RooCrystalBall.h

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// Author: Jonas Rembser, CERN  02/2021
 
#ifndef RooFit_RooFit_RooCrystalBall_h
#define RooFit_RooFit_RooCrystalBall_h
 
#include "RooAbsPdf.h"
#include "RooRealProxy.h"
 
#include <memory>
 
class RooRealVar;
 
class RooCrystalBall final : public RooAbsPdf {
public:
 
   RooCrystalBall(){};
 
   RooCrystalBall(const char *name, const char *title, RooAbsReal &x, RooAbsReal &x0, RooAbsReal &sigmaL,
                  RooAbsReal &sigmaR, RooAbsReal &alphaL, RooAbsReal &nL, RooAbsReal &alphaR, RooAbsReal &nR);
   RooCrystalBall(const char *name, const char *title, RooAbsReal &x, RooAbsReal &x0, RooAbsReal &sigmaLR,
                  RooAbsReal &alphaL, RooAbsReal &nL, RooAbsReal &alphaR, RooAbsReal &nR);
   RooCrystalBall(const char *name, const char *title, RooAbsReal &x, RooAbsReal &x0, RooAbsReal &sigmaLR,
                  RooAbsReal &alpha, RooAbsReal &n, bool doubleSided = false);
 
   RooCrystalBall(const RooCrystalBall &other, const char *name = nullptr);
   TObject *clone(const char *newname) const override { return new RooCrystalBall(*this, newname); }
 
   Int_t getAnalyticalIntegral(RooArgSet &allVars, RooArgSet &analVars, const char *rangeName = nullptr) const override;
   double analyticalIntegral(Int_t code, const char *rangeName = nullptr) const override;
 
   // Optimized accept/reject generator support
   Int_t getMaxVal(const RooArgSet &vars) const override;
   double maxVal(Int_t code) const override;
 
protected:
   double evaluate() const override;
 
private:
   RooRealProxy x_;
   RooRealProxy x0_;
   RooRealProxy sigmaL_;
   RooRealProxy sigmaR_;
   RooRealProxy alphaL_;
   RooRealProxy nL_;
 
   // optional parameters
   std::unique_ptr<RooRealProxy> alphaR_ = nullptr;
   std::unique_ptr<RooRealProxy> nR_ = nullptr;
 
   ClassDefOverride(RooCrystalBall, 1)
};
 
#endif