DLModel.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_dl_model_
#define _elegent_dl_model_

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

namespace Elegent
{

class DLModel : public Model
{
    public:
        DLModel();
        ~DLModel();
        
        void Configure();

        virtual void Init();

        virtual void Print() const;

        virtual TComplex Amp(double t) const;

        virtual TComplex Prf(double b_fm) const;

    protected:
        double ep_P, ep_pl, ep_mi;
        double X_P, X_pl, X_mi;
        double al_P_p, al_pl_p, al_mi_p;
        double A, a, b;
        double C, t0;

        double upper_bound_t, precision_t;

        bool integ_workspace_initialized;
        unsigned long integ_workspace_size_t;
        gsl_integration_workspace *integ_workspace_t;

        double Nu(double t) const;

        double F(double t) const;

        TComplex A_single(double t) const;

        TComplex A_PP(double t) const;

        TComplex A_ggg(double t) const;

        static TComplex Amp_J0(double t, double *par, const void *vobj);
};

} // namespace

#endif