PVfunctions.h

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/* 
 * Copyright (C) 2012 HEPfit Collaboration
 * All rights reserved.
 *
 * For the licensing terms see doc/COPYING.
 */

#ifndef PVFUNCTIONS_H
#define PVFUNCTIONS_H

// set in case where LoopTools library is employed.
//#define USE_LOOPTOOLS

#include "gslpp.h"
#include "Polylogarithms.h"
#ifdef USE_LOOPTOOLS
#include "LoopToolsWrapper.h"
#endif

class PVfunctions {
public:

    PVfunctions(const bool bExtraMinusSign);

    double A0(const double mu2, const double m2) const;
    
    gslpp::complex B0(const double mu2, const double p2,
               const double m02, const double m12) const;
    
    gslpp::complex B1(const double mu2, const double p2,
               const double m02, const double m12) const;
    
    gslpp::complex B11(const double mu2, const double p2,
                const double m02, const double m12) const;
    
    gslpp::complex B00(const double mu2, const double p2,
                const double m02, const double m12) const;
    
    gslpp::complex Bf(const double mu2, const double p2,
               const double m02, const double m12) const;
    
    gslpp::complex B0p(const double muIR2, const double p2,
                const double m02, const double m12) const;
    
    gslpp::complex B1p(const double mu2, const double p2,
                const double m02, const double m12) const;
    
    gslpp::complex B11p(const double mu2, const double p2,
                 const double m02, const double m12) const;

    gslpp::complex B00p(const double mu2, const double p2,
                 const double m02, const double m12) const;
    
    gslpp::complex Bfp(const double mu2, const double p2,
                const double m02, const double m12) const;

    gslpp::complex C0(const double p2, 
               const double m02, const double m12, const double m22) const;

    double C11(const double m12, const double m22, const double m32) const;

    double C12(const double m12, const double m22, const double m32) const;

    gslpp::complex D0(const double s, const double t, const double m02, const double m12,
               const double m22, const double m32) const;

    gslpp::complex D00(const double s, const double t, const double m02, const double m12,
                const double m22, const double m32) const;

private:
    double ExtraMinusSign;
    Polylogarithms myPolylog;
#ifdef USE_LOOPTOOLS
    LoopToolsWrapper myLT;
#endif
};

#endif  /* PVFUNCTIONS_H */