EvtbsToLLLLHyperCP.cpp

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#include "EvtGenModels/EvtbsToLLLLHyperCP.hh"

#include "EvtGenBase/EvtGenKine.hh"
#include "EvtGenBase/EvtPDL.hh"
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtReport.hh"

#include "EvtGenModels/EvtbsToLLLLHyperCPAmp.hh"

#include <stdlib.h>
#include <string.h>

EvtbsToLLLLHyperCP::~EvtbsToLLLLHyperCP()
{
    if ( _calcamp )
        delete _calcamp;
}

// The module name specification
std::string EvtbsToLLLLHyperCP::getName()
{
    return "BQTOLLLLHYPERCP";
}

// The implementation of the clone() method
EvtDecayBase* EvtbsToLLLLHyperCP::clone()
{
    return new EvtbsToLLLLHyperCP;
}

// The inicialization of the decay model
//
// Tn the our model we have are following 14 arguments:
//
//               mS      - the mass of the scalar sgoldstino "S" (GeV);
//               mP      - the mass of the pseudoscalar sgoldstino "P" (GeV);
//           gammaS      - the decay width of the scalar sgoldstino "S" (GeV);
//           gammaP      - the decay width of the pseudoscalar sgoldstino "P" (GeV);
//           mLiiLR      -
//               Fc      - coupling constant (GeV);
//        mDijLL(RR)     - parameters for \bar Bq-decays
//        mDjiLL(RR)     - parameters for Bq-decays (i <-> j!)
//                         d==1, s==2, b==3
//
void EvtbsToLLLLHyperCP::init()
{
    // check that there are 14 arguments
    checkNArg( 14 );
    // check that there are 4 daughteres
    checkNDaug( 4 );

    // We expect that the parent to be a scalar (B-meson)
    // and the daughters to be l^+, l^-, l^+ and l^-
    checkSpinParent( EvtSpinType::SCALAR );

    // We expect that the all daughters are the ell+ or ell- == DIRAC
    checkSpinDaughter( 0, EvtSpinType::DIRAC );
    checkSpinDaughter( 1, EvtSpinType::DIRAC );
    checkSpinDaughter( 2, EvtSpinType::DIRAC );
    checkSpinDaughter( 3, EvtSpinType::DIRAC );

    _calcamp = new EvtbsToLLLLHyperCPAmp();
}

// Set the maximum probability of the decay
void EvtbsToLLLLHyperCP::initProbMax()
{
    double mymaxprob = -10.0;    // maximum of the probability

    EvtId parnum, l1num, l2num, l3num, l4num;

    parnum = getParentId();
    l1num = getDaug( 0 );
    l2num = getDaug( 1 );
    l3num = getDaug( 2 );
    l4num = getDaug( 3 );

    double mS = getArg( 0 );
    double mP = getArg( 1 );
    double gammaS = getArg( 2 );
    double gammaP = getArg( 3 );
    double mLiiLR = getArg( 4 );
    double Fc = getArg( 5 );
    double mD23LL = getArg( 6 );
    double mD23RR = getArg( 7 );
    double mD32LL = getArg( 8 );
    double mD32RR = getArg( 9 );
    double mD13LL = getArg( 10 );
    double mD13RR = getArg( 11 );
    double mD31LL = getArg( 12 );
    double mD31RR = getArg( 13 );

    mymaxprob = _calcamp->CalcMaxProb( parnum, l1num, l2num, l3num, l4num, mS,
                                       mP, gammaS, gammaP, mLiiLR, Fc, mD23LL,
                                       mD23RR, mD32LL, mD32RR, mD13LL, mD13RR,
                                       mD31LL, mD31RR );

    if ( mymaxprob <= 0.0 ) {
        EvtGenReport( EVTGEN_ERROR, "EvtGen" )
            << "The function void EvtbsToLLLLHyperCP::initProbMax()"
            << "\n Unexpected value of the probability maximum!"
            << "\n mymaxprob = " << mymaxprob << std::endl;
        ::abort();
    }

    setProbMax( mymaxprob );
}

void EvtbsToLLLLHyperCP::decay( EvtParticle* p )
{
    double mS = getArg( 0 );
    double mP = getArg( 1 );
    double gammaS = getArg( 2 );
    double gammaP = getArg( 3 );
    double mLiiLR = getArg( 4 );
    double Fc = getArg( 5 );
    double mD23LL = getArg( 6 );
    double mD23RR = getArg( 7 );
    double mD32LL = getArg( 8 );
    double mD32RR = getArg( 9 );
    double mD13LL = getArg( 10 );
    double mD13RR = getArg( 11 );
    double mD31LL = getArg( 12 );
    double mD31RR = getArg( 13 );

    p->initializePhaseSpace( getNDaug(), getDaugs() );

    _calcamp->CalcAmp( p, _amp2, mS, mP, gammaS, gammaP, mLiiLR, Fc, mD23LL,
                       mD23RR, mD32LL, mD32RR, mD13LL, mD13RR, mD31LL, mD31RR );

    //  EvtGenReport(EVTGEN_NOTICE,"EvtGen") << "\n The function EvtbsToLLLLHyperCP::decay(...) passed with arguments:"
    //                        << "\n mS = " << mS
    //                        << "\n mP = " << mP
    //                        << "\n gammaS = " << gammaS
    //                        << "\n gammaP = " << gammaP
    //                        << "\n mLiiLR = " << mLiiLR
    //                        << "\n Fc = " << Fc
    //                        << "\n mD23LL = " << mD23LL
    //                        << "\n mD23RR = " << mD23RR
    //                        << "\n mD32LL = " << mD32LL
    //                        << "\n mD32RR = " << mD32RR
    //                        << "\n mD13LL = " << mD13LL
    //                        << "\n mD13RR = " << mD13RR
    //                        << "\n mD31LL = " << mD31LL
    //                        << "\n mD31RR = " << mD31RR
    //                        << std::endl;
}