected]

Definition at line 32 of file RooFlatte.hh.

Referenced by evaluate().

RooRealProxy RooFlatte::m1b [protected]

Definition at line 33 of file RooFlatte.hh.

Referenced by evaluate().

RooRealProxy RooFlatte::mean [protected]

Definition at line 27 of file RooFlatte.hh.

Referenced by evaluate().

RooRealProxy RooFlatte::x [protected]

Definition at line 26 of file RooFlatte.hh.

Referenced by evaluate().

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

• RooFlatte.hh
• RooFlatte.cc

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