PPPModel.h

/********************************************************************************

    Copyright 2013 Jan Kašpar

    This file is part of Elegent (http://elegent.hepforge.org/).

    Elegent is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Elegent is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Elegent.  If not, see <http://www.gnu.org/licenses/>.
 
********************************************************************************/

#ifndef _elegent_ppp_model_
#define _elegent_ppp_model_

#include "Model.h"
#include "Math.h"

namespace Elegent
{

class PPPModel : public Model
{
    public:
        struct Trajectory
        {
            double D, c, ap, r2, rho2;
            TComplex gamma;
        };

        enum VariantType
        {
            v2P,    
            v3P     
        } variant;
        
        PPPModel();
        ~PPPModel();
        
        void Configure(VariantType v);

        virtual void Init();

        virtual void Print() const;

        virtual TComplex Amp(double t) const;

        virtual TComplex Prf(double b) const;

    protected:
        Trajectory pom1, pom2, pom3, oder, regf, rego;
        double s0;
        double precision, upper_bound;

        bool integ_workspace_initialized;
        unsigned long integ_workspace_size;
        gsl_integration_workspace *integ_workspace;

        static void SetTrajectory(Trajectory &t, double D, double c, double ap, double r2, double s0);

        static TComplex Delta(const Trajectory &, double t);

        virtual TComplex prf0(double b) const;

        static TComplex prf_J0(double b, double *par, const void *obj);
};

} // namespace

#endif