LauMagPhaseCPCoeffSet.cc

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// Copyright University of Warwick 2011 - 2013.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

// Authors:
// Thomas Latham
// John Back
// Paul Harrison

#include <iostream>
#include <fstream>
#include <vector>
using std::cout;
using std::cerr;
using std::endl;

#include "TMath.h"
#include "TRandom.h"

#include "LauMagPhaseCPCoeffSet.hh"
#include "LauComplex.hh"
#include "LauConstants.hh"
#include "LauParameter.hh"
#include "LauPrint.hh"
#include "LauRandom.hh"

ClassImp(LauMagPhaseCPCoeffSet)


LauMagPhaseCPCoeffSet::LauMagPhaseCPCoeffSet(const TString& compName, Double_t mag, Double_t phase, Double_t magBar, Double_t phaseBar,
                Bool_t magFixed, Bool_t phaseFixed,Bool_t magBarFixed, Bool_t phaseBarFixed) :
        LauAbsCoeffSet(compName),
        minMag_(-40.0),
        maxMag_(+40.0),
        minPhase_(-LauConstants::threePi),
        maxPhase_(+LauConstants::threePi),
        mag_(new LauParameter("Mag", mag, minMag_, maxMag_, magFixed)),
        phase_(new LauParameter("Phase", phase, minPhase_, maxPhase_, phaseFixed)),
        magBar_(new LauParameter("MagBar", magBar, minMag_, maxMag_, magBarFixed)),
        phaseBar_(new LauParameter("PhaseBar", phaseBar, minPhase_, maxPhase_, phaseBarFixed)),
        acp_("ACP", (magBar*magBar - mag*mag)/(magBar*magBar + mag*mag), -1.0, 1.0)
{
        // Print message
        cout<<"Set component \""<<this->name()<<"\" to have mag = "<<mag_->value()<<",\tphase = "<<phase_->value()<<",\t";
        cout<<"magBar = "<<magBar_->value()<<",\tphaseBar = "<<phaseBar_->value()<<"."<<endl;

}

LauMagPhaseCPCoeffSet::LauMagPhaseCPCoeffSet(const LauMagPhaseCPCoeffSet& rhs, Double_t constFactor) : LauAbsCoeffSet(rhs.name())
{
        minMag_ = rhs.minMag_;
        maxMag_ = rhs.maxMag_;
        minPhase_ = rhs.minPhase_;
        maxPhase_ = rhs.maxPhase_;
        mag_ = rhs.mag_->createClone(constFactor);
        phase_ = rhs.phase_->createClone(constFactor);
        magBar_ = rhs.magBar_->createClone(constFactor);
        phaseBar_ = rhs.phaseBar_->createClone(constFactor);
        acp_ = rhs.acp_;
}

LauMagPhaseCPCoeffSet& LauMagPhaseCPCoeffSet::operator=(const LauMagPhaseCPCoeffSet& rhs)
{
        if (&rhs == this) {
                return *this;
        }
        this->name(rhs.name());
        minMag_ = rhs.minMag_;
        maxMag_ = rhs.maxMag_;
        minPhase_ = rhs.minPhase_;
        maxPhase_ = rhs.maxPhase_;
        mag_ = rhs.mag_->createClone();
        phase_ = rhs.phase_->createClone();
        magBar_ = rhs.magBar_->createClone();
        phaseBar_ = rhs.phaseBar_->createClone();
        acp_ = rhs.acp_;
        return *this;
}

std::vector<LauParameter*> LauMagPhaseCPCoeffSet::getParameters()
{
        std::vector<LauParameter*> pars;
        pars.push_back(mag_);
        pars.push_back(phase_);
        pars.push_back(magBar_);
        pars.push_back(phaseBar_);
        return pars;
}

void LauMagPhaseCPCoeffSet::printTableHeading(std::ostream& stream)
{
        stream<<"\\begin{tabular}{|l|c|c|c|c|}"<<endl;
        stream<<"\\hline"<<endl;
        stream<<"Component & Magnitude & Phase & Magnitude_bar & Phase_bar \\\\"<<endl;
        stream<<"\\hline"<<endl;
}

void LauMagPhaseCPCoeffSet::printTableRow(std::ostream& stream)
{
        LauPrint print;
        TString resName = this->name();
        resName = resName.ReplaceAll("_", "\\_");
        stream<<resName<<"  &  $";
        print.printFormat(stream, mag_->value());
        stream<<" \\pm ";
        print.printFormat(stream, mag_->error());
        stream<<"$  &  $";
        print.printFormat(stream, phase_->value());
        stream<<" \\pm ";
        print.printFormat(stream, phase_->error());
        stream<<"$  &  $";
        print.printFormat(stream, magBar_->value());
        stream<<" \\pm ";
        print.printFormat(stream, magBar_->error());
        stream<<"$  &  $";
        print.printFormat(stream, phaseBar_->value());
        stream<<" \\pm ";
        print.printFormat(stream, phaseBar_->error());
        stream<<"$ \\\\"<<endl;
}

