49 dm(
"dm",
"Dstar-D0 Mass Diff",this, _dm),
50 dm0(
"dm0",
"Threshold",this, _dm0),
51 C(
"C",
"Shape Parameter",this, _c),
52 A(
"A",
"Shape Parameter 2",this, _a),
53 B(
"B",
"Shape Parameter 3",this, _b)
60 RooAbsPdf(other,
name), dm(
"dm",this,other.dm), dm0(
"dm0",this,other.dm0),
61 C(
"C",this,other.
C),
A(
"A",this,other.
A),
B(
"B",this,other.
B)
70 if (arg <= 0 )
return 0;
74 return (val > 0 ? val : 0) ;
95 if (max <=
dm0 )
return 0;
96 else if (min <
dm0) min =
dm0;
99 if (
A != 0 ) doNumerical=
kTRUE;
108 if ( ! doNumerical ) {
110 B * (0.5* (max*max - min*min)/
dm0 - (max- min));
Abstract interface for evaluating a real-valued function of one real variable and performing numerica...
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
RooAbsFunc * bindVars(const RooArgSet &vars, const RooArgSet *nset=0, Bool_t clipInvalid=kFALSE) const
Create an interface adaptor f(vars) that binds us to the specified variables (in arbitrary order).
RooArgSet is a container object that can hold multiple RooAbsArg objects.
Special p.d.f shape that can be used to model the background of D*-D0 mass difference distributions.
Double_t analyticalIntegral(Int_t code, const char *rangeName=0) const
Implements the actual analytical integral(s) advertised by getAnalyticalIntegral.
Int_t getAnalyticalIntegral(RooArgSet &allVars, RooArgSet &analVars, const char *rangeName=0) const
if (matchArgs(allVars,analVars,dm)) return 1 ;
Double_t evaluate() const
Evaluate this PDF / function / constant. Needs to be overridden by all derived classes.
RooIntegrator1D implements an adaptive one-dimensional numerical integration algorithm.
virtual Double_t integral(const Double_t *yvec=0)
Calculate numeric integral at given set of function binding parameters.
Double_t min(const char *rname=0) const
const RooAbsReal & arg() const
Double_t max(const char *rname=0) const
LongDouble_t Power(LongDouble_t x, LongDouble_t y)