LauCrystalBallPdf.hh

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/*
Copyright 2006 University of Warwick

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

/*
Laura++ package authors:
John Back
Paul Harrison
Thomas Latham
*/

/*****************************************************************************
 * Class based on RooFit/RooCBShape.                                         *
 * Original copyright given below.                                           *
 *****************************************************************************
 * Authors:                                                                  *
 *   WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu       *
 *   DK, David Kirkby,    UC Irvine,         dkirkby@uci.edu                 *
 *                                                                           *
 * Copyright (c) 2000-2005, Regents of the University of California          *
 *                          and Stanford University. All rights reserved.    *
 *                                                                           *
 * Redistribution and use in source and binary forms,                        *
 * with or without modification, are permitted according to the terms        *
 * listed in LICENSE (http://roofit.sourceforge.net/license.txt)             *
 *****************************************************************************/

#ifndef LAU_CRYSTAL_BALL_PDF
#define LAU_CRYSTAL_BALL_PDF

#include <vector>

#include "TString.h"

#include "LauAbsPdf.hh"

class LauParameter;


class LauCrystalBallPdf : public LauAbsPdf {

        public:

                LauCrystalBallPdf(const TString& theVarName, const std::vector<LauAbsRValue*>& params, Double_t minAbscissa, Double_t maxAbscissa);

                virtual ~LauCrystalBallPdf();


                virtual void calcLikelihoodInfo(const LauAbscissas& abscissas);
                
                using LauAbsPdf::calcLikelihoodInfo;

                virtual void calcNorm();
                

                virtual void calcPDFHeight( const LauKinematics* kinematics );

        protected:


                Double_t approxErf(Double_t arg) const;

        private:
                LauCrystalBallPdf(const LauCrystalBallPdf& other);

                LauCrystalBallPdf& operator=(const LauCrystalBallPdf& other);

                LauAbsRValue* mean_;
                LauAbsRValue* sigma_;
                LauAbsRValue* alpha_;
                LauAbsRValue* n_;

                ClassDef(LauCrystalBallPdf,0) // Define the Crystal Ball PDF
};

#endif