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ModeFinderFunctor.cpp
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ModeFinderFunctor.cpp
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//==============================================================================
// ModeFinderFunctor.cpp
//
// Copyright (C) 2010-2013 Tobias Toll and Thomas Ullrich
//
// This file is part of Sartre version: 1.1
//
// 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: Thomas Ullrich
// Last update:
// $Date: 2013-05-29 21:26:19 +0100 (Wed, 29 May 2013) $
// $Author: thomas.ullrich@bnl.gov $
//==============================================================================
#include "ModeFinderFunctor.h"
#include "CrossSection.h"
#include "Kinematics.h"
using namespace std;
ModeFinderFunctor::ModeFinderFunctor()
{
mCrossSection = 0;
mQ2 = mVmMass = mMinT = mMaxT = 0;
}
ModeFinderFunctor::ModeFinderFunctor(CrossSection* cs, double Q2, double vmMass, double tmin, double tmax)
{
mCrossSection = cs;
mQ2 = Q2;
mVmMass = vmMass;
mMinT = tmin;
mMaxT = tmax;
}
void ModeFinderFunctor::setVmMass(double val) {mVmMass = val;}
void ModeFinderFunctor::setQ2(double val) {mQ2 = val;}
void ModeFinderFunctor::setMinT(double val) {mMinT = val;}
void ModeFinderFunctor::setMaxT(double val) {mMaxT = val;}
double ModeFinderFunctor::DoEval(double W2) const
{
if (mCrossSection) {
double t = Kinematics::tmax(0, mQ2, W2, mVmMass); // first arg (t) set to 0 here
if (t > mMaxT) t = mMaxT; // don't exceed given (table) maximum (smallest |t|)
if (t < mMinT) return 0; // lower table limits (treat different than max limit)
double result = (*mCrossSection)(t, mQ2, W2); // t, Q2, W2
return -result; // minimum=maximum
}
else {
return 0;
}
}
ROOT::Math::IGenFunction* ModeFinderFunctor::Clone() const
{
return new ModeFinderFunctor(mCrossSection, mQ2, mVmMass, mMinT, mMaxT);
}

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