void LauMagPhaseCPCoeffSet::randomiseInitValues()
{
        if (mag_->fixed() == kFALSE) {
                // Choose a value for "magnitude" between 0.0 and 2.0
                Double_t value = LauRandom::zeroSeedRandom()->Rndm()*2.0;
                mag_->initValue(value); mag_->value(value);
        }
        if (phase_->fixed() == kFALSE) {
                // Choose a phase between +- pi
                Double_t value = LauRandom::zeroSeedRandom()->Rndm()*LauConstants::twoPi - LauConstants::pi;
                phase_->initValue(value); phase_->value(value);
        }
        if (magBar_->fixed() == kFALSE) {
                // Choose a value for "magnitude" between 0.0 and 2.0
                Double_t value = LauRandom::zeroSeedRandom()->Rndm()*2.0;
                magBar_->initValue(value); magBar_->value(value);
        }
        if (phaseBar_->fixed() == kFALSE) {
                // Choose a phase between +- pi
                Double_t value = LauRandom::zeroSeedRandom()->Rndm()*LauConstants::twoPi - LauConstants::pi;
                phaseBar_->initValue(value); phaseBar_->value(value);
        }
}

void LauMagPhaseCPCoeffSet::finaliseValues()
{
        // retrieve the current values from the parameters
        Double_t mVal= mag_->value();
        Double_t pVal= phase_->value();
        Double_t mBarVal= magBar_->value();
        Double_t pBarVal= phaseBar_->value();
        Double_t genPhase = phase_->genValue();
        Double_t genPhaseBar   = phaseBar_->genValue();
        
        // Check whether we have a negative magnitude.
        // If so make it positive and add pi to the  phase.
        if (mVal < 0.0) {
                mVal *= -1.0;
                pVal += LauConstants::pi;
        }
        if (mBarVal < 0.0) {
                mBarVal *= -1.0;
                pBarVal += LauConstants::pi;
        }

        // Check now whether the phases lies in the right range (-pi to pi).
        Bool_t pWithinRange(kFALSE);
        Bool_t pBarWithinRange(kFALSE);
        while (pWithinRange == kFALSE && pBarWithinRange == kFALSE) {
                if (pVal > -LauConstants::pi && pVal < LauConstants::pi) {
                        pWithinRange = kTRUE;
                } else {
                        // Not within the specified range
                        if (pVal > LauConstants::pi) {
                                pVal -= LauConstants::twoPi;
                        } else if (pVal < -LauConstants::pi) {
                                pVal += LauConstants::twoPi;
                        }
                }

                if (pBarVal > -LauConstants::pi && pBarVal < LauConstants::pi) {
                        pBarWithinRange = kTRUE;
                } else {
                        // Not within the specified range
                        if (pBarVal > LauConstants::pi) {
                                pBarVal -= LauConstants::twoPi;
                        } else if (pBarVal < -LauConstants::pi) {
                                pBarVal += LauConstants::twoPi;
                        }
                }
        }

        // A further problem can occur when the generated phase is close to -pi or pi.
        // The phase can wrap over to the other end of the scale -
        // this leads to artificially large pulls so we wrap it back.
        Double_t diff = pVal - genPhase;
        if (diff > LauConstants::pi) {
                pVal -= LauConstants::twoPi;
        } else if (diff < -LauConstants::pi) {
                pVal += LauConstants::twoPi;
        }

        diff = pBarVal - genPhaseBar;
        if (diff > LauConstants::pi) {
                pBarVal -= LauConstants::twoPi;
        } else if (diff < -LauConstants::pi) {
                pBarVal += LauConstants::twoPi;
        }

        // finally store the new values in the parameters
        // and update the pulls
        mag_->value(mVal);              mag_->updatePull();
        phase_->value(pVal);            phase_->updatePull();
        magBar_->value(mBarVal);        magBar_->updatePull();
        phaseBar_->value(pBarVal);      phaseBar_->updatePull();


}

LauComplex LauMagPhaseCPCoeffSet::particleCoeff()
{
        return LauComplex( mag_->value()*TMath::Cos(phase_->value()), mag_->value()*TMath::Sin(phase_->value()) );
}

LauComplex LauMagPhaseCPCoeffSet::antiparticleCoeff()
{
        return LauComplex( magBar_->value()*TMath::Cos(phaseBar_->value()), magBar_->value()*TMath::Sin(phaseBar_->value()) );
}

void LauMagPhaseCPCoeffSet::setCoeffValues( const LauComplex& coeff, const LauComplex& coeffBar )
{
        mag_->value( coeff.abs() );
        phase_->value( coeff.arg() );

        magBar_->value( coeffBar.abs() );
        phaseBar_->value( coeffBar.arg() );
}

LauParameter LauMagPhaseCPCoeffSet::acp()
{
        // set the name
        TString parName(this->baseName()); parName += "_ACP";
        acp_.name(parName);

        // work out the ACP value

        Double_t value(-99.0);
        value = (magBar_->value()*magBar_->value() - mag_->value()*mag_->value())/(magBar_->value()*magBar_->value() + mag_->value()*mag_->value()); 

        // is it fixed?
        Bool_t fixed = magBar_->fixed() && mag_->fixed();
        acp_.fixed(fixed);

        // we can't work out the error without the covariance matrix
        Double_t error(0.0);

        // set the value and error
        acp_.valueAndErrors(value,error);

        return acp_;
}

LauAbsCoeffSet* LauMagPhaseCPCoeffSet::createClone(const TString& newName, Double_t constFactor)
{
        LauAbsCoeffSet* clone = new LauMagPhaseCPCoeffSet( *this, constFactor );
        clone->name( newName );
        return clone;
}