alphaqcdqed.h

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//
// APFEL++ 2017
//
// Author: Valerio Bertone: valerio.bertone@cern.ch
//
 
#pragma once
 
#include "apfel/matchedevolution.h"
#include "apfel/matrix.h"
#include "apfel/tools.h"
 
#include <functional>
 
namespace apfel
{
  class AlphaQCDQED: public MatchedEvolution<matrix<double>>
  {
  public:
    AlphaQCDQED() = delete;
 
    AlphaQCDQED(double              const& AlphaQCDRef,
                double              const& AlphaQEDRef,
                double              const& MuRef,
                std::vector<double> const& QuarkThresholds,
                std::vector<double> const& LeptThresholds,
                int                 const& pt,
                int                 const& nsteps = 10);
 
    matrix<double> MatchObject(bool const& Up, int const& nfl, matrix<double> const& Coup) const;
 
    matrix<double> Derivative(int const& nfl, double const&, matrix<double> const& as) const;
 
    matrix<double> betaQCDQED(int const& pt, int const& nf, int const& nl) const;
 
  private:
    int                                                              const _pt;                    
    std::function<matrix<double>(int const&, matrix<double> const&)>       _BetaFunction;          
  };
}