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//==============================================================================
// Amplitudes.h
//
// Copyright (C) 2010-2013 Tobias Toll and Thomas Ullrich
//
// This file is part of Sartre version: 1.00
//
// This program 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.
// This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
//
// Author: Tobias Toll
// Last update:
// $Date: 2013-01-14 21:47:05 +0000 (Mon, 14 Jan 2013) $
// $Author: thomas.ullrich@bnl.gov $
//==============================================================================
//
// The Amplitudes class calculate \gamma-A dsigma/dt cross-sections
// for a given t, Q2, W2 for T and L photons.
// It also calculates the respective coherent parts of the cross-sections
//
// The results are accessed by the public functions:
// double amplitudeT() for <A_T>
// double amplitudeL() for <A_L>
// double amplitudeT2() for <|A_T|^2>
// double amplitudeL2() for <|A_L|^2>
//
// Units are <|A|^2> in nb/GeV^2 and <A> in sqrt(nb/GeV^2)
//
//===============================================================================
#ifndef Amplitudes_h
#define Amplitudes_h
#include <vector>
using namespace std;
class IntegralsExclusive;
class Amplitudes {
public:
Amplitudes();
Amplitudes(const Amplitudes&);
~Amplitudes();
Amplitudes& operator=(const Amplitudes&);
void calculate(double, double, double);
void generateConfigurations();
double amplitudeT() const;
double amplitudeL() const;
double amplitudeT2() const;
double amplitudeL2() const;
double errorT() const;
double errorL() const;
double errorT2() const;
double errorL2() const;
private:
// vector of instances of the integrals class:
vector<IntegralsExclusive*> mIntegrals;
// these are the results:
double mAmplitudeT;
double mAmplitudeL;
double mAmplitudeT2;
double mAmplitudeL2;
//...and the (absolute) errors:
double mErrorT;
double mErrorL;
double mErrorT2;
double mErrorL2;
int mNumberOfConfigurations;
int mTheModes;
unsigned int mA;
};
inline double Amplitudes::amplitudeT() const {return mAmplitudeT;}
inline double Amplitudes::amplitudeL() const {return mAmplitudeL;}
inline double Amplitudes::amplitudeT2() const {return mAmplitudeT2;}
inline double Amplitudes::amplitudeL2() const {return mAmplitudeL2;}
inline double Amplitudes::errorT() const {return mErrorT;}
inline double Amplitudes::errorL() const {return mErrorL;}
inline double Amplitudes::errorT2() const {return mErrorT2;}
inline double Amplitudes::errorL2() const {return mErrorL2;}
#endif

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