EvtRaritaSchwinger.cpp

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#include "EvtGenBase/EvtRaritaSchwinger.hh"

#include "EvtGenBase/EvtPatches.hh"
using std::endl;
using std::ostream;

EvtRaritaSchwinger rotateEuler( const EvtRaritaSchwinger& rs, double alpha,
                                double beta, double gamma )
{
    EvtRaritaSchwinger tmp( rs );
    tmp.applyRotateEuler( alpha, beta, gamma );
    return tmp;
}

EvtRaritaSchwinger boostTo( const EvtRaritaSchwinger& rs, const EvtVector4R p4 )
{
    EvtRaritaSchwinger tmp( rs );
    tmp.applyBoostTo( p4 );
    return tmp;
}

EvtRaritaSchwinger boostTo( const EvtRaritaSchwinger& rs, const EvtVector3R boost )
{
    EvtRaritaSchwinger tmp( rs );
    tmp.applyBoostTo( boost );
    return tmp;
}

void EvtRaritaSchwinger::set( int i, int j, const EvtComplex& sp )
{
    _rs[i][j] = sp;
}

EvtComplex EvtRaritaSchwinger::get( int i, int j ) const
{
    return _rs[i][j];
}

void EvtRaritaSchwinger::applyRotateEuler( double alpha, double beta,
                                           double gamma )
{
    //inefficient but simple to code...
    EvtVector4C v0 = getVector( 0 );
    EvtVector4C v1 = getVector( 1 );
    EvtVector4C v2 = getVector( 2 );
    EvtVector4C v3 = getVector( 3 );
    v0.applyRotateEuler( alpha, beta, gamma );
    v1.applyRotateEuler( alpha, beta, gamma );
    v2.applyRotateEuler( alpha, beta, gamma );
    v3.applyRotateEuler( alpha, beta, gamma );
    setVector( 0, v0 );
    setVector( 1, v1 );
    setVector( 2, v2 );
    setVector( 3, v3 );
    EvtDiracSpinor sp0 = getSpinor( 0 );
    EvtDiracSpinor sp1 = getSpinor( 1 );
    EvtDiracSpinor sp2 = getSpinor( 2 );
    EvtDiracSpinor sp3 = getSpinor( 3 );
    sp0.applyRotateEuler( alpha, beta, gamma );
    sp1.applyRotateEuler( alpha, beta, gamma );
    sp2.applyRotateEuler( alpha, beta, gamma );
    sp3.applyRotateEuler( alpha, beta, gamma );
    setSpinor( 0, sp0 );
    setSpinor( 1, sp1 );
    setSpinor( 2, sp2 );
    setSpinor( 3, sp3 );
}

void EvtRaritaSchwinger::applyBoostTo( const EvtVector4R p4 )
{
    double e = p4.get( 0 );

    EvtVector3R boost( p4.get( 1 ) / e, p4.get( 2 ) / e, p4.get( 3 ) / e );

    applyBoostTo( boost );

    return;
}

void EvtRaritaSchwinger::applyBoostTo( const EvtVector3R boost )
{
    //inefficient but simple to code...
    EvtVector4C v0 = getVector( 0 );
    EvtVector4C v1 = getVector( 1 );
    EvtVector4C v2 = getVector( 2 );
    EvtVector4C v3 = getVector( 3 );
    v0.applyBoostTo( boost );
    v1.applyBoostTo( boost );
    v2.applyBoostTo( boost );
    v3.applyBoostTo( boost );
    setVector( 0, v0 );
    setVector( 1, v1 );
    setVector( 2, v2 );
    setVector( 3, v3 );
    EvtDiracSpinor sp0 = getSpinor( 0 );
    EvtDiracSpinor sp1 = getSpinor( 1 );
    EvtDiracSpinor sp2 = getSpinor( 2 );
    EvtDiracSpinor sp3 = getSpinor( 3 );
    sp0.applyBoostTo( boost );
    sp1.applyBoostTo( boost );
    sp2.applyBoostTo( boost );
    sp3.applyBoostTo( boost );
    setSpinor( 0, sp0 );
    setSpinor( 1, sp1 );
    setSpinor( 2, sp2 );
    setSpinor( 3, sp3 );
}

ostream& operator<<( ostream& s, const EvtRaritaSchwinger& rs )
{
    int i, j;
    s << endl;
    for ( i = 0; i < 4; i++ ) {
        for ( j = 0; j < 4; j++ ) {
            s << rs._rs[i][j];
        }
        s << endl;
    }
    return s;
}

