51 x(
"x",
"Dependent",this,_x),
52 mean(
"mean",
"Mean",this,_mean),
53 width(
"width",
"Breit-Wigner Width",this,_width),
54 sigma(
"sigma",
"Gauss Width",this,_sigma),
63 RooAbsPdf(other,
name),
x(
"x",this,other.
x), mean(
"mean",this,other.mean),
65 _doFast(other._doFast)
81 if (
s==0. && w==0.)
return 1.;
84 if (
s==0.)
return (1./(arg*arg+0.25*w*w));
87 if (w==0.)
return exp(coef*arg*arg);
93 std::complex<Double_t> z(u,
a) ;
94 std::complex<Double_t>
v(0.) ;
include TDocParser_001 C image html pict1_TDocParser_001 png width
double atan2(double, double)
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
static std::complex< double > faddeeva(std::complex< double > z)
evaluate Faddeeva function for complex argument
static std::complex< double > faddeeva_fast(std::complex< double > z)
evaluate Faddeeva function for complex argument (fast version)
RooVoigtian is an efficient implementation of the convolution of a Breit-Wigner with a Gaussian,...
Double_t evaluate() const
Evaluate this PDF / function / constant. Needs to be overridden by all derived classes.
static constexpr double s