chigen::ChiGen Class Reference

#include <ChiGen.h>

Public Member Functions
	ChiGen (PartonicModel &partonicModel)
	~ChiGen ()
Pythia8::Event *	next ()
PythiaChiGen *	setPythiaChiGen (PythiaChiGen *pchigen)
	ClassDef (ChiGen, 1)

Private Member Functions
void	boost_lab_frame (Pythia8::Particle *particle)

Private Attributes
unsigned long long	counter
PythiaChiGen *	pchigen
double	betaZ
double	gamma

Detailed Description

Definition at line 14 of file ChiGen.h.

Constructor & Destructor Documentation

chigen::ChiGen::ChiGen

(

chigen::PartonicModel &

p

)

Constructs ChiGen from given partonic model

Parameters

partonic

model

Definition at line 11 of file ChiGen.cxx.

References betaZ, chigen::PartonicModel::eCM, chigen::ensure_chigen_is_initialized(), gamma, pchigen, PROTON_MASS, and sqrt().

                                           : counter(0) {
    chigen::ensure_chigen_is_initialized();
    pchigen = new chigen::PythiaChiGen(p);
    betaZ = sqrt(1 - 4 * pow2(PROTON_MASS) / pow2(p.eCM));
    gamma = 1 / sqrt(1 - pow2(betaZ));
};

chigen::ChiGen::~ChiGen

(

)

Definition at line 18 of file ChiGen.cxx.

                      {
    delete pchigen;
}

Member Function Documentation

void chigen::ChiGen::boost_lab_frame ( Pythia8::Particle *  particle )

private

Boost particle

Definition at line 28 of file ChiGen.cxx.

                                                            {
    double oldPz = particle->pz();
    particle->pz(gamma * (oldPz - betaZ * particle->e()));
    particle->e(gamma * (particle->e() - betaZ * oldPz));
}

chigen::ChiGen::ClassDef	(	ChiGen	,
		1
	)

Pythia8::Event * chigen::ChiGen::next

(

)

Simulates next event and return pointer to it or NULL if no more events can be generated

Returns

pointer to simulated event or NULL if no more events can be generated

Definition at line 34 of file ChiGen.cxx.

References __chigen_cout__, chigen::ostreams::chigen_cout, counter, i, particle, and chigen::ostreams::verbose_mode.

                                 {
    Pythia8::Event* event = pchigen->next();
    if (event == NULL)
        return NULL;

    ++counter;

    Pythia8::Particle* particle = 0;
    for (int i = event->size() - 1; i >= 0; --i) {
        particle = &event->at(i);
        boost_lab_frame(particle);
    }

    __chigen_cout__ << "Event number " << counter << "." << std::endl;
    if (chigen::ostreams::verbose_mode)
        event->list(*chigen::ostreams::chigen_cout);

    return event;
}

chigen::PythiaChiGen * chigen::ChiGen::setPythiaChiGen

(

chigen::PythiaChiGen *

p

)

Set the internal PythiaChiGen instance by specified one, and return the old one

Parameters

pchigen

Returns

old instance

Definition at line 22 of file ChiGen.cxx.

References p.

                                                                       {
    chigen::PythiaChiGen* oldPointer = pchigen;
    pchigen = p;
    return oldPointer;
}

Member Data Documentation

double chigen::ChiGen::betaZ

private

boost velocity

Definition at line 54 of file ChiGen.h.

Referenced by ChiGen().

unsigned long long chigen::ChiGen::counter

private

Events counter

Definition at line 48 of file ChiGen.h.

double chigen::ChiGen::gamma

private

Definition at line 54 of file ChiGen.h.

Referenced by ChiGen().

PythiaChiGen* chigen::ChiGen::pchigen

private

Definition at line 50 of file ChiGen.h.

Referenced by ChiGen().

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The documentation for this class was generated from the following files:

• ChiGen.h
• ChiGen.cxx