EvtVector4C EvtRaritaSchwinger::getVector( int i ) const
{
    EvtVector4C tmp( _rs[i][0], _rs[i][1], _rs[i][2], _rs[i][3] );
    return tmp;
}

EvtDiracSpinor EvtRaritaSchwinger::getSpinor( int i ) const
{
    EvtDiracSpinor tmp;
    tmp.set( _rs[0][i], _rs[1][i], _rs[2][i], _rs[3][i] );
    return tmp;
}

void EvtRaritaSchwinger::setVector( int i, const EvtVector4C& v )
{
    _rs[i][0] = v.get( 0 );
    _rs[i][1] = v.get( 1 );
    _rs[i][2] = v.get( 2 );
    _rs[i][3] = v.get( 3 );
}

void EvtRaritaSchwinger::setSpinor( int i, const EvtDiracSpinor& sp )
{
    _rs[0][i] = sp.get_spinor( 0 );
    _rs[1][i] = sp.get_spinor( 1 );
    _rs[2][i] = sp.get_spinor( 2 );
    _rs[3][i] = sp.get_spinor( 3 );
}

EvtRaritaSchwinger dirProd( EvtVector4R v, EvtDiracSpinor u )
{
    int i, j;

    EvtRaritaSchwinger tmp;

    for ( i = 0; i < 4; i++ ) {
        for ( j = 0; j < 4; j++ ) {
            tmp._rs[i][j] = u.get_spinor( i ) * v.get( j );
        }
    }

    return tmp;
}

EvtRaritaSchwinger dirProd( EvtVector4C v, EvtDiracSpinor u )
{
    int i, j;

    EvtRaritaSchwinger tmp;

    for ( i = 0; i < 4; i++ ) {
        for ( j = 0; j < 4; j++ ) {
            tmp._rs[i][j] = u.get_spinor( i ) * v.get( j );
        }
    }

    return tmp;
}

EvtComplex operator*( const EvtRaritaSchwinger& u1, const EvtRaritaSchwinger& u2 )
{
    int i, j;
    EvtComplex tmp = 0.0;

    for ( i = 0; i < 4; i++ ) {
        for ( j = 0; j < 4; j++ ) {
            tmp += conj( u1._rs[i][j] ) * u2._rs[i][j];
        }
    }

    return tmp;
}

EvtRaritaSchwinger& EvtRaritaSchwinger::operator+=( const EvtRaritaSchwinger& u2 )
{
    int i, j;

    for ( i = 0; i < 4; i++ ) {
        for ( j = 0; j < 4; j++ ) {
            _rs[i][j] += u2._rs[i][j];
        }
    }

    return *this;
}

EvtRaritaSchwinger operator+( const EvtRaritaSchwinger& u1,
                              const EvtRaritaSchwinger& u2 )
{
    return EvtRaritaSchwinger( u1 ) += u2;
}

EvtRaritaSchwinger& EvtRaritaSchwinger::operator-=( const EvtRaritaSchwinger& u2 )
{
    int i, j;

    for ( i = 0; i < 4; i++ ) {
        for ( j = 0; j < 4; j++ ) {
            _rs[i][j] += u2._rs[i][j];
        }
    }

    return *this;
}

EvtRaritaSchwinger operator-( const EvtRaritaSchwinger& u1,
                              const EvtRaritaSchwinger& u2 )
{
    return EvtRaritaSchwinger( u1 ) -= u2;
}